Chandra Cycle 8 Science Programs

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SOLAR SYSTEM
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Proposal Number: 08100480
Proposal Title: X-Ray Observations of Jupiter in Support of the New Horizons Flyby PI: G. Gladstone
Subject Category: SOLAR SYSTEM
Abstract: On February 28th 2007, the New Horizons (NH) spacecraft will flyby Jupiter for a gravity assist to Pluto. Closest approach (C/A) is 32 Jupiter radii, but the NH instruments will conduct intensive studies from C/A-52d to C/A+100d. Important new studies of auroral and magnetospheric physics are planned that may be well-supported by Chandra observations. Chandra support of the Cassini flyby of Jupiter in 2000 led to a major revision of our understanding of Jupiter's x-ray aurora. We propose 108ks of Chandra time to support three planned NH investigations; a time-variability study during approach, a multi-spectral morphology study near C/A, and a magnetotail dynamics study as NH heads to Pluto. In addition, we request 72ks of XMM-Newton time to investigate spectral differences at low energy. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Jupiter ACIS-S NONE 18.0000 Jupiter ACIS-S NONE 18.0000 Jupiter ACIS-S NONE 18.0000 Jupiter ACIS-S NONE 18.0000 Jupiter ACIS-S NONE 18.0000 Jupiter ACIS-S NONE 18.0000 ==========================================================================================

Proposal Number: 08100802
Proposal Title: Solar wind charge exchange induced X-rays at Venus during the Messenger flyby PI: Konrad Dennerl
Subject Category: SOLAR SYSTEM
Abstract: The interaction of the solar wind with planetary atmospheres has important consequences for their evolution. This process can be studied particularly well at Venus, because there the solar wind flow is not attenuated by a planetary magnetic field and interacts directly with its atmosphere. The discovery of cometary X-ray emission has demonstrated that charge exchange induced X-rays of heavy solar wind ions can be used as an efficient tracer of low density gas, offering a unique window on this interaction, with many diagnostic qualities. We propose to utilize the exceptional opportunity provided by the Messenger flyby in June 2007 and the presence of Venus Express for combining local measurements with the global view provided by Chandra for a pioneering X-ray study of this interaction. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Venus ACIS-I NONE 80.0000
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NORMAL STARS AND WD
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Proposal Number: 08200053
Proposal Title: High Resolution Studies of Pre-Main Sequence Stars in Orion PI: Claude Canizares
Subject Category: STARS AND WD
Abstract: The Trapezium Cluster at the center of the Orion Nebula Cluster (ONC) is one of the youngest and closest (440 pc) star-forming regions. Many of the properties we know today are derived from X-ray signatures. Here we study highly resolved X-ray spectra of a large ensemble of very young and chemically similar PMS stars in terms of their magnetic and accretion properties. This is the second of three installments of our Orion HETG program, the first one was for 100 ks in AO6, a third one for 150 ks will follow in AO9. In these pointings we add more counts to our current sample of Orion stars, which so far include 4 spectra of massive Trapezium stars and 2 late-type PMS stars. A series of 6 pointings will result in at least 6 additional PMS spectra and higher quality Trapezium spectra. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:35:16.10 -05:21:09.50 Orion Trapezium Clus ACIS-S HETG 25.0000 05:35:16.80 -05:24:04.20 Orion Trapezium Clus ACIS-S HETG 25.0000 05:35:17.20 -05:23:16.40 Orion Trapezium Clus ACIS-S HETG 25.0000 05:35:17.20 -05:21:31.70 Orion Trapezium Clus ACIS-S HETG 25.0000 05:35:18.00 -05:22:05.10 Orion Trapezium Clus ACIS-S HETG 25.0000 05:35:18.80 -05:22:45.90 Orion Trapezium Clus ACIS-S HETG 25.0000 ==========================================================================================

Proposal Number: 08200106
Proposal Title: THE FASTEST CORONA IN TOWN PI: DAVID GARCIA-ALVAREZ
Subject Category: STARS AND WD
Abstract: The young (12 Myr) Beta Pic moving group member HD 199143 (F8V) has the largest v sini of any known solar-like star accessible to Chandra gratings and represents a unique opportunity to study surface magnetic and coronal structure on a young solar analogue. Our proposed HETG+ACIS-S will probe the scale height of the hot magnetised outer atmosphere coronal through Doppler rotational line broadening. Rotationally-induced Doppler shifts will probe the presence of dominant coronal features at lower latitudes. Provide plasma temperature structure, density and chemical composition. The results will be used to complement and test 3-D coronal models deduced from extrapolation of photospheric magnetic fields from a contemporaneous Zeeman-Doppler imaging study. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:55:47.70 -17:06:51.00 HD 199143 ACIS-S HETG 135.0000 ==========================================================================================

Proposal Number: 08200110
Proposal Title: Burn Out or Fade Away? Probing the X-ray Death of Intermediate Mass Stars PI: Jeremy Drake
Subject Category: STARS AND WD
Abstract: We propose HRC-I snapshots of the very young early A-type stars HR4796A (8 Myr) and beta Pic (~20 Myr) to search for remnant X-ray activity from the Herbig Ae phase. Both stars have dusty disks and are in the epoch of planet formation. They are the youngest A-type main-sequence stars for which accurate ages have been determined, are devoid of stellar companions and are the best available candidates to probe the mystery of how early A stars decline in X-ray luminosity at least 100,000 fold from 10^31 erg/s to L_X < 10^26 erg/s in a few million years. The results will be important for understanding the formation of stars and planets at intermediate stellar masses, and the evolution of their high energy environments and magnetic activity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:36:01.00 -39:52:10.20 HR4796 HRC-I NONE 20.0000 ==========================================================================================

Proposal Number: 08200158
Proposal Title: X-Ray Emission from Low-Mass Protostars in Small Dark Clouds PI: Theodore Simon
Subject Category: STARS AND WD
Abstract: A handful of Class I protostars have been detected in X rays, but no firmly established Class 0 object has ever been detected as an X ray source. I am proposing to obtain 60 ks pointings with the ACIS-I camera of four small dark cloud regions, each of which is known to harbor high-velocity molecular outflows, long chains of HH emission knots, and low-luminosity Class 0 IRAS sources. The goal is to determine whether the X ray and other physical properties of these objects are different from those of embedded protostars that form in much more massive clouds. Because of their lower density and mass, these small clouds may be more transparent to X rays and hence more easily probed than a dense cloud like Orion. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:38:47.00 +75:11:30.00 L1251B-VLA3 ACIS-I NONE 60.0000 ==========================================================================================

Proposal Number: 08200171
Proposal Title: A search for cool gas in the X-ray emitting wind of O-stars PI: Ton Raassen
Subject Category: STARS AND WD
Abstract: Pollock and Raassen developed a new paradigm for X-ray emission in O-stars. It implies that the X-ray emission originates from proton-excitations far out in the wind in an area with non-equilibrium plasma, while generally is assumed that the X-rays are emitted in hot plasma in equilibrium near the stellar surface. We use LETGS spectra to search for this cool gas in O-star wind detectable by CV, OVI, NeVIII, MgVIII-MgX, SiIX-SiXII, SXII, SXIII, FeXVI above 37 Angstrom (the cut-off of XMM-Newton). Our first goal is to identify these cooler (low-ionized) ions upto 80 Angstrom as indication for non-equilibrium plasma. No O-stars have been studied extensively thusfar above 37 Angstrom. Delta Ori is chosen, because of its low interstellar absorption. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:32:00.40 -00:17:56.70 delta Ori HD 36486 HRC-S LETG 100.0000 ==========================================================================================

Proposal Number: 08200188
Proposal Title: Resolving the X-ray Emission from Massive Protostars in the NGC 2071 Cluster Core PI: Stephen Skinner
Subject Category: STARS AND WD
Abstract: One of the most spectacular star-forming regions in Orion is the young infrared cluster in NGC 2071. Its importance derives from the presence of several massive protostars in a dense central subgroup known as NGC 2071-IR, which are some of the closest such objects known. A recent XMM-Newton observation resulted in the surprising detection of hard X-ray emission accompanied by a strong fluorescent Fe I line from the central group of massive protostars. The emission is likely associated with the massive embedded protostar IRS-1, which drives a powerful bipolar outflow. We propose a follow-up Chandra observation that will provide the high angular resolution needed to reliably identify IR counterparts in the crowded cluster core and search for signatures of shock-related emission. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:47:04.80 +00:21:42.80 NGC2071-IRS1 ACIS-I NONE 70.0000 ==========================================================================================

Proposal Number: 08200206
Proposal Title: Evolution of Magnetic Activity and the Accretion History in Taurus-Auriga Multiple Systems PI: Manuel Guedel
Subject Category: STARS AND WD
Abstract: We request Chandra observing time to survey pre-main sequence binary and multiple systems in the Taurus-Auriga Molecular Cloud (TMC) that can be studied exclusively by Chandra. These systems show separations between components in the range of ~1-5". TMC contains an anomalously high fraction of binaries and is therefore a testbed for binary formation theories. X-ray studies provide important diagnostics related to accretion processes and evolution of the TMC sample. This Chandra project will be an integral part of a large, deep survey of the TMC that has been conducted with the Spitzer Space Telescope, XMM-Newton, and optical and near-infrared ground-based telescopes. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 04:03:49.20 +26:10:54.00 HBC 358/59 ACIS-S NONE 10.0000 04:33:54.70 +26:13:28.00 IT Tau ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08200213
Proposal Title: Is W40 the Richest Nearby Young Stellar Cluster after Orion? PI: Konstantin Getman
Subject Category: STARS AND WD
Abstract: There is now recent evidence that the poorly studied HII region W40 is one of the richest young stellar clusters near the Sun. We propose a 40ks ACIS-I Chandra exposure to study the underlying stellar population of W40. We will detect the X-ray brighter, higher-mass individual members of the region down to 0.4Msun and, through XLF analysis, establish the population of undetected lower-mass objects. Combining Chandra data with our deep JHK/H2 images obtained at the UKIRT telescope on Mauna Kea will allow us information about the IMF of cluster members, their protoplanetary disks, and protostars undergoing outflow events. Likely being the richest star forming cloud within 600 pc after Orion, W40 has the potential to offer us a different window to the formation processes of stars in clusters. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:31:23.90 -02:05:29.50 W40 ACIS-I NONE 40.0000 ==========================================================================================

Proposal Number: 08200263
Proposal Title: Hot Gas in the Eskimo Nebula: Shocked Fast Stellar Wind or Fast Collimated Outflows? PI: Martin Guerrero
Subject Category: STARS AND WD
Abstract: It is commonly accepted that fast stellar winds and fast collimated outflows are responsible for the shaping of planetary nebulae (PNe). Both fast stellar winds and collimated outflows can produce shock-heated gas that emits diffuse X-rays; thus, X-ray observations of PNe can be used to gain insight into the formation and shaping of PNe. Few PNe, however, show detectable diffuse X-ray emission and in only two cases this can be attributed to fast collimated outflows. Our XMM-Newton observations of the Eskimo Nebula reveal diffuse X-ray emission that may originate from both its fast stellar wind and from its bipolar outflows. We request Chandra ACIS observations to resolve the X-ray emission from the Eskimo Nebula and to determine its origin. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 07:29:10.80 +20:54:42.50 NGC 2392 ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08200400
Proposal Title: Hot gas and cool dust around B[e] Supergiants PI: Joel Kastner
Subject Category: STARS AND WD
Abstract: We propose a joint Chandra/ACIS and Spitzer/IRS survey of plasma and thermal dust emission from CI Cam and five other galactic B[e] supergiant systems that are bright mid-IR sources. The results will test the hypothesis that many such stars harbor quiescent, "CI Cam-like" X-ray sources, and that these sources may be intimately related to the presence of binary companions as well as to the dusty disks recently detected in IRS spectoscopy of B[e] supergiants. ACIS spectrscopy will establish the presence and strength of any Fe fluorescence line emission in these systems. In parallel, the proposed joint Spitzer IRS observations will provide the means to ascertain the origin and evolution of dusty disks around B[e] supergiants. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 10:15:21.90 -57:51:42.70 CPD -57 9243 ACIS-I NONE 20.0000 16:07:02.00 -53:03:45.80 CPD -52 9243 ACIS-I NONE 20.0000 17:15:15.30 -40:20:06.70 HD 327083 ACIS-I NONE 20.0000 ==========================================================================================

Proposal Number: 08200445
Proposal Title: The shock physics at the colliding winds in WR 146 PI: Julian Pittard
Subject Category: STARS AND WD
Abstract: WR+O star binary systems produce a region of hot shocked plasma where the stellar winds collide - the wind-collision region (WCR). The hot plasma produces thermal X-ray emission, while synchrotron radio emission arises from relativistic electrons believed to be accelerated at the shocks bounding the WCR. Such systems provide an excellent laboratory for the study of shock thermalization and particle acceleration, with the same physical processes as observed in SNRs, but at much higher mass, photon, and magnetic energy densities. We propose an X-ray observation of WR146 to search for signs of weak shock heating and shock modification, and to determine the non-thermal particle distribution, providing insight into the nature of particle acceleration and its feedback on the shock structure. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:35:47.10 +41:22:44.70 WR146 ACIS-I NONE 20.0000 ==========================================================================================

Proposal Number: 08200495
Proposal Title: Evolution of Accretion and X-Rays in Lynds 1228 PI: Manuel Guedel
Subject Category: STARS AND WD
Abstract: We propose to observe two centers of low-mass star formation in the Lynds 1228 dark cloud. L1228 is one of the most active star-formation regions within the Cepheus giant molecular cloud complex. Recent Spitzer Space Telescope observations have shown a wide variety of pre-main sequence stars at various stages of evolution, ranging from embedded, jet+outflow driving protostars to classical and weak-lined T Tauri stars with very different circumstellar-disk characteristics. We aim at studying the influence of accretion and disk parameters on X-ray production in a region with characteristics intermediate between the Taurus and the Orion star-forming regions. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:57:11.70 +77:35:47.90 L1228 core ACIS-I NONE 40.0000 ==========================================================================================

Proposal Number: 08200531
Proposal Title: The Full Picture of Magnetic Activity in Ultracool Dwarfs: Simultaneous Observations of Coronae and Chromospheres PI: Edo Berger
Subject Category: STARS AND WD
Abstract: Only a decade ago, theoretical expectation was that magnetic activity would disappaer beyond M5. While we now know that stellar activity exists in some late-M dwarfs, only a few such objects have been observed in the X-rays. Thus, the ubiquity and physics of coronae and magnetic fields remain unclear. This is exacerbated by the shift to flaring emission, whose properties are poorly characterized due to the lack of simultaneous observations. It is therefore time to produce a complete picture of the coronae and chromospheres in ultracool dwarfs, and directly implicate magnetic fields in this activity. Here we propose to delineate the underlying physics of the magnetic activity with fully simultaneous observations in the X-ray, radio, and H-alpha bands. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 15:01:08.20 +22:50:02.00 TVLM513-46546 ACIS-S NONE 30.0000 16:55:35.40 -08:23:42.30 VB8 ACIS-S NONE 30.0000 19:16:57.70 +05:09:00.00 VB10 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08200549
Proposal Title: Understanding X-ray super-saturation PI: Gaitee Hussain
Subject Category: STARS AND WD
Abstract: X-ray emission is commonly used to measure magnetic activity in cool stars. While X-ray levels and magnetic activity levels rise with stellar rotation rate, X-ray luminosities actually decline or "super-saturate" in the most rapidly rotating stars. Conflicting theories have been used to explain this: e.g., magnetic dynamos are inhibited, surface fields are more confined or their heating is less efficient, or emission is reduced due to centrifugal stripping of the outer corona. We will test different explanations of super-saturation through a multi-wavelength study of the star, AP 139. By comparing rotational modulation in its X-ray lightcurves and temperatures with maps of surface activity we can learn if and how this phenomenon is related to changes in the star's surface fields. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 03:22:06.00 +47:34:07.50 AP 139 ACIS-S NONE 69.0000 ==========================================================================================

Proposal Number: 08200589
Proposal Title: X-ray spectral diagnostics of accretion processes in pre-main sequence stars: TWA14 PI: Paola Testa
Subject Category: STARS AND WD
Abstract: We propose to obtain a 160 ks Chandra LETG+ACIS-S spectrum of TWA14, one of the very few accreting pre-main sequence stars easily accessible to high-resolution spectroscopy, being in the nearby TW Hydrae Association and X-ray bright. This observation will provide unique X-ray diagnostics of accretion and grain depletion of accreting gas, and will determine the role of accretion and star-disk interaction in the high energy emission of classical T Tauri stars. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:13:26.20 -45:23:42.70 TWA14 ACIS-S LETG 160.0000 ==========================================================================================

Proposal Number: 08200625
Proposal Title: The Fainting of Alpha Cen A PI: Thomas Ayres
Subject Category: STARS AND WD
Abstract: Alpha Centauri (G2V+K1V) is the nearest system of solar-like stars; the primary has long been regarded a solar twin. Historical X-ray missions have been able to separate the coronal point sources (14" apart in Y2000), although the orbit now is closing rapidly and beyond 2006 can only be resolved by Chandra. The 35 year X-ray record has revealed striking long term changes in the Alpha Cen coronae, likely related to analogs of the still mysterious solar sunspot cycle. Recent work suggests that the K star is rising out of a cycle minimum, while the G star has experienced a startling, unprecedented plunge in its X-ray luminosity that calls into question our understanding of stellar dynamos. A deep LETGS spectrum, and two short HRC-I snapshots, will build on this remarkable coronal narrative. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:39:32.30 -60:50:02.00 Alpha Centauri HRC-I NONE 5.0000 14:39:32.30 -60:50:02.00 Alpha Centauri HRC-I NONE 5.0000 14:39:32.30 -60:50:02.00 Alpha Centauri HRC-S LETG 120.0000 ==========================================================================================

Proposal Number: 08200704
Proposal Title: Accretion or a Corona? Definitive Observations of the Young Accreting Star TW Hydrae PI: Nancy Brickhouse
Subject Category: STARS AND WD
Abstract: We propose a 500 ks observation of the prototypical accreting young star TW Hydrae to determine whether the X-ray emission is from a hot corona or an accretion shock. In the short archival spectrum, O VII and Ne IX forbidden to intercombination lines signal either extremely high densities that must be associated with a shock, or photoexcitation by UV continuum emission. The definitive measurement for the density is the analogous Mg XI line ratio. We will also measure velocity shifts and line broadening, search for rotational modulation, and determine elemental abundances using standard emission measure distribution techniques. This deep spectrum will probe the density and structure of the magnetic regions associated with the accretion process during star formation. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:01:52.00 -34:42:16.90 TW Hya ACIS-S HETG 20.0000 11:01:52.00 -34:42:16.90 TW Hya ACIS-S HETG 160.0000 11:01:52.00 -34:42:16.90 TW Hya ACIS-S HETG 160.0000 11:01:52.00 -34:42:16.90 TW Hya ACIS-S HETG 160.0000 ==========================================================================================

Proposal Number: 08200733
Proposal Title: Hot Gas and Thermal Conduction in Planetary Nebulae PI: Robert Gruendl
Subject Category: STARS AND WD
Abstract: Planetary nebulae (PNe) consist of the material ejected by stars with masses less than 8-10 Msun near the end of their evolution. Shock-heated gas fills the central cavity of PNe and should be detectable in X-rays. The few existing detections of diffuse X-ray emission from PNe appear to suggest that the X-ray luminosity and plasma temperature decrease as a PN evolves. We have used FUSE detections of nebular OVI emission or absorption to identify 3x10E5 K gas from the interface between a hot PN interior and its nebular shell to identify PNe most likely to possess X-ray-emitting gas. We request Chandra observations of two such PNe. These PNe have intermediate ages and can be used to study the role of thermal conduction in PNe as well as better establish how the hot gas evolves with time. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:27:28.00 -12:41:50.00 IC 418 ACIS-S NONE 50.0000 19:44:48.00 +50:31:30.00 NGC 6826 ACIS-S NONE 50.0000 ==========================================================================================

Proposal Number: 08200759
Proposal Title: MAGNETIC FIELDS ON 'ALIEN DWARFS' - II : CORONAL ACTIVITY IN THE ARCTURUS MOVING GROUP PI: Alexander Brown
Subject Category: STARS AND WD
Abstract: The Arcturus Moving Group (AMG) is very likely a remnant of the merger of a dwarf galaxy with the Milky Way Galaxy in the distant past. This kinematically distinct group has members located very close to the Sun, allowing study of coronal activity on very old stars that would typically not be possible. We detected 2 AMG dwarfs with ACIS-S in Cycle 7 with L_x somewhat less than the minimum solar L_x. We propose to observe three additional AMG dwarf members with the aim of determining their X-ray luminosities, coronal temperatures, and the effects of low metallicity on coronal spectra. Our targets have metallicities between 0.4 and 0.04 solar, spectral types F9 - K0, and are at distances less than 30 pc from the Sun. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 10:28:03.90 +48:46:59.40 HD90508 ACIS-S NONE 25.0000 16:13:47.80 -57:34:23.70 HD145417 ACIS-S NONE 35.0000 ==========================================================================================

Proposal Number: 08200767
Proposal Title: Triggered Star-Formation in W5 East PI: Marc Gagne
Subject Category: STARS AND WD
Abstract: W5 is the easternmost portion of an enormous complex of HII regions, star clusters and molecular clouds located at 2 kpc in the Perseus arm. Spitzer mid-infrared images of the "Mountains of Creation" (the bright-rimmed cloud AFGL 4029) are a stunning demonstration of sequential star-formation. Class I protostars are tightly clustered in three regions with slightly older T Tauri stars dispersed about the clusters just ahead of the ionization front advancing into and eroding the molecular cloud. The region is a zoo of high- and low-mass young stellar objects, outflows and nebulae. We propose to image the three clusters with ACIS to characterize X-ray emission from the YSOs, particularly the Class III weak-lined T Tauri stars that cannot be identified through near- and mid-infrared searches. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 03:01:31.40 +60:29:13.00 AFGL 4029 ACIS-I NONE 85.0000 ==========================================================================================

Proposal Number: 08200787
Proposal Title: The high-mass star forming region DR21 PI: Francesco Damiani
Subject Category: STARS AND WD
Abstract: We propose two 100-ksec ACIS-I observations of the extremely young, dense, massive star-forming region DR21 in the Cygnus X complex. We aim at studying how strongly the presence of a cluster of very young massive stars influences the formation and early evolution of lower-mass cluster stars (efficiently selected from ACIS X-ray images), and their circumstellar environment (already being studied with Spitzer data). The DR21 region and the nearby cluster DB16 are a very good laboratory for an observational study of sequential/triggered star formation, to be compared with existing theoretical pictures. We will perform X-ray spectral and variability analysis for the most intense sources. We will also search for diffuse hot gas, found in star-forming regions with similar chaaracteristics. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:39:00.70 +42:18:56.80 DR 21 ACIS-I NONE 100.0000 ==========================================================================================

Proposal Number: 08200821
Proposal Title: Colliding Wind Geometry and Dynamics in Eta Carinae: A New Cycle PI: Michael Corcoran
Subject Category: STARS AND WD
Abstract: X-rays from the supermassive star Eta Car are produced along a ``bow shock'' due to the collision of the wind from the primary star with the faster wind from a hotter, less luminous companion. The 2-10 keV X-ray emission is unique since it's the only radiation which can be clearly localized in the system and it acts as an in-situ probe of the primary star. With the tragic loss of the X-ray Spectrometer on Suzaku, for the foreseeable future the HETGS is the only instrument capable of diagnosing the line emission in this crucial spectral region. We propose to obtain 1 HETGS spectrum of Eta Car in AO8 to compare to our previous HETGS spectra and to provide a clearer measure of the change in the flow as the star approaches periastron/X-ray maximum in January 2009. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 10:45:03.60 -59:41:04.30 Eta Car ACIS-S HETG 100.0000 ==========================================================================================

Proposal Number: 08200904
Proposal Title: Deep Chandra Observations of The Nearest Globular Cluster: Obtaining a Complete Sample of Primordial Binaries PI: David Pooley
Subject Category: STARS AND WD
Abstract: We propose to extend our ongoing efforts to understand the internal dynamics of globular clusters by observing a primordial population of binaries in M4. Our recent work has shown that the active main-sequence binaries in this cluster are largely primordial, rather than dynamically formed (as the low mass X-ray binaries and cataclysmic variables are). A deep Chandra observation will uncover ~90% of this population. This will constitute the first nearly complete and well-defined sample of primordial binaries in a globular cluster. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:23:35.50 -26:31:31.00 M4 ACIS-S NONE 50.0000 16:23:35.50 -26:31:31.00 M4 ACIS-S NONE 50.0000 ==========================================================================================

Proposal Number: 08200925
Proposal Title: The Age of a Stellar System Surrounded by Colliding Planetesimals PI: Benjamin Zuckerman
Subject Category: STARS AND WD
Abstract: BD+20 307 is, by more than an order of magnitude, the dustiest main sequence star known. The dust appears to have been produced by the violent reduction of the equivalent of a ~300 km diameter object into tiny particles within the last 1000 yr. Such events should be rare in something the age of our solar system, but could have been much more common at earlier epochs. To gain insight into the evolution of solar-type planetary systems, we are proposing to constrain the age of BD +20 307 by measuring its X-ray luminosity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:54:50.30 +21:18:22.50 BD +20 307 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08201040
Proposal Title: Nature vs. Nurture: The influence of OB star environments on proto-planetary disk evolution PI: Jeroen Bouwman
Subject Category: STARS AND WD
Abstract: We propose a combined IRAC/IRS study of a large, well-defined and unbiased X-ray selected sample of pre-main-sequence stars in three OB associations: Pismis 24 in NGC 6357, NGC 2244 in the Rosette Nebula, and IC 1795 in the W3 complex. The samples are based on recent Chandra X-ray Observatory studies which reliably identify hundreds of cluster members and were carefully chosen to avoid high infrared nebular background. A new Chandra exposure of IC 1795 is requested, and an optical followup to characterise the host stars is planned. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 02:26:34.40 +62:00:43.00 IC 1795 ACIS-I NONE 50.0000
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WD BINARIES AND CV
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Proposal Number: 08300002
Proposal Title: Monitoring the supersoft source state of many optical novae in the core of M 31 PI: Wolfgang Pietsch
Subject Category: WD BINARIES AND CV
Abstract: We propose to monitor the M31 core with four 23ks XMM-Newton EPIC and four 20ks Chandra HRC-I observations equally distributed over AO5 to determine the duration of the SSS state of optical novae. Detected sources will be correlated with optical nova positions from the WeCAPP program covering the same area. EPIC will determine the SSS nature of sources using hardness ratios, HRC-I will enable continuous monitoring and separate nova candidates from bright X-ray sources. With a nova rate in the field of ~25/yr and SSS phase sometimes lasting for years we will simultaneously follow many nova light curves. The durations of the nova SSS state will allow us to constrain envelope and WD masses. We will also monitor time variability of ~200 M31 centre X-ray sources (mostly XRBs). Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:42:44.30 +41:16:09.40 M31 HRC-I NONE 20.0000 00:42:44.30 +41:16:09.40 M31 HRC-I NONE 20.0000 00:42:44.30 +41:16:09.40 M31 HRC-I NONE 20.0000 00:42:44.30 +41:16:09.40 M31 HRC-I NONE 20.0000 ==========================================================================================

Proposal Number: 08300134
Proposal Title: Testing the Physics of Magnetic Accretion: EX Hydrae from the Shock to the White Dwarf Surface PI: Ronnie Hoogerwerf
Subject Category: WD BINARIES AND CV
Abstract: We propose to observe the magnetic Cataclysmic Variable (CV) EX Hydrae with the HETG to make a direct measurement of the temperature and density structure of its accretion columns and study the physics of the shock and subsequent cooling flow. The accretion column structure, crucial to our understanding of accretion physics, remains one of the last unexplored components of CVs and other accreting objects. The accretion columns of EX Hydrae are unobscured and are periodically occulted by the body of the white dwarf, making it the ideal target for this study. We will use high signal-to-noise light curves for individual spectral lines to measure the temperature and density structure. The result will be applicable to a broad range of objects from clusters of galaxies to T Tauri stars. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:52:24.20 -29:14:56.70 EX Hydrae ACIS-S HETG 20.0000 12:52:24.20 -29:14:56.70 EX Hydrae ACIS-S HETG 160.0000 12:52:24.20 -29:14:56.70 EX Hydrae ACIS-S HETG 160.0000 12:52:24.20 -29:14:56.70 EX Hydrae ACIS-S HETG 160.0000 ==========================================================================================

Proposal Number: 08300374
Proposal Title: Determining the population of Cataclysmic Variables in the Globular Cluster NGC2808 PI: Remon Cornelisse
Subject Category: WD BINARIES AND CV
Abstract: Close binaries, and in particular cataclysmic variables (CVs), play a vital role in the dynamical evolution of globular clusters. It is, therefore, important to understand the formation of these systems in the core of a cluster. Here we propose to test the dynamical formation scenarios of CVs by observing NGC 2808 in the X-rays with Chandra. In combination with already existing FUV imaging with the Hubble Space Telescope on this globular cluster it will be possible to unambiguously identify the CVs, and thereby test the formation scenarios for the first time. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:12:02.60 -64:51:46.20 NGC 2808 ACIS-I NONE 60.0000 ==========================================================================================

Proposal Number: 08300601
Proposal Title: X-ray Measures of Two New Double-Degenerate, Ultracompact AM CVn Binaries PI: Scott Anderson
Subject Category: WD BINARIES AND CV
Abstract: AM CVns are extremely rare double-degenerate cataclysmic variables, encompassing the shortest-period binaries known. They are of high interest as possible supernova progenitors, and especially as likely sources of gravity waves. We have found five new AM CVns in the Sloan Digital Sky Survey (SDSS), a very significant expansion of this elite subclass. We propose initial Chandra flux measures for our two most recent discoveries (the others are slated for cycle 7). Chandra data will constrain their mass accretion rates, a key parameter in understanding the evolutionary interplay between mass-transfer and gravitational radiation. The proposed observations will also sensitively assess the feasibility of follow-on, more detailed X-ray timing and/or spectral studies. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:08:42.00 +35:50:25.10 SDSS J1208+3550 ACIS-S NONE 3.0000 14:11:18.30 +48:12:57.60 SDSS J1411+4812 ACIS-S NONE 3.0000 ==========================================================================================

Proposal Number: 08300667
Proposal Title: Supersoft Sources at Low Metallicity: SMC 13 PI: Thierry Lanz
Subject Category: WD BINARIES AND CV
Abstract: The identification of SN Ia progenitors remains elusive. A promising channel leading to a SN Ia event involves accreting white dwarfs (WD) that sustain steady nuclear burning. They are observed as close binary X-ray sources with a supersoft spectrum (CBSS). We propose to obtain the first Chandra LETGS spectrum of SMC 13, a CBSS in the SMC. From absorption line spectroscopy, we will achieve significant advances in determing the properties of SMC 13 and provide unique data to constrain new evolutionary calculations of accreting hot white dwarfs. At low metallicities, the population of SN Ia progenitors shifts toward systems with higher initial WD masses and lower mass donor stars. This difference might turn out to be crucial to understanding the physics of local vs. distant SN Ia. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:37:19.00 -72:14:14.00 SMC 13 HRC-S LETG 90.0000 ==========================================================================================

Proposal Number: 08300712
Proposal Title: X-ray Observation of a Transient Symbiotic-Star Jet PI: Jennifer Sokoloski
Subject Category: WD BINARIES AND CV
Abstract: Astrophysical jets are ubiquitous in the universe, yet the collimation and acceleration mechanism for these outflows are unclear. Accretion disks, however, are likely to play a key role. White dwarf have possibly the best-understood disks, so symbiotic stars (SS), which are a recently identified class of jet-producing objects, are promising targets. The two SS X-ray jets that have been discovered to date (R Aqr and CH Cyg) both show X-ray structure more extended than their radio jets. To further study the X-ray properties of SS jets, most of which are transient, plus investigate changes in the central object when a jet is ejected, we propose a Chandra TOO observation (slow turn-around) of the next SS jet that is discovered. This proposal was accepted in AO5-AO7 but not triggered. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Transient Symbiotic- ACIS-S NONE 100.0000 ==========================================================================================

Proposal Number: 08300829
Proposal Title: Primordial formation of close binaries in globular clusters with low density cores PI: Albert Kong
Subject Category: WD BINARIES AND CV
Abstract: The primordial binary population is a key input parameter for any realistic model of dense star cluster dynamics. However, the number of primordial binaries and its direct implications for the formation rate of close binaries remain poorly understood. Theoretical calculations show that cataclysmic variables can be formed directly from primordial binaries in or near the core of low core density globular clusters. We propose to use Chandra/HST to study low density core globular clusters systematically and to test the prediction that low-luminosity X-ray sources can be formed from primordial binaries in the cluster core. This project will complement our successful Chandra/HST program to study the dynamical formation of X-ray sources in high core density globular clusters. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:20:59.30 -77:16:57.00 E3 ACIS-S NONE 20.0000 16:27:14.10 -26:01:29.00 NGC6144 ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08300851
Proposal Title: RS Oph: Exploring the Site of a Recurrent Symbiotic Nova Explosion PI: Sumner Starrfield
Subject Category: WD BINARIES AND CV
Abstract: RS Oph is a Recurrent Symbiotic Nova in which a white dwarf orbits inside the outer atmosphere of a red giant and repeatedly explodes on human timescales. Its last outburst began on 12 February 2006 and it is being observed from X-ray wavelengths through to the radio. The X-ray emission is that of a shock moving through the red giant atmosphere and RS Oph is evolving analogously to that of a low-energy Type II Supernova explosion (but faster). By the beginning of Cycle 8, it should be nearly to quiescence and we, therefore, propose two 50 ksec grating observations, separated by about 6 months, in order to study the hot white dwarf and the emission lines from the cooling gas. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:50:13.20 -06:42:28.50 RS Oph HRC-S LETG 20.0000 17:50:13.20 -06:42:28.50 RS Oph HRC-S LETG 40.0000 17:50:13.20 -06:42:28.50 RS Oph HRC-S LETG 40.0000 ==========================================================================================

Proposal Number: 08300935
Proposal Title: Core Collapse Deep Survey: NGC6397 PI: Jonathan Grindlay
Subject Category: WD BINARIES AND CV
Abstract: We propose an ultra-deep survey of the core collapse cluster NGC 6397. At only 2.3kpc, it can be surveyed ~6X deeper (down to Lx=6E28 erg/s) than any globular done with Chandra (e.g. 47Tuc) and with significantly reduced central crowding. Combined with two very deep surveys (V~25-30) just conducted in HST cycle 13, we shall provide the first, and only possible, globular cluster survey for the lowest luminosity cataclysmic variables (CVs: AM CVns and Polars) and millisecond pulsars (MSPs) known in the field. The doubly-recycled MSP (and a second candidate) as well as magnetic CVs will be studied in detail. This compact binary survey will provide a complete census and set of identifications of a large fraction of the cluster's compact binaries, the central engine of core collapse. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:40:42.00 -53:40:27.90 NGC6397 ACIS-S NONE 90.0000 17:40:42.00 -53:40:27.90 NGC6397 ACIS-S NONE 160.0000 ==========================================================================================

Proposal Number: 08301010
Proposal Title: A grating spectrum of a bright nova in outburst PI: Marina Orio
Subject Category: WD BINARIES AND CV
Abstract: We propose to observe a classical or recurrent nova in outburst with the Chandra LETG grating, if it is observed to turn into a luminous supersoft X-ray source using Swift. We also define alternative criteria to trigger the observation in case an observation with XMM-Newton is possible. Our aims are: a) Analyse the spectra of the hot white dwarf (WD) atmosphere, deriving effective temperature, abundances and effective gravity, b) Assess how common it is to find a significant leftover mass on the WD after a nova outburst, c) Measure the short term variability due to non radial oscillations of the white dwarf, d) Possibly also study the supersoft X-ray emission originating in the ejected nebula. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- A new nova HRC-S LETG 35.0000
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Proposal Number: 08400027
Proposal Title: Localizing ill-studied LMXBs PI: Mariano Mendez
Subject Category: BH AND NS BINARIES
Abstract: The goal is to localize several LMXBs with sub-arcsecond accuracy to enable the identification of the optical counterpart, and to monitor RX J1718-4029. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:24:18.10 -31:42:12.00 1RXS J092418.0-31421 HRC-I NONE 1.0000 17:18:24.10 -40:29:33.00 1RXS J171824.2-40293 ACIS-S NONE 2.5000 17:18:24.10 -40:29:33.00 1RXS J171824.2-40293 ACIS-S NONE 2.5000 ==========================================================================================

Proposal Number: 08400031
Proposal Title: Chandra follow-up of weak persistent sources found in INTEGRAL maps PI: Mariano Mendez
Subject Category: BH AND NS BINARIES
Abstract: We propose to obtain a 1 ksec exposure of up to 4 newly found unclassified INTEGRAL sources which are weak persistent X-ray binaries (we exclude from this proposal bright new transients discovered by INTEGRAL). The unique Chandra positional capabilities will allow for an optical follow-up study. Follow-up observations are of paramount importance for the classification of the sources (e.g. as HMXBs/LMXBs, pulsars or in a few rare cases as AXP or DIM). The timing capabilities of the HRC will allow us to search for (slow) pulsations in case the compact object is a neutron star while pile-up which would complicate source localization is no problem. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- IGR persisent weak T HRC-I NONE 1.0000 IGR persisent weak T HRC-I NONE 1.0000 IGR persisent weak T HRC-I NONE 1.0000 IGR persisent weak T HRC-I NONE 1.0000 ==========================================================================================

Proposal Number: 08400032
Proposal Title: Chandra follow-up of weak persistent sources PI: Mariano Mendez
Subject Category: BH AND NS BINARIES
Abstract: We propose to obtain short exposures of a sample of unclassified sources which are likely weak persistent X-ray binaries. The unique Chandra positional capabilities will allow for an optical follow-up study. Follow-up observations are of paramount importance for the classification of the sources (e.g. as HMXBs/LMXBs, pulsars or in a few rare cases as AXP or DIM). The timing capabilities of the HRC will allow us to search for (slow) pulsations in case the compact object is a neutron star while pile-up which would complicate source localization is no problem. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:48:06.90 -45:12:05.30 IGR J16479-4514 HRC-I NONE 1.0000 17:59:46.00 -22:00:54.00 IGR J17597-2201 HRC-I NONE 1.0000 18:48:17.00 -03:10:18.00 IGR J18483-0311 HRC-I NONE 1.0000 ==========================================================================================

Proposal Number: 08400061
Proposal Title: A Pilot Study of X-ray Emission from Candidate Massive Star Clusters PI: Gordon Garmire
Subject Category: BH AND NS BINARIES
Abstract: We propose to continue a pilot study by observing three candidate young (< 10 Myr) clusters of massive (>20 Msun) stars for 10 ks apiece with ACIS-I. The ages, initial mass functions, and total masses, will be determined as part of an LTSA-funded project to study the populations of massive stars in 130 clusters with the VLA, HST, SOFIA, Keck, and Gemini. The observations will (1) identify pulsars, magnetars, and HMXBs, so that we can determine the masses of the progenitors of compact objects, (2) reveal X-ray emisison from colliding-wind binaries, so that we can constrain the binary fraction of massive stars, and (3) measure diffuse X-rays from clusters with a variety of ages, so that we can understand how the winds of the massive stars in clusters interact with their surrounding ISM. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:06:45.00 +59:40:36.00 BDSB2003+50 ACIS-I NONE 10.0000 04:11:10.00 +51:09:58.00 BDSB2003+65 ACIS-I NONE 10.0000 04:36:50.00 +50:52:46.00 BDSB2003+66 ACIS-I NONE 10.0000 ==========================================================================================

Proposal Number: 08400062
Proposal Title: A Pilot Study of X-ray Emission from Candidate Massive Star Clusters PI: Gordon Garmire
Subject Category: BH AND NS BINARIES
Abstract: We propose to continue a pilot study by observing three candidate young (< 10 Myr) clusters of massive (>20 Msun) stars for 10 ks apiece with ACIS-I. The ages, initial mass functions, and total masses, will be determined as part of an LTSA-funded project to study the populations of massive stars in 130 clusters with the VLA, HST, SOFIA, Keck, and Gemini. The observations will (1) identify pulsars, magnetars, and HMXBs, so that we can determine the masses of the progenitors of compact objects, (2) reveal X-ray emisison from colliding-wind binaries, so that we can constrain the binary fraction of massive stars, and (3) measure diffuse X-rays from clusters with a variety of ages, so that we can understand how the winds of the massive stars in clusters interact with their surrounding ISM. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 04:40:39.00 +50:27:39.00 BDSB2003+67 ACIS-I NONE 10.0000 06:15:53.00 +14:16:08.00 BDSB2003+81 ACIS-I NONE 10.0000 06:57:15.00 -08:19:48.00 BDSB2003+93 ACIS-I NONE 10.0000 ==========================================================================================

Proposal Number: 08400081
Proposal Title: Chandra follow-up of weak persistent sources PI: Mariano Mendez
Subject Category: BH AND NS BINARIES
Abstract: We propose to obtain short exposures of a sample of unclassified sources which are likely weak persistent X-ray binaries. The unique Chandra positional capabilities will allow for an optical follow-up study. Follow-up observations are of paramount importance for the classification of the sources (e.g. as HMXBs/LMXBs, pulsars or in a few rare cases as AXP or DIM). The timing capabilities of the HRC will allow us to search for (slow) pulsations in case the compact object is a neutron star while pile-up which would complicate source localization is no problem. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:29:03.00 +59:34:19.00 IGR J00291+5934 ACIS-S NONE 3.0000 07:50:35.30 -15:47:16.00 IGR J07506-1547 HRC-I NONE 1.0000 11:11:25.00 -67:23:31.00 IGR J11114-6723 HRC-I NONE 1.0000 16:19:25.90 -28:09:36.00 IGR J16194-2810 HRC-I NONE 1.0000 16:50:01.20 -33:06:57.00 IGR J16500-3307 HRC-I NONE 1.0000 17:43:00.20 -36:22:51.00 XTE J1743-363 HRC-I NONE 1.0000 18:49:04.00 -00:01:30.00 IGR J18490-0000 HRC-I NONE 1.0000 19:30:46.10 +05:30:07.00 IGR J19308+0530 HRC-I NONE 1.0000 ==========================================================================================

Proposal Number: 08400113
Proposal Title: A Red Giant Companion for the Transient 7.8 s Pulsar XTE J1829-098 ? PI: JULES HALPERN
Subject Category: BH AND NS BINARIES
Abstract: The transient 7.8 s pulsar XTE J1829-098 was discovered in a PCA scan of the Galactic plane, and despite its serendipitous detection by XMM-Newton, we have not been able to identify it optically with the expected Be star or OB supergiant. Neither are its X-ray properties compatible with an anomalous X-ray pulsar (magnetar). A more accurate Chandra position is needed to select among plausible candidates around the XMM error circle, one of which is an extremely cool M9-10 red giant, and apparently a long-period variable. If this star is the companion of XTE J1829-098, it would be the coolest red giant/X-ray binary, and its radial pulsations could cause episodic accretion onto the neutron star, whose X-ray luminosity varies by at least a factor of 1000. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:29:44.10 -09:51:23.30 XTE J1829-098 ACIS-I NONE 5.0000 18:29:44.10 -09:51:23.30 XTE J1829-098 ACIS-I NONE 5.0000 18:29:44.10 -09:51:23.30 XTE J1829-098 ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08400166
Proposal Title: X-Ray Jets in Microquasars PI: Stephane Corbel
Subject Category: BH AND NS BINARIES
Abstract: We propose Target of Opportunity (ToO) observations for detailed studies of X-ray jets from microquasars. We describe our discovery of radio/X-ray jets in two microquasars, why X-ray jets are probably much more common than previously thought, and transient X-ray jets offer an exciting new way to probe the physics of relativistic jets from black holes. The proposed ToO observations are optimized to discover and study (flux evolution, morphology, SED, proper motion, ...) of new X-ray jets from microquasars, triggered by their detection as radio lobes. This will have implications not only for the study of jets from Galactic X-ray binaries, but also for our understanding of relativistic jets from active galactic nuclei (AGN). Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- X-ray Jets ACIS-S NONE 30.0000 X-ray Jets ACIS-S NONE 50.0000 X-ray Jets ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08400356
Proposal Title: High Resolution Spectroscopy of GRS 1915+105 in the 'Soft' State PI: Yoshihiro Ueda
Subject Category: BH AND NS BINARIES
Abstract: We propose to perform a TOO observation of GRS 1915+105 in the soft state with Chandra/HETGS. Investigation of iron-K absorption lines provide us with powerful diagnostics of highly ionized plasma associated with the accretion flow of microquasars. Although such features were discovered firstly from superluminal sources, the nature of the highly ionized plasma in GRS 1915+105 and its possible relation to relativistic jet ejection still remains unclear. This is because the source stays mostly in the low/hard state, where the ions are fully ionized by the strong hard X-ray flux and a very weak feature from H-like Fe ions is observable. Previous ASCA observations indicate that the iron-K absorption features become prominent in this state, thus best suited for detailed plasma diagnostics. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 19:15:11.60 +10:56:44.90 GRS 1915+105 ACIS-S HETG 50.0000 ==========================================================================================

Proposal Number: 08400359
Proposal Title: Following a black hole candidate X-ray transient to quiescence PI: Peter Jonker
Subject Category: BH AND NS BINARIES
Abstract: There is increasing evidence that the quiescent state of BH X-ray binaries is different from the hard state that is observed at higher luminosities. Our recent Chandra campaigns on BH transient decays suggest that a transition takes place when the luminosity suddenly drops by almost three orders of magnitude during a period of only a few weeks. This transition has so far not been resolved, but there is strong evidence that the spectrum softens during this rapid decay. Both the decay and spectral evolution can provide important constraints for jet-dominated and ADAF-like models. We propose a more aggressive program than before and request 6 simultaneous Chandra/VLA TOO observations that aim to cover this rapid transition in full detail for the first time with X-ray and radio observations. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- TOO ACIS-S HETG 7.0000 TOO ACIS-S HETG 7.0000 TOO ACIS-S NONE 7.0000 TOO ACIS-S NONE 15.0000 TOO ACIS-S NONE 35.0000 TOO ACIS-S NONE 100.0000 ==========================================================================================

Proposal Number: 08400362
Proposal Title: Quasi-persistent neutron-star X-ray binaries in quiescence PI: Rudy Wijnands
Subject Category: BH AND NS BINARIES
Abstract: We propose to observe the next (quasi-)persistent neutron-star low-mass X-ray binary that turns off and becomes quiescent. This will provide an excellent opportunity to study the effects of prolonged accretion on the neutron-star properties (i.e., crust and core and thus the properties of ultradense matter) and the quiescent properties of low-mass X-ray binaries. Two follow-up observations taken several months later will provide important information about the time evolution of the quiescent properties. In particular, if indeed the quiescent X-rays are emitted by the crust, we will be able to study its evolution in time,thus setting strong constraints on the crust cooling models and the exact structure of the crust. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Quiescent source ACIS-S NONE 30.0000 Quiescent source ACIS-S NONE 30.0000 Quiescent source ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08400404
Proposal Title: Chandra observations of the 2007 PSR B1259-63 periastron passage. PI: Maria Chernyakova
Subject Category: BH AND NS BINARIES
Abstract: PSR B1259-63 is a unique binary system with a radio pulsar from which unpulsed X-ray, Gamma-ray, and radio emission was observed. The pulsar is in a highly eccentric 3.4 year orbit with a Be star. Collision of the pulsar wind with the wind of Be star plays a crucial role in generation of the observed emission. The goal of this proposal is to investigate spectral evolution of the system as the pulsar passes through the Be star disk, and with the help of the received data to reconstruct the physical processes governing the system. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 13:02:47.60 -63:50:08.70 PSR B1259-63 ACIS-S NONE 3.0000 13:02:47.60 -63:50:08.70 PSR B1259-63 ACIS-S HETG 5.0000 13:02:47.60 -63:50:08.70 PSR B1259-63 ACIS-S HETG 5.0000 13:02:47.60 -63:50:08.70 PSR B1259-63 ACIS-S HETG 7.0000 ==========================================================================================

Proposal Number: 08400470
Proposal Title: Using Chandra to investigate the X-ray properties of the enigmatic, bipolar TeV source HESS J1841-053 PI: Gerd Puehlhofer
Subject Category: BH AND NS BINARIES
Abstract: From a population of Galactic TeV gamma-ray sources newly detected with the H.E.S.S. telescope system, HESS J1841-053 is the only object which shows an extended, bipolar TeV morphology, together with an X-ray binary at the core of the source. We propose to use Chandra observations on the lobes of HESS J1841-053 to identify the nature of the TeV source and to verify its association with the central object. If the suggested identification holds, HESS J1841-053 would represent a new type of X-ray/TeV source. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:39:25.00 -05:48:20.00 HESS J1841-053-SW ACIS-I NONE 20.0000 18:41:60.00 -05:22:04.00 HESS J1841-053-NE ACIS-I NONE 20.0000 ==========================================================================================

Proposal Number: 08400583
Proposal Title: Bright edge-on LMXB transients to map ionized disk atmospheres PI: Laurence Boirin
Subject Category: BH AND NS BINARIES
Abstract: With the discovery of Fe XXV and Fe XXVI lines in several binaries viewed close to the disk plane, XMM and Chandra have revealed the existence of a highly-ionized atmosphere above the accretion disk. We have further demonstrated that the spectral changes during dips from dipping LMXBs, both in the lines and in the continuum could be explained by a decrease in the ionization level of this plasma. We want to investigate the presence of such a highly ionized plasma in three other binaries viewed close to the disk plane should these currently quiet transient sources turn on. We wish to constrain the plasma properties (location in binary, stationary or outflow) as a function of binary parameters (inclination, period) and luminosity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:02:06.50 -29:56:44.10 MXB 1659-298 ACIS-S HETG 90.0000 17:58:40.00 -33:48:27.00 4U 1755-33 ACIS-S HETG 90.0000 21:31:26.20 +47:17:02.00 4U 2129+47 ACIS-S HETG 90.0000 ==========================================================================================

Proposal Number: 08400666
Proposal Title: Precise Localization of Neutron Star Soft X-ray Transients PI: Deepto Chakrabarty
Subject Category: BH AND NS BINARIES
Abstract: We propose to observe four neutron star (NS) soft X-ray transients in outburst to obtain accurate source positions, continuing a successful program from the previous 2 cycles. This continuing study will allow us to reobserve such sources in future cycles to study the quiescent X-ray emission in NS SXTs. Recent results from Chandra and XMM suggest that the standard picture of NS SXT emission may not be as straightforward as previously thought. This proposal will increase the number of known SXTs with good positions, providing a more uniform sample of the population for future work. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- NS SXT HRC-S NONE 1.0000 NS SXT HRC-S NONE 1.0000 NS SXT HRC-S NONE 1.0000 NS SXT HRC-S NONE 1.0000 ==========================================================================================

Proposal Number: 08400682
Proposal Title: The Ring of Fire: Constraining the jet power of Cygnus X-1 from its shocked shell. PI: Sebastian Heinz
Subject Category: BH AND NS BINARIES
Abstract: We propose a 50ksec ACIS-I oservation of the shocked radio shell recently found around the black hole X-ray binary Cyg X-1. This shell has been interpreted as the swept up ISM that is pushed aside by a bubble of relativistic gas inflated by the jet of Cyg X-1. Detecting the shock in soft X-ray and measuring its temperature and emission measure will allow us to confirm the jet-origin of the shell and, for the first time, to unambiguously measure the average jet power of Cyg X-1. In order to properly model and subtract the diffuse emission from the dust scattering halo and the wings of the PSF we also propose a simultaneous 5ksec RXTE observation of the point source. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 19:58:06.60 +35:20:08.00 Cygnus X-1 ACIS-I NONE 50.0000 ==========================================================================================

Proposal Number: 08400741
Proposal Title: Understanding the nature of high inclination low mass X-ray binaries: broad-band and line spectra from A1744-361 PI: Tod Strohmayer
Subject Category: BH AND NS BINARIES
Abstract: We propose to observe the transient dipping LMXB system A1744-361 during an outburst with Chandra HETGS, and contemporaneously with RXTE PCA. This will be the first observation of A1744-361 with a high resolution spectral instrument, and will facilitate; (1) sigficant detection of narrow spectral lines for the first time from A1744-361, (2) detection and line profile measurement of its broad iron emisson line, (3) unambiguous determination of source orbital period, (4) unambiguous determination of source position, (5) sigficant detection of kHz QPOs, and (6) understanding of the ionized plasma in the immediate environs of A1744-361, and dippers in general. These science goals rely on the unique qualities of Chandra (e.g., high spectral and angular resolution) and RXTE. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:48:13.10 -36:07:58.20 A1744-361 ACIS-S HETG 80.0000 ==========================================================================================

Proposal Number: 08400768
Proposal Title: Supergiant Fast X-ray Transients: New Candidates and Characterization of Quiescence PI: David Smith
Subject Category: BH AND NS BINARIES
Abstract: Supergiant fast x-ray transients (SFXTs) are a recently-discovered class of high-mass x-ray binary with extremely short, hard x-ray outbursts (lasting for hours) and blue supergiant companions. They are difficult to discover, so the class has only now begun to grow, based on monitoring of the Galactic plane by INTEGRAL and RXTE. Some of the systems contain pulsars; perhaps all contain neutron stars. Very little is known about the emission outside of outburst. Here we propose a systematic study of emission in quiescence (or at least in intervals chosen at random, which might also contain outbursts). We also propose brief pointings to discover or confirm the counterparts to several systems which are candidates for the SFXT class. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:21:46.90 -59:51:42.00 IGR J11215-5952 ACIS-S NONE 5.0000 12:47:35.00 -60:38:34.00 1A 1244-60 ACIS-I NONE 5.0000 17:49:06.00 -27:33:00.00 AX J1749.1-2733 ACIS-S NONE 5.0000 18:45:02.11 -04:33:55.08 AX 1845.0-0433 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08400783
Proposal Title: Monitoring Faint X-ray Transients in the Galactic Center PI: Frederick Baganoff
Subject Category: BH AND NS BINARIES
Abstract: We propose eight 5-ks ACIS-I observations of the SgrA* field to monitor the rate of faint X-ray transients in the central 25 pc of the Galaxy. This region contains 0.1% of the Galactic stellar mass, making it an ideal location for studying faint X-ray transients. In 6 years of Chandra observations, we have detected 7 transients with luminosities greater than 5e+33 erg/s, indicating that they are either HMXBs or LMXBs containing a black hole or neutron star. Remarkably, 4 of the transients are located within 1 pc of SgrA*, 20 times overabundant per unit stellar mass. This may be evidence for a cluster of several tens of thousands of black holes and neutron stars swarming around the Galactic supermassive black hole, as predicted by Morris (1993) and Miralda-Escude & Gould (2000). Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 5.0000 17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 5.0000 17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 5.0000 17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 5.0000 17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 5.0000 17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08400789
Proposal Title: Transient LMXBs in Globular Clusters: More Numerous Than We Thought? PI: David Pooley
Subject Category: BH AND NS BINARIES
Abstract: Since the discovery of globular cluster LMXBs in the 1970s, it was assumed that there was only one bright LMXB per cluster. Deep Chandra observations of several globular clusters have revealed that they contain numerous quiescent LMXB systems, any of which could go into outburst. Our observations will determine whether new outbursts from transient LMXBs in NGC 6440, Terzan 5, and Terzan 1 are from the same sources that were previously seen in outburst. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:35:47.20 -30:28:54.00 Terzan 1 ACIS-S NONE 10.0000 17:48:04.90 -24:46:45.00 Terzan 5 ACIS-S NONE 10.0000 17:48:52.70 -20:21:37.00 NGC 6440 ACIS-S NONE 2.5000 ==========================================================================================

Proposal Number: 08400850
Proposal Title: A Chandra HETGS Study of LMC X-4 : Binary Disk and Wind Properties and Studies of Grain Distribution at Small Angles PI: Julia Lee
Subject Category: BH AND NS BINARIES
Abstract: We propose a 150 ks (~ a binary period) HETGS observation of LMC X-4 at a median-to-high flux state to facilitate several independent science goals: (1) to study the physics of the companion wind feeding the disk, (2) to study the disk atmosphere and putative wind causing the super-orbital variation, and (3) to study small angle scattering of the X-ray halo to diagnose ISM grain properties (the line-of-sight position, size distribution and density of grains) in the LMC. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:32:49.80 -66:22:13.80 LMC X-4 ACIS-S HETG 150.0000 ==========================================================================================

Proposal Number: 08400891
Proposal Title: Confirming the Structure of the Nebular Trail of PSR J1614-2230 PI: Mallory Roberts
Subject Category: BH AND NS BINARIES
Abstract: The 3.15ms pulsar PSR J1614-2230 was discovered during a recent radio survey of unidentified EGRET gamma-ray sources. It is the first true millisecond pulsar detected with a companion whose minimum mass is as large as 0.4 solar masses. A short (5ks), exploratory XMM-Newton observation revealed it to be an X-ray source with an apparent extended nebular trail. Here we request a 20ks Chandra ACIS-S observation to image the structure of the nebular trail which will complement spectral studies to be performed with an already accepted deeper (50ks) observation by XMM-Newton. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:14:36.50 -22:30:31.20 PSR J1614-2230 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08400900
Proposal Title: Spectroscopy of a bright burst from 4U 1812-12 PI: Johannes in 't Zand
Subject Category: BH AND NS BINARIES
Abstract: Our goal is to measure with the HETGS a bright type-I X-ray burst with photospheric radius expansion (PRE), search for signatures of the ashes of nuclear burning and, if succesful, attempt a measurement of the gravitational redshift. The target, 4U 1812-12, is an ultracompact X-ray binary whose bursts are known to be consistently very bright, show strong PRE and are fairly predictable in occurrence. We request a joint RXTE observation to measure the neutron star spin via burst oscillations. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:15:06.20 -12:05:46.70 4U 1812-12 ACIS-S HETG 86.0000 ==========================================================================================

Proposal Number: 08400908
Proposal Title: Measuring the Distance and Dust Distribution to Cen X-3 with X-Ray Halo Variability PI: Thomas Thompson
Subject Category: BH AND NS BINARIES
Abstract: X-ray halos can provide information on interstellar grain properties (size, density, composition) and on the spatial distribution along the line of sight. Eclipsing X-ray binary systems, in particular, offer unique advantages, as the evolution of the halo following an abrupt eclipse is the easiest to model, and this variability can be used to measure the source distance. We propose to observe Cen X-3, beginning ~5 ks before eclipse egress and ending ~35 ks after eclipse egress. The X-ray halo variability will be used to determine the distance and dust distribution to Cen X-3, and will also probe the spatial relationship between gas and dust along the line of sight. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:21:15.80 -60:37:22.70 Cen X-3 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08400979
Proposal Title: X-raying the faintest black hole binaries PI: Elena Gallo
Subject Category: BH AND NS BINARIES
Abstract: We propose deep Chandra observations of two nearby quiecsent black hole binaries, in order to test whether 1e30 erg/sec is a limiting luminosity for short orbital period quiescent systems. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:50:01.00 -49:57:45.00 XTE J1650-500 ACIS-S NONE 37.0000 ==========================================================================================

Proposal Number: 08400982
Proposal Title: From Super-Eddington to zero: following a Z source into quiescence PI: Jeroen Homan
Subject Category: BH AND NS BINARIES
Abstract: XTE J1701-462 is likely the most luminous Galactic transient neutron star LMXB (NSXB) in the history of X-ray astronomy. Early observations have already challenged our view on the role of mass accretion rate in NSXBs. Observing XTE J1701-462 as it returns to quiescence creates a unique opportunity to study the effects of mass-accretion rate on the spectral/variability properties in a single NSXB over an unprecedented luminosity range. We propose a Chandra/XMM-Newton TOO program with two goals: 1) observe the source during the end of the decay and in quiescence, to complete what might well become a 'Rosetta stone' for NSXBs and 2) constrain the structure of neutron stars by studying the effects of super-Eddington accretion on the cooling of the crust/core in transient NSXBs. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 5.0000 17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 10.0000 17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 20.0000 17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 30.0000 17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08401029
Proposal Title: Localization and Spectra of INTEGRAL-Selected Sources in the Galactic Plane PI: John Tomsick
Subject Category: BH AND NS BINARIES
Abstract: The INTEGRAL satellite is discovering a large number of new hard X-ray sources in the Galactic plane. In most cases, the few arcminute INTEGRAL positions do not allow for identification of these IGR sources at other wavelengths, leaving their nature unclear. Chandra can make a major contribution to studies of IGR sources by localizing the sources to allow for the identification of multi-wavelength counterparts and by constraining their soft X-ray spectra. Many of the IGR sources that have been identified are High-Mass X-ray Binaries (HMXBs) with interesting properties. We propose for relatively short Chandra observations of 20 unidentified IGR sources in the Galactic plane to search for HMXBs or other unusual Galactic sources. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:23:24.00 +61:41:31.20 IGR J00234+6141 ACIS-S NONE 5.0000 01:36:18.00 +66:10:37.20 IGR J01363+6610 ACIS-S NONE 5.0000 06:07:24.00 +22:04:58.80 IGR J06074+2205 ACIS-S NONE 5.0000 09:02:33.10 -48:11:45.60 IGR J09026-4812 ACIS-S NONE 5.0000 10:10:07.80 -56:54:46.40 IGR J10101-5654 ACIS-S NONE 5.0000 11:30:30.00 -62:55:51.60 IGR J11305-6256 ACIS-I NONE 5.0000 11:43:52.00 -61:08:60.00 IGR J11435-6109 ACIS-S NONE 5.0000 14:51:32.90 -55:42:16.20 IGR J14515-5542 ACIS-S NONE 5.0000 17:20:05.30 -31:17:24.00 IGR J17200-3116 ACIS-S NONE 5.0000 17:28:41.30 -29:22:55.20 IGR J17285-2922 ACIS-S NONE 5.0000 17:33:08.00 -24:06:46.10 IGR J17331-2406 ACIS-S NONE 5.0000 17:40:42.00 -28:07:58.80 IGR J17407-2808 ACIS-S NONE 5.0000 17:44:31.70 -27:46:58.80 IGR J17445-2747 ACIS-S NONE 5.0000 17:50:44.00 -28:56:17.20 IGR J17507-2856 ACIS-S NONE 5.0000 18:19:16.80 -25:42:10.80 IGR J18193-2542 ACIS-S NONE 5.0000 18:21:21.60 -13:18:28.80 IGR J18214-1318 ACIS-S NONE 5.0000 18:25:37.40 -10:35:13.20 IGR J18256-1035 ACIS-S NONE 5.0000 18:25:56.40 -07:06:21.60 IGR J18259-0706 ACIS-S NONE 5.0000 18:32:28.30 -07:56:24.00 IGR J18325-0756 ACIS-S NONE 5.0000 18:53:54.50 +07:27:28.80 IGR J18539+0727 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08401035
Proposal Title: Faint persistent X-ray sources in the Galactic Bulge PI: Marc Klein-Wolt
Subject Category: BH AND NS BINARIES
Abstract: We propose short (1 ksec) observations with the HRC-I of a selection of faint persistent X-ray sources in the Galactic Bulge for which very little is know. These sources are detected in the PCA/RXTE bulge scan project at luminosities below 10^36 erg/sec and are most likely HMXB or LMXB; they are either Be/X-ray binaries, and hence candidates to show slow X-ray pulsations, or they are ultra-compact binaries in which the compact object is accreting from a degenarate donor and in which case they are candidates to show gravitational waves. The HRC observations will allow us to search for slow pulsations as well give for the first time an accurate position that will allow for optical/IR follow-up studies to determine the binary parameters. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:10:12.00 -28:07:05.90 XTE J1710-281 HRC-I NONE 1.0000 17:12:34.10 -37:38:35.90 SAX J1712.6-3739 HRC-I NONE 1.0000 17:17:25.60 -40:45:43.90 XTE J1717-407 HRC-I NONE 1.0000 17:28:37.70 -29:09:25.20 XTE J1728-295 HRC-I NONE 1.0000 17:33:08.00 -24:06:46.10 IGR J17331-2406 HRC-I NONE 1.0000 17:44:08.40 -23:07:19.20 XTE J1744-230 HRC-I NONE 1.0000 17:52:48.00 -28:00:00.00 XTE J1752-280 HRC-I NONE 1.0000 18:05:37.10 -29:31:15.20 XTE J1805-295 HRC-I NONE 1.0000 18:08:24.50 -23:09:17.60 RXS J180824.5 HRC-I NONE 1.0000 18:12:48.00 -23:00:00.00 XTE J1812-230 HRC-I NONE 1.0000 18:38:01.00 -06:55:55.20 AXJ183800-0655 HRC-I NONE 1.0000 ==========================================================================================

Proposal Number: 08401042
Proposal Title: Spitzer-Chandra ToO Observations of a Short/Hard GRB PI: Kevin Hurley
Subject Category: BH AND NS BINARIES
Abstract: We propose an ambitious multiwavelength approach to the short GRB mystery, leveraging Spitzer with Chandra as well as numerous ground-based telescopes. By measuring the broad-band spectrum of the afterglow and any concurrent "mini-supernova" over a wide range of wavelengths at several epochs, we can distinguish between models proposed to explain this type of burst. We will constrain the energetics of the explosion, constrain the short GRB bursting rate (an important number for gravitational wave observatories), and measure with unprecedented detail the stellar content of a short burst host galaxy. Given the high impact nature of these observations and the rarity of short bursts, we are requesting multiepoch ToO observations on a single event in Spitzer Cycle 3/Chandra Cycle 8. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Short GRB ACIS-S NONE 10.0000 Short GRB ACIS-S NONE 20.0000
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SN, SNR AND ISOLATED NS
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Proposal Number: 08500003
Proposal Title: A new magnetar in a young supernova remnant PI: Bryan Gaensler
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Anomalous X-ray Pulsars (AXPs) are an exotic population of pulsating X-ray sources, which are now thought to be highly magnetized neutron stars ("magnetars"). However, the evolution, demography, and relation of magnetars to other types of neutron star are all not yet understood. We have identified a new candidate association between an AXP and a young supernova remnant (SNR), for which we propose XMM and Chandra observations. These data can confirm our AXP and SNR identifications, and can thus help constrain the origin, evolution and physical properties of the magnetar population. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 15:50:54.00 -54:18:25.20 1E 1547.0-5408 ACIS-I NONE 10.0000 ==========================================================================================

Proposal Number: 08500010
Proposal Title: A Search for Jet Breaks in Long GRB afterglows PI: Gordon Garmire
Subject Category: SN, SNR AND ISOLATED NS
Abstract: In the standard 'fireball' model for GRB afterglows, the jet opening angle can be determined from the jet break time. Previous studies have found jet break times of the order of a few days, implying jet angles of < 5 degrees. Surprisingly, the X-ray light curves observed by Swift seem to be in conflict with earlier results, with no observable jet break for many bursts in the first 10 days. This implies far less collimation than previously thought, and has a strong impact on the derived explosion energies. In order to search for late jet breaks, we propose to follow 4 carefully chosen GRB afterglows with late-time observations by Chandra. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- GRB xxxxxx ACIS-S NONE 12.0000 GRB xxxxxx ACIS-S NONE 12.0000 GRB xxxxxx ACIS-S NONE 12.0000 GRB xxxxxx ACIS-S NONE 12.0000 GRB xxxxxx ACIS-S NONE 25.0000 GRB xxxxxx ACIS-S NONE 25.0000 GRB xxxxxx ACIS-S NONE 25.0000 GRB xxxxxx ACIS-S NONE 25.0000 GRB xxxxxx ACIS-S NONE 50.0000 GRB xxxxxx ACIS-S NONE 50.0000 GRB xxxxxx ACIS-S NONE 50.0000 GRB xxxxxx ACIS-S NONE 50.0000 ==========================================================================================

Proposal Number: 08500019
Proposal Title: The very old nearby pulsar J0108-1431 PI: Gordon Garmire
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to image the field around PSR J0108-1431 to detect this very old pulsar or determine an upper limit on its X-ray flux. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:08:08.30 -14:31:48.50 PSR J0108-1431 ACIS-I NONE 30.0000 ==========================================================================================

Proposal Number: 08500022
Proposal Title: X-ray Emission from the Planet Pulsar PI: Gordon Garmire
Subject Category: SN, SNR AND ISOLATED NS
Abstract: PSR 1257+12 is the famous millisecond pulsar with a planetary system. We observed this pulsar with Chandra in 2005 and detected a surprisingly low X-ray flux. A possible interpretaion of the the low flux is that the pulsar's X-rays are absorbed by clouds of circumpulsar matter orbiting the pulsar. To check this hypothesis, we propose to monitor the pulsar with Chandra. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 13:00:03.00 +12:40:57.30 PSR B1257+12 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08500023
Proposal Title: Chandra monitoring of the candidate Anomalous X-ray Pulsar AX J1845-0258 PI: Gordon Garmire
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to monitor the flux of the transient Anomalous X-ray Pulsar candidate AX J1845-0258 with Chandra ACIS. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:44:54.60 -02:56:53.00 AX J1845-0258 ACIS-I NONE 5.0000 18:44:54.60 -02:56:53.00 AX J1845-0258 ACIS-I NONE 5.0000 18:44:54.60 -02:56:53.00 AX J1845-0258 ACIS-I NONE 5.0000 18:44:54.60 -02:56:53.00 AX J1845-0258 ACIS-I NONE 5.0000 18:44:54.60 -02:56:53.00 AX J1845-0258 ACIS-I NONE 5.0000 18:44:54.60 -02:56:53.00 AX J1845-0258 ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08500024
Proposal Title: NEARBY RECYCLED PULSAR J1909-3744 PI: Gordon Garmire
Subject Category: SN, SNR AND ISOLATED NS
Abstract: PSR J1909-3744 is expected to be among the top five X-ray brightest recycled pulsars. Its proximity and relatively high spin-down power make it a promising target for studying the X-ray properties of very old recycled pulsars including thermal radiation from hot polar caps and non-thermal radiation from magnetospheres. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 19:09:47.50 -37:44:14.20 PSR J1909-3744 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08500044
Proposal Title: Exploring the center-filled SNR G67.7+1.8 PI: Peter Predehl
Subject Category: SN, SNR AND ISOLATED NS
Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 19:54:26.00 +31:28:54.00 G67.7+1.8 ACIS-I NONE 30.0000 ==========================================================================================

Proposal Number: 08500045
Proposal Title: High resolution investigation of possible cyclotron absorption line harmonics from RX J1605.3+3249 PI: Peter Predehl
Subject Category: SN, SNR AND ISOLATED NS
Abstract: RX J1605.3+3249 is member of a class of isolated neutron stars which show a thermal X-ray spectrum. Broad absorption lines in the X-ray spectra of most of these objects were discovered which is interpreted as resonant absorption at the proton cyclotron energy. EPIC-pn spectra show strong evidence for harmonic absorption lines with energy ratios of 2:3:4 with the lowest-energy line at ~400 eV. We propose to use the unique low energy capability of the LETGS in order to confirm the multiple absorption lines and their expected fundamental at 200 eV. The detection of harmonic lines would be unique among the isolated neutron stars with purely thermal emission and extremely important for understanding their underlying physical mechanisms. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:05:18.50 +32:49:18.00 RX J1605.3+3249 HRC-S LETG 100.0000 ==========================================================================================

Proposal Number: 08500060
Proposal Title: HETG Spectroscopy of the Crab Pulsar and the Interstellar Medium PI: Claude Canizares
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a 50 ks HETG-ACIS observation of the Crab pulsar. The excellent ACIS spatial resolution will enable us for the first time to obtain a "clean" grating spectrum of the pulsar itself. Although we will obtain an image of the pulsar, it will be pilled-up, as our observing strategy is to obtain a high quality grating spectrum. Rather, we intend to verify the evidence for an expanding remnant shell that has been marginally detected in the existing calibration observations. The proposed observation will also allow us to study the X-ray Absorption Fine Structure in the interstellar medium. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:34:31.90 +22:00:52.10 Crab Pulsar ACIS-S HETG 50.0000 ==========================================================================================

Proposal Number: 08500065
Proposal Title: High resolution spectral imaging of SN 1987A at 20 years: HETG observation PI: Claude Canizares
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose deep, high-resolution observations of SN 1987A at ~ 20 years after its explosion. Here we use 270 ks of HETGS observation time to provide the highest-resolution spectra of this target over the band from the O VII triplet (~ 0.55 keV, 22 A) to the Fe-K line region (~ 6-7 keV, 1.9 A). Because SN 1987A is brightening at an accelerating rate we will obtain several hundred counts in individual line-images, e.g., Si XIII and Ne X lines. To maximize the science value of these data, we are teaming on a parallel proposal (McCray, P.I.) to obtain a similarly deep LETG/ACIS data set. With the full set of deep line-images - over a range of 5 in dispersion and a a range of ~4 in wavelength - we can do detailed fitting of spatial-velocity-ionization models of SN 1987A. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:35:28.00 -69:16:11.00 Sn 1987A ACIS-S HETG 50.0000 05:35:28.00 -69:16:11.00 Sn 1987A ACIS-S HETG 160.0000 05:35:28.00 -69:16:11.00 Sn 1987A ACIS-S HETG 160.0000 ==========================================================================================

Proposal Number: 08500067
Proposal Title: Chandra Search for Young Neutron Stars PI: Stephen Murray
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a search for young, active neutron stars, their nebulae, and associated supernova remnants based on a list of candidate sources whose emission in other wavelength bands is consistent with such an origin. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:40:47.60 -46:31:60.00 HESS J1640-465 ACIS-I NONE 30.0000 ==========================================================================================

Proposal Number: 08500140
Proposal Title: The Puzzling Pulsar-Wind Nebula of the Geminga Pulsar PI: George Pavlov
Subject Category: SN, SNR AND ISOLATED NS
Abstract: XMM and Chandra observations have shown a unique structure around the Geminga pulsar. The XMM images show two 2'-long, patchy tails extended in the direction opposite to the pulsar's proper motion. Our observation with Chandra ACIS revealed a 20''-long axial tail behind the moving pulsar and an arc-like structure 5''-7'' ahead of the pulsar. The tail could be a pulsar jet or a shocked pulsar wind confined by the ram pressure of the oncoming medium. The arc could be the head of a bow shock or a torus of the shocked equatorial pulsar wind. In the shallow ACIS image there is no clear connection between these small-scale structures and the long tails seen in the XMM images. The proposed deep observation will establish this connection and allow us to understand the nature of the whole nebula. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 06:33:54.20 +17:46:12.90 Geminga ACIS-I NONE 80.0000 ==========================================================================================

Proposal Number: 08500177
Proposal Title: Can We Observe the SGR to AXP Transition in Real Time? PI: C. Wilson
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs) are both believed to be magnetars powered by the decay of their strong magnetic fields. Within the last 8 years, giant flares have been recorded from two Soft Gamma Repeaters, SGR 1900+14 and SGR 1806-20. During these flares, the external field is significantly altered creating measureable changes in the persistent X-ray flux, energy spectrum and burst activity. These changes point toward a reduction in magnetospheric currents that may hasten the transition from an SGR-like state to an AXP-like state on a time scale of years. Here, we propose to observe each of these SGRs to monitor this transition and constrain the physical impact of giant flares on the underlying X-ray source and probe the flare mechanism itself. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 19:07:14.30 +09:19:20.10 SGR 1900+14 ACIS-S NONE 12.5000 19:07:14.30 +09:19:20.10 SGR 1900+14 ACIS-S NONE 12.5000 ==========================================================================================

Proposal Number: 08500205
Proposal Title: New Developments from the Transient AXP XTE J1810-197 PI: JULES HALPERN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The 5.5 s pulsar XTE J1810-197 is the first confirmed Transient Anomalous X-ray Pulsar (TAXP). It has been fading steadily since its only known outburst in 2003. Archival data spanning 25 yr indicates that this is likely a one-time event. Monitoring of its complex spectrum and pulse profiles during the decay is revealing a wealth of information about emission mechanisms and geometry of a magnetar. Surprising radio brightening, 1-3 years after outburst, is unique to this AXP, and suggests either an expanding nebula or transient radio bursts. During AO8, we expect the X-ray spectrum and pulse modulation to change markedly as the source returns to its quiescent state. We propose to follow its flux, spin, and spectral evolution, and search for a radio and X-ray nebula. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08500247
Proposal Title: ToO Observations of Isolated Neutron Stars PI: Peter Woods
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Phase-coherent timing solutions for two Isolated Neutron Stars (INSs) were recently established and the inferred magnetic field strengths are intermediate between ordinary radio pulsars and magnetars. Interestingly, strong timing noise, spectral variability, and pulse morphology changes were observed in RX J0720.4-3125 -- characteristics commonly seen in magnetars. Given the strong timing noise seen in this object, there is a reasonable expectation that it may glitch. Transient flux variability may also be seen if the X-ray emission is powered by magnetic dissipation. Here, we propose a sequence of ToO observations should either source glitch or change brightness by more than 50%. These observations will allow us to establish a new timing solution and/or quantify spectral changes. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 07:20:25.00 -31:25:49.60 RX J0720.4-3125 ACIS-S NONE 5.0000 07:20:25.00 -31:25:49.60 RX J0720.4-3125 ACIS-S NONE 5.0000 07:20:25.00 -31:25:49.60 RX J0720.4-3125 ACIS-S NONE 5.0000 07:20:25.00 -31:25:49.60 RX J0720.4-3125 ACIS-S NONE 10.0000 13:08:48.30 +21:27:06.80 RX J1308.6+2127 ACIS-S NONE 5.0000 13:08:48.30 +21:27:06.80 RX J1308.6+2127 ACIS-S NONE 5.0000 13:08:48.30 +21:27:06.80 RX J1308.6+2127 ACIS-S NONE 5.0000 13:08:48.30 +21:27:06.80 RX J1308.6+2127 ACIS-S NONE 10.0000 ==========================================================================================

Proposal Number: 08500282
Proposal Title: Complex PWN Torus and Jets from a Gamma-ray Pulsar PI: Roger Romani
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a deep ACIS image of the PWN discovered around PSR J2021+3651 in a short AO4 observation. The nebula of this energetic pulsar is interesting as it seems to show the complex `double torus' structure only previously seen clearly around Vela. The pulsar itself is also interesting as it is a probable gamma-ray source, yet the large radio pulsar DM distance implies an enormous efficiency. The proposed deep imaging campaign addresses these issues, allowing both geometrical and spectral tests of the pulsar distance and measuring the PWN equatorial tori and jets in sufficient detail to allow comparison with pulsar wind models. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:21:04.50 +36:51:27.00 PSR J2021+3651 ACIS-S NONE 100.0000 ==========================================================================================

Proposal Number: 08500333
Proposal Title: CHANDRA OBSERVATIONS OF YOUNG ENERGETIC SUPERNOVAE PI: David Pooley
Subject Category: SN, SNR AND ISOLATED NS
Abstract: In the entire history of X-ray astronomy, only about two dozen core-collapse supernovae (SNe) have been detected at ages of days to years old. Of these, only a handful have been well-followed temporally. Few general trends have emerged, and there is a clear need for better X-ray coverage at ages of ~years. Two SN subclasses stand out as deserving of particular attention, namely, the type Ic SNe, which have been associated with long-duration gamma-ray bursts, and the type IIn SNe, which are very poorly understood but have the highest X-ray luminosities seen in SNe. We propose observations of a number of interesting SNe of these subclasses at ages between one and five years. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:41:26.80 +25:29:51.60 SN 2005db ACIS-S NONE 3.0000 03:21:39.70 +16:52:01.80 SN 2006aj ACIS-S NONE 20.0000 04:10:59.40 -31:24:50.30 SN 2003bg ACIS-S NONE 35.0000 11:27:29.70 +56:52:48.20 SN 2004C ACIS-S NONE 60.0000 13:50:25.00 +68:33:19.40 SN 2005bx ACIS-S NONE 13.0000 21:42:23.70 +12:29:50.90 SN 2001em ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08500339
Proposal Title: Astrometric Study of Isolated Neutron Stars PI: Christian Motch
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to take advantage of the excellent imaging performance of Chandra to measure the proper motion of the X-ray bright and radio-quiet isolated neutron star RX J1308.6+2127 with the goal to constrain its space velocity, birth place and age. The five year time interval between the proposed Cycle 8 and former Cycle 3 observations obtained by our group will provide a very sensitive measurement. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 13:08:48.20 +21:27:06.80 RX J1308.6+2127 ACIS-I NONE 20.0000 ==========================================================================================

Proposal Number: 08500365
Proposal Title: ToO Observations of Soft Gamma Repeaters PI: Peter Woods
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Soft Gamma Repeaters are rare sources of transient burst emission, probably magnetars (i.e. strongly magnetized neutron stars). Each of the SGRs has a persistent X-ray counterpart and some show coherent pulsations. During burst active phases, these counterparts undergo changes in their energy spectrum and pulse properties. Measuring the effects of burst activity are diagnostic of the burst mechanism and SGRs in general. In the event of detection of substantial burst activity from an SGR, we propose to make Chandra ToO observations of any of the four known sources, SGR 1900+14, SGR 1806-20, SGR 1627-41, SGR 0526-66, the SGR candidate SGR 1801-23, as well as any newly discovered SGR source. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- NEW SGR ACIS-I NONE 5.0000 NEW SGR ACIS-S NONE 40.0000 05:26:01.10 -66:04:38.00 SGR 0526-66 ACIS-S NONE 40.0000 16:35:51.80 -47:35:23.30 SGR 1627-41 ACIS-S NONE 40.0000 18:00:58.90 -22:56:48.50 SGR 1801-23 ACIS-S NONE 40.0000 18:08:39.30 -20:24:39.50 SGR 1806-20 ACIS-S NONE 40.0000 19:07:14.30 +09:19:20.10 SGR 1900+14 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08500437
Proposal Title: X-rays from the unusual relativistic binary J1906+0746 PI: Oleg Kargaltsev
Subject Category: SN, SNR AND ISOLATED NS
Abstract: PSR J1906+0746 is a recently discovered pulsar in a tight binary (orbital period 3.98 hours) where the second component is either a heavy WD or a NS. The binary is unique because PSR J1906+0746 is young and energetic compared to the pulsars in other tight NS-NS or NS-WD binaries. It has been suggested that in such binaries the interaction between the pulsar wind and the companion can significantly enchance X-ray emission and result in variability with orbital phase. J1906+0746 is an ideal system for testing this hypothesis. We propose an exploratory observation to measure the fluxes of different emission components, resolve the extended PWN and search for variability with orbital phase. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 19:06:48.70 +07:46:28.60 PSRJ1906+0746 ACIS-I NONE 32.0000 ==========================================================================================

Proposal Number: 08500515
Proposal Title: A search for fast periodicity in the enigmatic X-ray source inside RCW103. PI: Andrea De Luca
Subject Category: SN, SNR AND ISOLATED NS
Abstract: 1E161348-5055 is a compact, radio-quiet X-ray source lying at the center of the 2000-year old supernova remnant RCW103. Its original identification as an isolated neutron star was questioned in recent years by the detection of long-term flux variations. A very recent, long XMM-Newton observation performed in August 2005 by our group led to the unambiguous evidence of a 6.67 hours periodicity, settling the case for a unique phenomenology. 1E161348-5055 cannot be easily identified with any currently known class of X-ray sources. Here we ask for an 80 ks observation with Chandra/HRC-S in Timing mode. The unique combination of angular and time resolution will allow to perform the first sensitive search for fast (P<20 ms) pulsations from the source, a search only possible with Chandra. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:17:36.20 -51:02:25.00 1E 161348-5055 HRC-S NONE 80.0000 ==========================================================================================

Proposal Number: 08500520
Proposal Title: SPATIALLY RESOLVED LETG SPECTROMETRY OF SNR1987A PI: Richard McCray
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We will obtain a spatially resolved LETG spectrum of the newborn supernova remnant SNR1987A. This observation will complement a 270 ks GTO observation of SNR1987A with the HETG. The proposed observations will provide spatial information to interpret the HETG observations and will measure the spectrum at wavelengths > 15 A where the HETG lacks sensitivity. With a projected source > 3 times brighter than it was during our Cycle 5 observation, we will be able to measure for the first time how the temperature distribution and kinematic velocity of the shocked gas has changed and how these parameters vary spatially around the ring-like source. The proposed observation is part of a large multi-wavelength campaign of observations with Spitzer, HST, and ground-based observatories. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:35:28.00 -69:16:11.10 SNR1987A ACIS-S LETG 140.0000 05:35:28.00 -69:16:11.10 SNR1987A ACIS-S LETG 160.0000 ==========================================================================================

Proposal Number: 08500575
Proposal Title: A Search for Jet Breaks in Short Gamma-Ray Bursts PI: David Burrows
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Understanding the energetics of short GRBs requires knowledge of the jet beaming factors. Short GRB afterglows are monitored routinely by the Swift X-ray Telescope (XRT), but the XRT has not clearly detected a jet break from any short GRB. The implication is that the jet breaks are occurring at late times and at fluxes below the XRT sensitivity. We propose to trigger Chandra ToOs for two short GRBs, carefully selected to maximize the chance to detect late jet breaks with Chandra, as we did in AO7 on GRB 051221A. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- SGRB #1 ACIS-S NONE 33.0000 SGRB #1 ACIS-S NONE 53.0000 SGRB #2 ACIS-S NONE 33.0000 SGRB #2 ACIS-S NONE 53.0000 ==========================================================================================

Proposal Number: 08500626
Proposal Title: A Better Mousetrap: Localizing RRATs with Chandra PI: SHAMIBRATA CHATTERJEE
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Rotating RAdio Transients (or RRATs) are a recently discovered class of neutron stars with largely unknown properties. Unlike normal pulsars, they do not show coherent pulsation but instead emit sporadic radio bursts that nevertheless show evidence for stable rotation. Of the 11 known RRATs, 8 have positions that are only known to 7 arcmin, inhibiting any follow-up observations. Building on our serendipitous Chandra detection of an RRAT, we propose to utilize the high resolution of Chandra to localize a sample of RRATs to sub-arcsecond precision. By measuring the positions and X-ray characteristics of these objects, we will place them in the context of the larger neutron star population, and pave the way for more detailed radio, optical, IR, and X-ray observations. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:48:00.00 -43:16:00.00 J0848-43 ACIS-I NONE 10.0000 17:53:60.00 -30:10:60.00 J1754-30 ACIS-I NONE 10.0000 18:26:00.00 -14:26:60.00 J1826-14 ACIS-I NONE 10.0000 18:48:00.00 -12:46:60.00 J1848-12 ACIS-I NONE 10.0000 19:11:00.00 +00:37:00.00 J1911+00 ACIS-I NONE 10.0000 ==========================================================================================

Proposal Number: 08500657
Proposal Title: A Star Cluster as a Supernova Factory PI: Michael Muno
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Massive star clusters are ideal objects for X-ray studies of two related subjects: the effect of stellar winds and supernovae on the interstellar medium, and the mapping between the initial masses of stars and the compact objects that they leave behind. We propose to observe a Galactic star cluster containing a dozen red supergiants, which implies an age of 6-15 Myr, a mass of 20,000-50,000 Msun, and a supernova rate of at least one per 90,000 years. This cluster provides a unique opportunity to understand how supernova remnants interact with a cool cluster wind produced by red supergiants. Chandra observations will allow us to search for isolated neutron stars and high-mass X-ray binaries. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:39:19.90 -06:01:45.70 RSG Cluster 2 ACIS-I NONE 40.0000 ==========================================================================================

Proposal Number: 08500675
Proposal Title: High-Resolution Soft X-ray Spectroscopy of a Gamma-ray Burst X-ray Afterglow PI: Masao Sako
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a deep TOO observation of a bright X-ray afterglow of a gamma-ray burst using the Chandra LETG/ACIS-S. The trigger will be based primarily on the X-ray flux, which will be monitored with the X-ray Telescope on board the Swift observatory. An additional constraint on the line-of-sight Galactic column density will be imposed as well to provide the highest statistical-quality grating spectrum of a GRB X-ray afterglow. These criteria, which is based on our detailed study of the currently-available datasets in the archive, maximizes the chances of detecting and identifying discrete X-ray features from the circumburst environment, which will provide us with important clues about the nature of the progenitor. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Swift GRB TOO ACIS-S LETG 120.0000 ==========================================================================================

Proposal Number: 08500680
Proposal Title: Nailing Down the Broadband Properties of a Short GRB with the help of Chandra PI: Nathaniel Butler
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Understanding of the origin and nature of short/hard Gamma-ray bursts (SHBs) is one of the last frontiers of GRB research. We propose a 3 epoch ToO observations of one SHB, as part of a broadband followup campaign. We hope to decisively answer the following questions: Do the afterglows of SHBs arise from external shocks? What are the explosion energy, external density, and micro-physical parameters? In what environments do SHBs occur, galaxy clusters? Are the afterglows isotropic, and what is the SHB rate? What drives the X-ray flaring, which apparently occurs many dynamical timescales after a putative compact object merger? These observations complement (but do not duplicate) a joint Chandra/Spitzer ToO observation of one SHB, proposed in the 3rd GO Spitzer round. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Short /hard GRB ACIS-S NONE 10.0000 Short /hard GRB ACIS-S NONE 20.0000 Short /hard GRB ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08500683
Proposal Title: The Proper Motion of Supernova Remnant E0509-67.5 PI: John Hughes
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to measure independently the proper motion expansions of the ejecta and forward shock in E0509-67.5. The metal-enriched reverse-shock-heated ejecta emits only in X-rays, while the forward shock is traced to high precision by H alpha emission. The proposed measurements require the unique high resolution imaging capabilities of Chandra and Hubble. The optical (forward shock) and X-ray (ejecta) results will yield important constraints on the remnant's evolutionary state; we will search in particular for evidence of cosmic-ray modified dynamics. An important component of this project is an integrated theoretical investigation using realistic models of SN Ia explosions evolved to the remnant stage. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:09:31.90 -67:31:17.00 0509-67.5 ACIS-S NONE 63.0000 ==========================================================================================

Proposal Number: 08500693
Proposal Title: Chandra Monitoring of SNR 1987A in AO8 PI: David Burrows
Subject Category: SN, SNR AND ISOLATED NS
Abstract: SNR1987A provides a unique opportunity to study the development of a young supernova remnant at high resolution. We have monitored SN/SNR1987A at roughly six month intervals since October 1999. The remnant is expanding and is increasing exponentially in X-ray brightness. We propose to continue this monitoring program with two additional observations in AO8, spaced six months apart. The remnant is now bright enough that these observations will permit spatially-resolved spectra in addition to monitoring the expansion (which has recently begun to slow) and the development of new X-ray hot spots. We will also continue our search for a compact central object, which may become visible in the near future as the ejecta become optically thin. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 31.0000 05:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 38.0000 ==========================================================================================

Proposal Number: 08500718
Proposal Title: G266.2-1.2: Uncovering the Nature of the South Rim PI: Paul Plucinsky
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a deep Chandra pointing at the south rim of the Galactic supernova remnant G266.2-1.2. This Chandra observation will resolve the structure of a nonthermal filament and also explore the morphology of a diffuse feature which is apparently over-abundant in O, Ne, and Mg. We will compare this high-resolution image to the nonthermal filament in the NW rim. We will determine the upstream and downstream scale widths of the filament from the image and determine the cut-off frequency of the synchrotron emission from the spectra. These values will then be interpreted in the context of the Diffuse Shock Acceleration models to constrain the amplification of the magnetic field, the cosmic ray acceleration efficiency, and the maximum energy of the particles. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:53:17.00 -47:20:06.00 G266.2-1.2 South ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08500758
Proposal Title: A Deep Chandra Observation of the Tycho Supernova Remnant PI: John Hughes
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to obtain a very deep observation of the Tycho supernova remnant. Our observational goals include measuring the angular expansion of the forward shock and contact discontinuity, investigating the nature and origin of Fe-rich ejecta knots, and studying the spectral structure of the forward shock. For the expansion measurement we will compare to an existing Chandra observation taken in cycle 4 that was specifically optimized for subsequent expansion measurements. Tycho is the ideal remnant for studies of cosmic-ray modified dynamics and investigating key features of Type Ia supernova physics. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:25:19.00 +64:08:10.00 Tycho's SNR ACIS-I NONE 150.0000 ==========================================================================================

Proposal Number: 08500775
Proposal Title: FURTHER IMAGING OF RPWN IN VARIABLE GAMMA-RAY ERROR BOXES PI: Mallory Roberts
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to obtain deeper images of two pulsar wind nebulae coincident with variable gamma-ray sources. Short, exploratory observations of these sources with Chandra, along with their radio properties, suggest they are RPWN with possible forward bow-shocks seen in X-rays. These new observations will determine the fine structure of the nebulae, allow meaningful spectral constraints on sub-components, and provide baseline images for future variability studies concurrent with gamma-ray observations by AGILE and GLAST. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:18:39.80 -60:57:56.00 Rabbit ACIS-I NONE 75.0000 18:26:08.40 -12:56:38.00 3EG J1826-1302 ACIS-I NONE 75.0000 ==========================================================================================

Proposal Number: 08500791
Proposal Title: An expansion measurement of RCW 86: is it the remnant of SN185? PI: Jacco Vink
Subject Category: SN, SNR AND ISOLATED NS
Abstract: RCW 86 is one of a few SNRs emitting X-ray synchrotron radiation. This is surprising, given that shock velocities have been measured of only V~600 km/s. For those velocities standard shock acceleration theory does not predict X-ray synchrotron radiation. Based on a previous Chandra observation we argue that in regions with X-ray synchrotron radiation the shock speed is higher (V~3000 km/s), and that large differences in velocities are caused by an evolution inside a wind blown bubble: parts of the SNR inside the bubble still have a high shock velocity, whereas the bright parts are where the shock has reached the bubble shell. Interestingly, this would make the age of RCW 86 consistent with an explosion in AD185. We propose a 75ks observation for directly measuring the expansion. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:45:02.30 -62:20:32.00 RCW 86 NE ACIS-S NONE 75.0000 ==========================================================================================

Proposal Number: 08500956
Proposal Title: In-depth Study of the Nearest Engine-Driven Cosmic Explosions PI: Shrinivas Kulkarni
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Just a decade ago, astronomers thought stellar collapse was primarily a spherical process. Gamma-ray bursts, with their powerful jets (powered by a central engine) and at the same time a spherical explosion (supernova) have upset this paradigm. Empirically there appears to be a wide range in the energy of the spherical explosion and the jets. This opens up the possibility that the spherical+engine framework is the correct paradigm for all explosions. Here we propose an in-depth study of the nearest core-collapse events which show evidence for a central engine (e.g. SN 1998bw and the nearest GRBs). Our synergistic multi-wavelength effort (radio, optical and proposed Chandra observations) are designed to study both the spherical and the jet components under this framework. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Target1 ACIS-S NONE 20.0000 Target1 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08500961
Proposal Title: Searching for X-ray variability in Rotating Radio Transients PI: Nanda Rea
Subject Category: SN, SNR AND ISOLATED NS
Abstract: RRATs are a recently found class of probable neutron stars characterised by highly energetic transient radio bursts. Our group recently discovered the first counterpart of one of these sources: RRAT 1819-1458. With the present proposal we ask for a Chandra observation of this X-ray counterpart in order to search for possible flux and spectral variability to shed more light on the nature of this new puzzling class of objects. Furthermore we want to search for possible extended X-ray emission around the source. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 18:19:33.00 -14:58:16.00 RRAT J1819-1458 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08501008
Proposal Title: Probing the Relativistic Winds of Millisecond Pulsars PI: Zaven Arzoumanian
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe three millisecond radio pulsars to search for X-ray-bright "tails" or other nebulosity arising from the interaction of the pulsar winds with the ambient medium. Our proposed observation, while doubling the number of MSPs observed with Chandra, will provide new insights into the nature of winds from recycled neutron stars, the energetics and magnetic structure of MSP magnetospheres, and their role in sculpting the interstellar medium. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:44:29.30 -11:34:54.60 PSR J1744-1134 ACIS-S NONE 65.0000 ==========================================================================================

Proposal Number: 08501014
Proposal Title: Tiny Hiccups To Titanic Explosions: Tackling Transients in Anomalous X-ray Pulsars PI: Victoria Kaspi
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Recently discovered transient events in Anomalous X-ray Pulsars (AXPs) may be a Rosetta Stone for understanding the persistent emission from magnetars. They also may hold the key to quantifying the number of magnetars in the Galaxy. Here we request Chandra TOO time to observe any AXP following a rare transient event, including a major outburst or a long-duration flare. Specifically, the requested observations will determine the pulsed fraction and spectral evolution of a transient AXP event as the source relaxes back to quiescence, in order to quantitatively test the "twisted magnetosphere" model for magnetars, and establish the basic phenomenology of transient AXP events. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- New AXP ACIS-S NONE 20.0000 New AXP ACIS-S NONE 20.0000 New AXP ACIS-S NONE 20.0000 New AXP ACIS-S NONE 20.0000 01:00:43.10 -72:11:33.80 CXOU J0110043.1-7211 ACIS-S NONE 20.0000 01:00:43.10 -72:11:33.80 CXOU J0110043.1-7211 ACIS-S NONE 20.0000 01:00:43.10 -72:11:33.80 CXOU J0110043.1-7211 ACIS-S NONE 20.0000 01:00:43.10 -72:11:33.80 CXOU J0110043.1-7211 ACIS-S NONE 20.0000 01:46:22.30 +61:45:07.00 4U 0142+61 ACIS-S NONE 20.0000 01:46:22.30 +61:45:07.00 4U 0142+61 ACIS-S NONE 20.0000 01:46:22.30 +61:45:07.00 4U 0142+61 ACIS-S NONE 20.0000 01:46:22.30 +61:45:07.00 4U 0142+61 ACIS-S NONE 20.0000 10:50:07.10 -59:53:21.40 XTE J1810-197 ACIS-S NONE 20.0000 10:50:07.10 -59:53:21.40 XTE J1810-197 ACIS-S NONE 20.0000 10:50:07.10 -59:53:21.40 XTE J1810-197 ACIS-S NONE 20.0000 10:50:07.10 -59:53:21.40 XTE J1810-197 ACIS-S NONE 20.0000 10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 20.0000 10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 20.0000 10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 20.0000 10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 20.0000 17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 20.0000 17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 20.0000 17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 20.0000 17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 20.0000 18:41:19.20 -04:56:12.50 1E 1841-045 ACIS-S NONE 20.0000 18:41:19.20 -04:56:12.50 1E 1841-045 ACIS-S NONE 20.0000 18:41:19.20 -04:56:12.50 1E 1841-045 ACIS-S NONE 20.0000 18:41:19.20 -04:56:12.50 1E 1841-045 ACIS-S NONE 20.0000 18:44:53.00 -02:56:40.00 AX J1845-0258 ACIS-S NONE 20.0000 18:44:53.00 -02:56:40.00 AX J1845-0258 ACIS-S NONE 20.0000 18:44:53.00 -02:56:40.00 AX J1845-0258 ACIS-S NONE 20.0000 18:44:53.00 -02:56:40.00 AX J1845-0258 ACIS-S NONE 20.0000 23:01:07.90 +58:52:46.00 1E 2259+586 ACIS-S NONE 20.0000 23:01:07.90 +58:52:46.00 1E 2259+586 ACIS-S NONE 20.0000 23:01:07.90 +58:52:46.00 1E 2259+586 ACIS-S NONE 20.0000 23:01:07.90 +58:52:46.00 1E 2259+586 ACIS-S NONE 20.0000
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NORMAL GALAXIES: DIFFUSE EMISSION
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Proposal Number: 08610011
Proposal Title: Compact Galaxy Groups: Building Blocks of Galaxy Clusters and Massive Ellipticals PI: Gordon Garmire
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: The first galaxies and their environments differed substantially from those locally, with multiple interactions influencing their histories. Compared to all other nearby environments, present-day compact galaxy groups most closely reproduce conditions in the earlier universe (z~4) when galaxies assembled through hierarchical formation, and galaxy groups combined to form proto-clusters (in dense regions) or massive ellipticals (in the field). We propose senstitive Chandra observations of a nearby sample of compact groups. This study will enable penetrating investigations into the general X-ray properties of quiescent, active, and interacting galaxies locally. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:39:23.90 +00:52:41.00 HCG 7 ACIS-S NONE 39.0000 03:03:31.00 -15:38:41.00 HCG 22 ACIS-S NONE 32.0000 ==========================================================================================

Proposal Number: 08610215
Proposal Title: The Galactic Generation-X: The First Study of the X-ray Properties of Massive E+A Galaxies PI: Adrienne Juett
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: We propose Chandra observations of 11 E+A galaxies from SDSS to detect X-ray emission from intermediate-mass X-ray binaries (IMXBs) and hot gas. E+As contain a young stellar population, but with no O or B stars. IMXBs are NSs or BHs accreting from a 2-5 M_Sun donor. During their active phase, a super-Eddington mass-transfer rate is expected. We expect 10-1000 bright IMXBs/galaxy. We will measure the X-ray flux to detect the IMXB contribution, and constrain IMXB formation. Detection of hot gas will study the regeneration of X-ray halos in typical early-type galaxies. Post-merger remnants are deficient in gas compared to early-type galaxies. E+As are an intermediate stage between merger remnants and early-type galaxies. X-ray studies of E+As will measure the gas accumulation rate. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:03:32.80 +01:12:36.40 SDSSJ090332.77+01123 ACIS-S NONE 20.0000 22:55:06.80 +00:58:39.90 SDSSJ225506.79+00583 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08610240
Proposal Title: Reionizing the Universe: The Case of Haro 11 PI: John Grimes
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: An early generation of star forming galaxies is thought to have reionized the universe. However, we do not have a good understanding of how (or how much) ionizing radiation is able to escape from galaxies. Supernovae-driven galactic winds are believed to play a vital role by clearing paths through the gas surrounding a galaxy. This process can only be studied in detail in local galaxies. Haro 11 is the only known local galaxy with escaping ionizing radiation, and is one of the two closest examples of a class of UV-luminous galaxies whose overall properties strongly resemble high-z Lyman Break Galaxies. We propose to obtain Chandra observations of Haro 11 to map the hot gas in its wind, and thereby determine how the wind has facilitated the escape of ionizing radiation. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:36:52.50 -33:33:19.00 Haro 11 ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08610308
Proposal Title: Measuring the Dust-to-gas Ratio of High Redshift Galaxies PI: Xinyu Dai
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: We propose to observe the differential X-ray absorption in two gravitational lenses with significant optical extinctions. By combining the X-ray and optical differential absorption measurements, we will accurately measure the dust-to-gas ratio of the two cosmologically distant lens galaxies. Combining these new measurements with four earlier measurements, we will test whether the dust-to-gas ratio evolves with redshift as predicted by simulations of dust formation and evolution. Such information is to understanding galaxy and star formation and evolution in the presence of an absorbing ISM. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:13:01.10 +52:59:28.80 SBS0909+523 ACIS-S NONE 20.0000 09:51:22.60 +26:35:14.10 FBQ0951+2635 ACIS-S NONE 35.0000 ==========================================================================================

Proposal Number: 08610309
Proposal Title: X-ray thermal coronae of early-type galaxies in hot clusters PI: Ming Sun
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: Our cycle-7 archive project to study X-ray thermal coronae in nearby hot clusters has resulted in the discovery of more than 80 new coronae in 0.1 - 14 L* cluster galaxies. Relevant important physics, e.g., heat conduction, viscosity, SN heating and AGN feedback, can be constrained from the studies of these embedded mini-cooling cores. We propose follow-up on-axis observations of two luminous coronae (with the highest observed flux in our sample) and one faint corona to further understand: 1) The internal structure and energy balance of the embedded coronae (in unprecedented detail); 2) The X-ray faint coronae of massive galaxies; 3) Corona cooling and SMBH activity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:50:03.90 -41:22:57.00 NGC 4709 ACIS-S NONE 30.0000 16:15:03.80 -60:54:25.20 ESO 137-006 ACIS-S NONE 60.0000 16:17:19.90 +34:54:05.00 NGC 6107 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08610492
Proposal Title: Supernova feedback efficiency and the hot wind from NGC 3125 PI: David Strickland
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: We propose to observe the starbursting dwarf galaxy NGC 3125 as part of a larger multi-wavelength project aiming to determine the energy efficiency of supernova feedback as a function of star formation intensity (SFI) and host galaxy mass (M). NGC 3125 occupies a particularly important region of the SFI/M parameter space, having a similar mass but much higher SFI than the dwarf starbursts previously observed with Chandra. ACIS-S observations will determine the radiative energy losses, mass cooling rate, temperature, abundance ratios and extent of hot X-ray emitting plasma in what we expect to be a vigorous superwind. These observations will complement proposed Cycle 15 HST ACS+WFPC2 observations of warm ionized gas, yielding a complete view of feedback radiative energy losses. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 10:06:33.30 -29:56:07.00 NGC 3125 ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08610643
Proposal Title: Resolving the Problem of Stellar Orbital Anisotropy PI: Philip Humphrey
Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION
Abstract: Mass profiles of elliptical galaxies provide an insight into dark matter (DM) halo formation, while orbital structure is tied to evolutionary history. Unfortunately the mass-anisotropy degeneracy prevents either from being uniquely determined by stellar kinematics measurements alone. A recent controversy suggesting no DM in elliptical galaxies may be explained by this effect, illustrating the urgent need for better constraints. We propose a 75ks Chandra exposure of NGC4649 to break this degeneracy in a carefully-chosen galaxy. Combined with our deep optical spectra and PN and GC kinematics, this will provide definitive constraints on the mass and orbital anisotropy profiles. By combining all techniques for one galaxy, this will provide a textbook example of how to overcome the degeneracy. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:43:39.60 +11:33:09.40 NGC 4649 ACIS-S NONE 75.0000
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NORMAL GALAXIES: X-RAY POPULATIONS
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Proposal Number: 08620043
Proposal Title: Continued M31 Monitoring for Black Hole X-ray Nova PI: Stephen Murray
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: During A01-6 we found >12 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST followup have estimated orbital periods for 6 of these. Our AO7 program plans to double this number in order to yield a statistically meaningful orbital period distribution. We propose to continue this program, concentrating our scarce HST resources on a single transient which exceeds the NS Eddington limit. Only uninterrupted monitoring can yield the duty cycles and long-term lightcurves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated 574ks (ACIS+HRC) near the M31 bulge, and total Chandra exposure on M31 is now 814ks. By continuing our monitoring program through AO10 we will reach ~750ks on the bulge and >1Msec total Chandra M31 exposure. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08620054
Proposal Title: NGC4848: Telltale of the stripping in the coma cluster PI: Peter Predehl
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: We propose to resolve the diffuse emission of a spiral galaxy NGC4848, which is undergoing ram pressure stripping in the Coma cluster. Previous observations of the HI content agree well with the X-ray results on stripping, yet disagree on the details, such as gas distribution in the tail of NG4848, as well as the extent of the emmission within the galaxy. The spatial scale of the comparison requires spatial resolution superseding 10". These proposed observations should achieve it. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:58:05.50 +28:14:33.00 NGC4848 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08620086
Proposal Title: Searching for X-Ray Pulsars in M82 PI: Philip Kaaret
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: Starburst galaxies offer excellent sites to search for extremely young stellar objects. Here, we propose to use the high resolution and large collecting area of Chandra to search for pulsations from x-ray sources in M82. These observations should lead to unambiguous identification of very luminous accreting x-ray pulsars and may permit discovery of extremely young rotation-powered pulsars. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:55:52.20 +69:40:46.90 M82 HRC-S NONE 150.0000 ==========================================================================================

Proposal Number: 08620116
Proposal Title: A State Transition of the Ultraluminous X-Ray Source in M82 PI: Philip Kaaret
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: Ultraluminous X-ray sources (ULXs) are bright, non-nuclear X-ray sources in external galaxies. They have been interpreted as microquasars with jet beamed towards us (microblazars), mechanically beamed stellar-mass accreting black holes, and intermediate-mass black holes. We have an approved program to monitor the ULX in M82 with the Rossi X-Ray Timing Explorer. Here, we propose Chandra observations to be triggered after a state transition by the source to a high flux state. This will permit us to accurately measure the spectrum of the source in a high flux state. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:55:50.20 +69:40:47.00 M82 ULX ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08620494
Proposal Title: Continued M31 Monitoring for Black Hole X-ray Nova PI: MICHAEL GARCIA
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: During A01-6 we found >12 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST followup have estimated orbital periods for 6 of these. Our AO7 program plans to double this number in order to yield a statistically meaningful orbital period distribution. We propose to continue this program, concentrating our scarce HST resources on a single transient which exceeds the NS Eddington limit. Only uninterrupted monitoring can yield the duty cycles and long-term lightcurves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated ~500ks (ACIS+HRC) near the M31 bulge, and total Chandra exposure on M31 is now 814ks. By continuing our monitoring program through AO10 we will reach ~750ks on the bulge and >1Msec total Chandra M31 exposure. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 00:42:44.40 +41:16:08.30 M31 ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08620555
Proposal Title: NGC 4190-ULX1: The forgotten ULX PI: Timothy Roberts
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: Although it ranks amongst the nearest (at d ~ 3 Mpc) and brightest (fx ~ 2e-12 erg/cm^2/s) ULXs, NGC 4190-ULX1 has not yet been observed in the modern era of X-ray astronomy. We propose to remedy this omission with three new observations designed to probe its underlying nature. Firstly, we will obtain a high precision X-ray position of the ULX using HRC-I. This will be used to identify an unique counterpart in new HST/ACS imaging, plausibly the first step towards deriving a dynamical mass function for this source. Finally, we will use an ACIS-S observation to derive the first high quality X-ray diagnostics (spectrum, light curve) of this ULX, with the aim of providing an interim assessment of the nature of the compact object underlying its extreme X-ray emission. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:13:45.40 +36:37:55.00 NGC 4190-ULX1 HRC-I NONE 25.0000 ==========================================================================================

Proposal Number: 08620560
Proposal Title: Searching for Intermediate-Mass Black Holes in Nuclear Star Clusters PI: Joseph Shields
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: We propose ACIS observations of two late-type galaxies that have compact central star clusters with unusual nebular emission. Nuclear star clusters are of interest as the possible formation sites for intermediate-mass "seed" black holes that may be required for the production of supermassive black holes. The two targets show nuclear emission lines with wings extending to +/- 200 km/s, far greater than the stellar velocity dispersions of approximately 30 km/s for the associated star clusters. Chandra observations will allow us to identify or place limits on accretion sources in these objects that would signal the presence of a central black hole. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 06:01:08.00 -23:40:20.00 NGC 2139 ACIS-S NONE 39.0000 ==========================================================================================

Proposal Number: 08620639
Proposal Title: Deep Chandra and Hubble Observations of NGC 1023: Testing the Origin of Low-Mass X-ray Binaries in a Lenticular Galaxy PI: Gregory Sivakoff
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: Extragalactic low-mass X-ray binaries (LMXBs) can constrain galaxy histories, but we must first understand whether LMXBs present in the fields of galaxies were formed primordially in situ or dynamically in globular clusters (GCs). We propose 192 ks of ACIS-S observations + 8 orbits of HST-ACS on NGC1023, one of the nearest, massive lenticular galaxies. We will detect ~120 LMXBs and ~400 stellar clusters. Our comparison of the spatial distributions of field-LMXBs, GCs, and field stars in NGC1023 will constrain the origin of field LMXBs. Our observations will also perform the most complete census of diffuse star clusters (DSCs) to date. By probing the connection of DSCs to LMXBs, we will also test the dynamical formation model of LMXBs in stellar clusters. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 02:40:24.00 +39:03:47.70 NGC1023 ACIS-S NONE 32.0000 02:40:24.00 +39:03:47.70 NGC1023 ACIS-S NONE 160.0000 ==========================================================================================

Proposal Number: 08620970
Proposal Title: Galactic Bulge Latitude Survey-2 PI: Jonathan Grindlay
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: We propose to extend our Bulge Latitude Survey (BLS) at l ~0deg to b = 0.2-1.5deg to complement the b = -0.2-1.5deg BLS to be done in cycle 7. This will increase source statistics to measure radial gradients from SgrA* and allow searches for underlying differences (e.g. embedded clusters) already suspected at b >0. This full BLS will complement the Bulge Longitude surveys and the deeper pointed surveys to measure the source content and distribution in the inner Bulge. Infrared and optical imaging down to the confusion limit will enable a sensitive search for the counterparts despite varying extinction across the field and will extend the logN-logS analysis for the deeper Bulge Chandra fields. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:40:07.20 -28:12:01.90 GBW20 ACIS-I NONE 15.0000 17:40:35.60 -28:02:00.80 GBW19 ACIS-I NONE 15.0000 17:40:52.70 -28:18:17.90 GBW21 ACIS-I NONE 15.0000 17:41:22.50 -28:08:11.70 GBW22 ACIS-I NONE 15.0000 17:41:38.30 -28:24:32.90 GBW24 ACIS-I NONE 15.0000 17:42:06.60 -28:14:30.60 GBW23 ACIS-I NONE 15.0000 17:42:24.00 -28:30:47.00 GBW26 ACIS-I NONE 15.0000 17:42:52.30 -28:20:44.00 GBW25 ACIS-I NONE 15.0000 17:43:09.80 -28:37:00.10 GBW28 ACIS-I NONE 15.0000 17:43:38.00 -28:26:56.50 GBW27 ACIS-I NONE 15.0000 17:43:56.50 -28:43:19.60 GBW30 ACIS-I NONE 15.0000 17:44:23.80 -28:33:08.05 GBW29 ACIS-I NONE 15.0000 ==========================================================================================

Proposal Number: 08620985
Proposal Title: Massive Star Formation and Energy Feedback in the Starburst Region N11 PI: You-Hua Chu
Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS
Abstract: The starburst region N11 is the second largest star formation complex in the LMC. It contains four OB associations distributed in a central superbubble and dense HII regions along its periphery, indicating sequential star formation. Spitzer observations have revealed hundreds of massive protostars in N11. The relatively simple structure of N11 makes it an ideal starburst region for detailed study. We request a 300 ks ACIS-I observation of N11 to determine the X-ray properties of point sources and diffuse emission at arcsecond resolution. This deep observation will allow us to study (1) discrete X-ray source population and empirical L_x/L_bol, (2) X-ray emission from protostars, (3) bubbles/superbubbles and stellar energy feedback, and (4) physical structure of a starburst region. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 04:56:31.50 -66:27:47.00 LHA 120-N 11 ACIS-I NONE 140.0000 04:56:31.50 -66:27:47.00 LHA 120-N 11 ACIS-I NONE 160.0000
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ACTIVE GALAXIES AND QUASARS
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Proposal Number: 08700001
Proposal Title: NGC 3516: Disk Diagnostics from a Windy BLSy1 in a High-State PI: Tracey Turner
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Recent advances have shown X-ray flux to be simply correlated with reflection-signatures from the disk and with an associated wind in AGN. It appears two things are essential to observe the disk/wind: 1) catch the Seyfert in a high-state where disk/wind features show up strongly and 2) separate out reprocessing from distant gas to allow isolation of disk/wind features. NGC 3516 is currently in a very high state, which we predict will lead to observable features from the disk and its wind. UV data indicate NGC 3516 is very likely to have an observable disk wind due to a favorable orientation. We request 210 ks XMM exposure on NGC 3156 with supporting 200 ks Chandra time to test our prediction of flux-linked disk reflection and wind. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:06:47.60 +72:34:08.30 NGC 3516 ACIS-S HETG 40.0000 11:06:47.60 +72:34:08.30 NGC 3516 ACIS-S HETG 160.0000 ==========================================================================================

Proposal Number: 08700013
Proposal Title: VIEWS OF QUASAR OUTFLOWS THROUGH NATURAL LENSES PI: Gordon Garmire
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Recent Chandra and XMM-Newton observations of BALQSO APM08279+5255(z=3.91) have detected strong absorption lines in the Fe line region and imply the presence of a relativistic, energetic and highly ionized outflow. The proposed Chandra observations will allow us to (a) test the correctness of the present interpretations of the Fe line features, (b) monitor the time variability of the Fe absorption features, and (c) constrain the kinematic, ionization and absorbing properties of the quasar outflow. Evaluating the importance of quasar outflows to the enrichment of the interstellar and intergalactic medium even in one quasar will provide important constraints on understanding the connection between black hole and galaxy growth generally. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:31:41.60 +52:45:16.80 APM 08279+5255 ACIS-S NONE 45.0000 08:31:41.60 +52:45:16.80 APM 08279+5255 ACIS-S NONE 45.0000 ==========================================================================================

Proposal Number: 08700025
Proposal Title: Snapshot Survey for X-ray Outbursts in Rich Clusters of Galaxies PI: Gordon Garmire
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose a snapshot survey for X-ray outbursts in rich clusters of galaxies. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:14:13.00 -30:22:40.00 A2744 ACIS-I NONE 7.0000 00:26:36.20 +17:09:43.00 CL0024+17 ACIS-I NONE 7.0000 01:37:34.40 -12:59:26.00 Abell222 ACIS-I NONE 5.0000 02:39:53.10 -01:34:45.00 ABELL370 ACIS-I NONE 7.0000 03:29:41.60 -02:11:47.00 MACS0329.7-0212 ACIS-I NONE 7.0000 03:42:43.90 -53:38:27.60 A3158 ACIS-I NONE 5.0000 04:31:15.10 -61:27:04.00 ABELL3266 ACIS-I NONE 5.0000 04:54:09.80 +02:55:12.00 ABELL520 ACIS-I NONE 5.0000 07:47:31.10 -19:17:47.00 PKS0745-191 ACIS-I NONE 5.0000 08:30:53.30 +65:50:02.40 A665 ACIS-I NONE 5.0000 08:42:55.90 +29:27:27.00 MS0839.9+2938 ACIS-I NONE 5.0000 08:50:06.30 +36:04:20.00 ZWCL1953 ACIS-I NONE 7.0000 09:09:12.30 +10:58:30.60 MS0906.5+1110 ACIS-I NONE 5.0000 09:52:49.20 +51:53:06.00 ZWICKY2701 ACIS-I NONE 5.0000 10:10:32.30 -12:39:32.00 MS1008.1-1224 ACIS-I NONE 7.0000 10:17:03.40 +39:02:51.00 ABELL963 ACIS-I NONE 5.0000 11:12:54.40 +13:26:10.00 ABELL1201 ACIS-I NONE 5.0000 11:55:18.10 +23:24:17.00 A1413 ACIS-I NONE 5.0000 12:02:03.80 +58:02:09.40 A1446 ACIS-I NONE 5.0000 12:58:41.30 -01:45:41.00 Abell1650 ACIS-I NONE 5.0000 13:11:01.60 -03:10:38.00 MACS1311.0-0311 ACIS-I NONE 7.0000 13:11:34.20 -01:21:56.00 Abell1689 ACIS-I NONE 5.0000 13:32:43.20 +50:32:25.70 A1758 ACIS-I NONE 7.0000 13:59:50.60 +62:31:04.00 ZWCL1358+6245 ACIS-I NONE 7.0000 14:38:21.90 +03:40:13.00 ABELL1942ANDCLUMP ACIS-I NONE 5.0000 14:52:57.50 +58:02:55.20 ABELL1995 ACIS-I NONE 7.0000 14:57:15.00 +22:20:31.00 MS1455.0+2232 ACIS-I NONE 7.0000 15:10:11.70 +33:29:11.80 A2034 ACIS-I NONE 5.0000 15:22:29.00 +27:42:29.90 A2065 ACIS-I NONE 5.0000 15:40:58.30 +66:18:28.00 A2125 ACIS-I NONE 5.0000 15:58:15.10 +27:14:43.00 A2142 ACIS-I NONE 5.0000 16:21:24.80 +38:10:08.00 MACS1621.6+3810 ACIS-I NONE 7.0000 16:35:52.80 +66:12:50.40 A2218 ACIS-I NONE 5.0000 16:40:24.00 +46:42:36.00 ABELL2219 ACIS-I NONE 5.0000 17:02:42.60 +34:03:37.40 ABELL2244 ACIS-I NONE 5.0000 17:12:41.50 +64:04:08.00 ABELL2255 ACIS-I NONE 5.0000 17:20:16.70 +35:36:26.00 MACS1720.3+3536 ACIS-I NONE 7.0000 20:12:50.30 -56:50:57.00 ABELL3667 ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08700026
Proposal Title: Monitoring the changing wind of a Seyfert galaxy PI: Mariano Mendez
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The bright Seyfert galaxy NGC 5548 has been observed with Chandra and XMM-Newton during the period 1999-2002. A recent observation in 2005 caught the source during a long period of low flux. The spectrum shows for the first time a significant drop of the narrow forbidden O VII emission line, as well as new lowly ionized components in the warm absorber. We propose to re-observe NGC 5548 with the LETGS for 140 ks. If the source remains in a low state, limits on any further decrease in ionization will be derived, and the spectrum combined with the 2005 spectrum allows for a more accurate study of the low state absorber. If NGC 5548 is in a normal state again, we will see wheter the forbidden O VII emission line has increased again or not, and whether the lowly ionized components disappeared. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:17:59.60 +25:08:13.40 NGC 5548 HRC-S LETG 141.0000 ==========================================================================================

Proposal Number: 08700034
Proposal Title: Search for strongly obscured AGN: support for INTEGRAL all-sky hard X-ray survey PI: Stephen Murray
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We are close to a completion of an all-sky hard X-ray survey with INTEGRAL that will provide unbiased statistics of nearby AGN, including strongly obscured ones. More than 70 INTEGRAL sources have already been identified with AGN; 6 of these, all strongly absorbed, were localized and identified with Chandra. We now propose to observe with Chandra the error boxes of another 13 INTEGRAL sources, candidate obscured AGN. This will help identify the sources, measure their absorption columns, and complete the INTEGRAL survey. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:38:54.70 -48:33:21.60 IGR J08390-4833 ACIS-S NONE 3.5000 09:52:12.20 -62:31:08.40 IGR J09522-6231 ACIS-S NONE 3.5000 14:49:26.90 -55:34:48.00 IGR J14493-5534 ACIS-S NONE 3.5000 14:56:08.90 -37:38:42.00 IGR J14561-3738 ACIS-S NONE 3.5000 21:34:29.30 +47:37:01.20 IGR J21343+4738 ACIS-S NONE 3.5000 23:52:21.10 +58:44:06.00 IGR J23523+5844 ACIS-S NONE 3.5000 ==========================================================================================

Proposal Number: 08700049
Proposal Title: NGC 5905: the late phase of the tidal disruption of a star by a SMBH PI: Peter Predehl
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose a 75ks Chandra ACIS-S observation of NGC 5905 in order to follow the long term tidal disruption decline law, and test for the presence of a faint permanent AGN. The high spatial resolotion of Chandra is essential to reach the goals of this proposal. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 15:15:23.30 +55:31:01.80 NGC5905 ACIS-S NONE 75.0000 ==========================================================================================

Proposal Number: 08700077
Proposal Title: AN X-RAY MICROLENSING TEST OF THE AU-SCALE CENTRAL STRUCTURE OF THE QUADRUPLE QUASAR 2237+0305 PI: Shin Mineshige
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose Chandra observations of the gravitationally lensed quasar Q2237+0305 during a microlensing event to reveal its AU scale central structure. The quasar is being monitored from the ground regularly to ascertain the onset of the event. As it occurs, we will measure X-ray spectral variations with Chandra and compare with those taken before and after the event. Since a small region of the quasar accretion disk is strongly magnified during the event, we will be able to limit the mass contained on scales of several AUs and to probe the physical properties of X-ray emitting gas in the vicinity of the black hole. Together with ground-based telescopes, we can resolve the quasar emission regions at multiple wavelengths. This provide a critically test of quasar accretion disk theories. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:40:30.30 +03:21:31.00 Q2237+0305 (Einstein ACIS-S NONE 20.0000 22:40:30.30 +03:21:31.00 Q2237+0305 (Einstein ACIS-S NONE 20.0000 22:40:30.30 +03:21:31.00 Q2237+0305 (Einstein ACIS-S NONE 20.0000 22:40:30.30 +03:21:31.00 Q2237+0305 (Einstein ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08700135
Proposal Title: X-ray Properties of AGNs with Intermediate-mass Black Holes: Part II PI: Luis Ho
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Supermassive (10^6-10^9 solar mass) black holes (BHs) are thought to be closely linked with the formation and evolution of large galaxies, especially their bulge component. Can BHs holes form in the absence of a bulge? Does the mass function of BHs extend below 10^6 solar masses? Intermediate-mass BHs (10^4-10^6 solar masses) may offer important clues to the nature of the seeds of supermassive BHs, but while they have been found in a couple of nearby AGNs, their frequency is unknown. We have used the SDSS to identify a sample of 19 AGNs powered by intermediate-mass BHs. This is the first and only sample of its kind, which can be used to explore accretion physics in a new mass regime; we propose to complete our census of the sample's basic X-ray properties. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 03:25:15.60 +00:34:08.40 SDSS J032515.59+0034 ACIS-S NONE 5.0000 10:11:08.40 +00:29:08.70 SDSS J101108.40 +002 ACIS-S NONE 5.0000 11:51:38.20 +00:49:46.40 SDSS J115138.24+0049 ACIS-S NONE 5.0000 13:57:24.50 +65:25:05.80 SDSS J135724.52+6525 ACIS-S NONE 5.0000 14:12:34.70 +00:34:60.00 SDSS J141234.67-0035 ACIS-S NONE 5.0000 14:45:07.30 +59:36:49.90 SDSS J144507.30+5936 ACIS-S NONE 5.0000 17:02:46.10 +60:28:18.90 SDSS J170246.09+6028 ACIS-S NONE 5.0000 17:27:59.10 +54:21:47.00 SDSS J172759.15+5421 ACIS-S NONE 5.0000 23:21:59.10 +00:07:38.80 SDSS J232159.06+0007 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08700136
Proposal Title: The origin of the iron line complex in the reflection-less Seyfert 1 galaxy NGC7213 PI: Giorgio Matt
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe with Chandra ACIS-S HETG the Seyfert 1 Galaxy NGC 7213 for 150 ks. The source is without a detectable Compton reflection component, but has a neutral iron line with EW~80 eV, suggesting an origin in Compton-thin matter like the BLR. Ionizer iron emission features have also been revealed. The aim of the proposed observation is twofold: a) to measure in detail the neutral iron line width and check whether it is consistent with that of the optical broad lines. b) to confirm the presence of the two ionized lines. To better compare X-ray and BLR line widths, we propose a coordinated optical spectroscopic observation of NGC 7213 with the CTIO 4-m. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:09:16.20 -47:10:00.00 NGC 7213 ACIS-S HETG 150.0000 ==========================================================================================

Proposal Number: 08700160
Proposal Title: Are AGN Quenching the Star Formation in Post-Starburst Galaxies? PI: Ann Zabludoff
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The bulge-BH mass relation in galaxies is poorly understood. Our discovery of low-luminosity AGN in post-starburst, post-merger galaxies suggests that any rapid growth phase of the AGN has ended roughly with the star formation. Is this connection between BH and bulge evolution causal, as proposed by a new crop of merger-induced, AGN-feedback models? Testing these models requires 1) dating, within the first few 100 Myr, the starburst's age, 2) searching for the declining AGN in X-rays to limit obscuration, and 3) using high-resolution X-ray imaging to exclude the starburst's hot gas as the X-ray source. We propose to look for AGN in four post-merger, post-starburst galaxies whose young stellar clusters place a tight upper-limit on the time elapsed since the starburst. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:01:19.00 -12:10:18.00 EA01 ACIS-I NONE 30.0000 12:09:05.50 -12:22:36.00 EA03 ACIS-I NONE 30.0000 ==========================================================================================

Proposal Number: 08700193
Proposal Title: Ionization map of the Seyfert 2 galaxy Mrk 573 PI: Stefano Bianchi
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe the bright Seyfert 2 galaxy Mrk573 with Chandra ACIS-S for 40 ks, in order to perform X-ray spatially-resolved spectroscopy on the material responsible for the soft X-ray emission. A detailed ionization map of the soft X-ray emission of Mrk573 can be obtained with the proposed observation of 40 ks and can be compared with the ionization map of the NLR. Mrk573 represents the ideal object for such a kind of analysis, having the largest NLR among the Seyfert galaxies studied by HST and being a rather bright obscured AGN in the soft X-rays. Moreover, the detailed analysis of the NLR available in literature and its correlation with the radio ejecta contribute to make this object the best choice to investigate the origin of the soft X-ray emission in obscured AGN. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:43:57.80 +02:21:00.00 Mrk573 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08700203
Proposal Title: Probing heavy obscuration in optically selected Type 2 quasar candidates PI: Cristian Vignali
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to double the number of SDSS Type 2 quasar candidates with sensitive X-ray coverage by observing 12 luminous narrow-line AGN at z=0.40-0.73 with Chandra. These observations will confirm whether these sources are genuine obscured quasars (NH>10^22 cm^-2; L(2-10 keV)>10^44 erg/s) through basic X-ray spectral fitting and stacking analyses. Although past investigations have shown that >50% of the SDSS Type 2 quasars have NH>10^22-10^23 cm^-2, with the remaining sources being possibly more obscured, statistical analyses have been challenged by the small number of sources available. With the proposed observations, we will observe all of the SDSS Type 2 quasar candidates with L(2-10 keV)>4x10^44 erg/s. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:56:21.70 +00:32:35.80 SDSS J005621.72+0032 ACIS-S NONE 10.0000 01:20:32.20 -00:55:02.00 SDSS J012032.21-0055 ACIS-S NONE 10.0000 01:34:16.30 +00:14:13.60 SDSS J013416.34+0014 ACIS-S NONE 10.0000 01:49:32.50 -00:48:03.70 SDSS J014932.53-0048 ACIS-S NONE 10.0000 01:57:16.90 -00:53:04.80 SDSS J015716.92-0053 ACIS-S NONE 10.0000 07:37:45.90 +40:21:46.50 SDSS J073745.88+4021 ACIS-S NONE 10.0000 09:21:52.40 +51:53:48.10 SDSS J092152.45+5153 ACIS-S NONE 10.0000 10:27:46.00 +00:32:05.00 SDSS J102746.03+0032 ACIS-S NONE 10.0000 10:39:51.50 +64:30:04.20 SDSS J103951.49+6430 ACIS-S NONE 10.0000 12:28:45.70 +00:50:18.70 SDSS J122845.74+0050 ACIS-S NONE 10.0000 14:46:42.30 +01:13:03.00 SDSS J144642.29+0113 ACIS-S NONE 10.0000 15:17:11.50 +03:31:00.20 SDSS J151711.47+0331 ACIS-S NONE 10.0000 ==========================================================================================

Proposal Number: 08700229
Proposal Title: Microlensing of the Quadruply Lensed Quasar PG 1115+080 PI: David Pooley
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The quaduply lensed quasar PG 1115+080 shows strong evidence from Chandra observations carried out in 2000 of being microlensed by one or more stellar mass objects in the lensing galaxy. If true, the X-ray and optical flux ratios among the four images place severe constraints on the sizes of the emitting regions. Under the microlensing hypothesis, the strongly demagnified A2 image should become less demagnified on a time scale of ~10 years. Recent XMM observations suggest this could be taking place. A 30 ks Chandra observation will provide a crucial test of the microlensing hypothesis. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:18:17.00 +07:45:59.40 PG1115+080 ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08700238
Proposal Title: Flux ratio anomalies in gravitationally lensed quasars with four images: Chandra observations of 4 new systems. PI: Paul Schechter
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe four quasars lensed by intervening galaxies for a total of 55 ksec. Each quasar has four images. Comparison of the X-ray flux ratios with the corresponding optical ratios constrains the relative sizes of the two emitting regions. Comparison with predictions from smooth lens models constrains the lenses' dark matter content. There is growing evidence that the flux ratio ``anomalies'' -- the differences between the observed fluxes and those predicted by smooth models -- are yet larger in X-rays than in the optical. The implications are first, that the optical comes from a substantially larger region than predicted by Shakura-Sunyaev disks models, and second, that X-ray observations give a better handle on the dark matter content than optical observations. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 04:38:14.80 -12:17:15.00 HE0435-1223 ACIS-S NONE 10.0000 11:16:23.50 -06:57:39.00 HE1113-0641 ACIS-S NONE 15.0000 11:38:03.70 +03:14:58.10 SDSS1138+0314 ACIS-S NONE 20.0000 20:26:10.40 -45:36:27.10 WFI2026-4536 ACIS-S NONE 10.0000 ==========================================================================================

Proposal Number: 08700341
Proposal Title: Exploring the X-ray--TeV connection in BLLacs at short timescales PI: Luigi Costamante
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to perform 1 ToO for a full night (~30 ks) simultaneous observation with Chandra and H.E.S.S., on a TeV flaring blazar with flux high enough to constrain both spectra on hour timescales or less. Our goal is to investigate with unprecedented detail the intra-night and sub-hour variability in TeV blazars, and to shed light onto the relation between X-ray and TeV emissions, whose usual correlation has been questioned by recent results (e.g. 1ES 1959+650). Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- TeV flaring BLLac ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08700344
Proposal Title: Investigating AGN Activity in Low Surface Brightness Galaxies PI: Mousumi Das
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Low surface brightness (LSB) galaxies represent an extreme population in terms of galaxy evolution. They have diffuse stellar disks but massive HI gas masses; a large fraction also have large bulges. AGN activity has been detected in LSB galaxies and in at least one case radio jets/lobes have been detected as well. Very little is known about the AGN activity and X-ray emission from LSB galaxies. We request Chandra time to measure the X-ray emission from the AGN in a sample of 15 giant LSB galaxies. We will also catalogue the non-nuclear X-ray sources. Given the current progress in relating AGN activity directly to galactic evolution, it is particularly important to study AGN activity in this unusual class of galaxies. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:56:19.20 +73:16:58.00 UGC 1378 ACIS-S NONE 3.5000 01:58:48.00 +24:53:33.00 UGC 1455 ACIS-S NONE 3.6000 02:27:45.80 +28:12:33.00 UGC 1922 ACIS-S NONE 6.0000 04:02:48.20 +01:57:57.00 UGC 02936 ACIS-S NONE 3.0000 04:29:42.40 +03:40:55.00 UGC 3059 ACIS-S NONE 3.2000 08:27:42.00 +21:28:44.00 UGC 4422 ACIS-S NONE 3.0000 21:29:31.50 +27:19:17.00 UGC 11754 ACIS-S NONE 4.4000 23:55:41.90 +31:53:59.00 UGC 12845 ACIS-S NONE 3.3000 ==========================================================================================

Proposal Number: 08700396
Proposal Title: Are Compton-thick quasars hidden among the population of heavily obscured Spitzer-selected AGN? PI: Cristian Vignali
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: A fraction as high as 50-70% of the Seyfert 2 galaxies in the local Universe are obscured by cold gas, with column densities larger than Nh=10^24 cm^-2 (i.e., in the Compton-thick regime). Heavy obscuration has to be common also at larger distances in order to explain the XRB spectral shape around 30 keV. Despite intensive searches, mostly performed in the X-ray band, only a few candidates beyond the nearby Universe have been uncovered thus far. We propose pilot Chandra observations of a well defined sample of seven high-redshift (z=1.8-2.7) sources suspected to host a Compton-thick AGN selected from moderate-depth mid-infrared (Spitzer) observations in the Bootes Field. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:25:38.20 +35:18:55.20 SST24 J142538.22+351 ACIS-S NONE 15.0000 14:26:45.70 +35:19:01.40 SST24 J142645.71+351 ACIS-S NONE 15.0000 14:29:24.80 +35:33:20.30 SST24 J142924.83+353 ACIS-S NONE 15.0000 14:34:47.70 +33:02:30.60 SST24 J143447.70+330 ACIS-S NONE 15.0000 14:35:20.70 +34:04:18.20 SST24 J143520.75+340 ACIS-S NONE 15.0000 14:35:39.30 +33:41:59.10 SST24 J143539.34+334 ACIS-S NONE 15.0000 14:36:44.20 +35:06:27.40 SST24 J143644.22+350 ACIS-S NONE 60.0000 ==========================================================================================

Proposal Number: 08700408
Proposal Title: An Exploratory Chandra Survey of Weak-Line Quasars from the Sloan Digital Sky Survey PI: William Brandt
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The SDSS has discovered a mysterious class of radio-quiet and radio-moderate quasars at high redshift with no or extremely weak high-ionization emission lines. These weak-line quasars (WLQs) may have "anemic" high-ionization Broad Line Regions, or they may have relativistically boosted optical/UV continua (as for BL Lacs). We propose exploratory Chandra observations of 9 WLQs that will nearly triple the sample with sensitive X-ray coverage, allowing the first reliable characterization of their basic X-ray properties. By probing their inner accretion regions, we aim to assess the current explanations for WLQs and their implications for, e.g., emission-line formation, high-velocity outflows, and relativistic jets. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 03:17:12.20 -07:58:50.30 SDSS J0317-0758 ACIS-S NONE 4.3000 09:28:32.90 +18:48:24.40 SDSS J0928+1848 ACIS-S NONE 4.0000 11:41:53.30 +02:19:24.30 SDSS J1141+0219 ACIS-S NONE 4.0000 12:12:21.60 +53:41:27.90 SDSS J1212+5341 ACIS-S NONE 4.0000 12:31:32.40 +01:38:14.00 SDSS J1231+0138 ACIS-S NONE 4.0000 13:02:16.10 +00:30:32.10 SDSS J1302+0030 ACIS-S NONE 9.5000 13:34:22.60 +47:50:33.50 SDSS J1334+4750 ACIS-S NONE 11.6000 13:35:50.80 +35:33:15.80 SDSS J1335+3533 ACIS-S NONE 23.6000 14:21:03.80 +34:33:32.00 SDSS J1421+3433 ACIS-S NONE 12.8000 ==========================================================================================

Proposal Number: 08700463
Proposal Title: A snapshot X-ray/radio survey of AGNs selected from the long menu of SDSS galaxies PI: Sebastian Heinz
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to carry out a 200 ksec {\em Chandra} and 10 hr VLA X-ray/radio snapshot survey of a sample of 17 AGN selected from the Sloan Digital Sky Survey. The sample is chosen to span a wide range in both emission line and radio luminosity. The goal of the investigation is to compare and calibrate [OIII], X-ray, and radio luminosities as accretion rate indicators for both low-luminosity and high-luminosity AGN, to investigate the nature and origin of radio-loudness, and to test the ``fundamental plane of black hole activity'' using a sample of black holes of fixed mass that cover a wide range in accretion rate. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:01:01.10 -00:24:44.28 2MASX J010103-013440 ACIS-S NONE 17.0000 01:41:16.34 -08:35:39.12 SDSS J014116-092420 ACIS-S NONE 5.0000 08:10:40.27 +48:12:33.13 2MASX J081040+481233 ACIS-S NONE 11.0000 08:36:42.82 +53:34:32.52 2MASX J083642+533431 ACIS-S NONE 16.0000 08:37:18.00 +53:15:16.92 2MASX J083717+531517 ACIS-S NONE 7.0000 09:12:01.68 +53:20:36.59 2MASX J091201+532036 ACIS-S NONE 19.0000 10:12:39.87 -01:06:22.68 LCRS B101008-023710 ACIS-S NONE 17.0000 11:09:57.14 +02:01:38.64 2MASX J110957+020138 ACIS-S NONE 7.0000 12:53:47.02 +03:26:30.48 CGCG 043-056 ACIS-S NONE 8.0000 13:49:07.23 +05:04:12.00 2MASX J134907+050413 ACIS-S NONE 11.0000 13:49:09.62 +04:04:48.36 2MASX J134909+040448 ACIS-S NONE 11.0000 15:42:28.34 +52:59:51.00 2MASX J154228+525950 ACIS-S NONE 9.0000 16:01:09.07 +46:23:17.89 2MASX J160109+462318 ACIS-S NONE 11.0000 16:02:46.39 +52:43:58.44 4C52.37 ACIS-S NONE 20.0000 16:12:09.29 +00:03:33.12 2MASX J161209+000333 ACIS-S NONE 6.0000 21:25:12.48 -07:13:30.00 APMUKS 212229-085908 ACIS-S NONE 7.0000 23:08:17.31 -09:46:22.44 APMUKS 230535-102920 ACIS-S NONE 18.0000 ==========================================================================================

Proposal Number: 08700478
Proposal Title: X-ray Jets and Lobe-Cluster Interaction in 3C353 PI: Jun Kataoka
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Structure of jets and their basic properties are still unknown. That is especially true for the most powerful jets hosted by quasars and FRII radio galaxies, because they are too distant to study their structure with high spatial resolution. Radio galaxy 3C353 is a truly unique source, because its two jets - of the FRII type - are 4''-wide, and therefore can be well resolved by Chandra. Moreover, it is situated at the edge of the merging cluster Zw1718.1-0108, and is characterized by an unusual (asymmetric) lobe morphology. The proposed 90 ks Chandra observation of this objects will allow us to investigate [1] the transverse structure of an X-ray jet of the FR II type with unparalleled spatial resolution, and [2] the interaction between the lobes of this radio galaxy and a merging cluster. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:20:28.10 -00:58:46.80 3C353 ACIS-S NONE 90.0000 ==========================================================================================

Proposal Number: 08700502
Proposal Title: Dissecting an Accretion Disk PI: Chistopher Kochanek
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We will use 5 epochs of CXO and HST imaging to determine the X-ray and UV size of the accretion disk of the lensed quasar RXJ1131--1231 using microlensing. Based on preliminary data, we find that the X-ray source is roughly 1/10 the size of the accretion disk in the rest-frame B-band. The new observations will significantly reduce the uncertainties in this estimate, provide a comparison between the size of the X-ray source and the size of the accretion disk in the rest frame ultraviolet, and have the signal-to-noise ratio necessary to begin examining the size of the hard and soft-band X-ray emission regions separately. The results will quantitatively test accretion disk theory and X-ray emission mechanisms. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08700512
Proposal Title: Jets, Bubbles, Binaries, and Hot Gas: A Deep Observation of Centaurus A PI: Ralph Kraft
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe Centaurus A, the nearest radio galaxy and the nearest massive early-type galaxy, for 1.2 Ms. We will probe the particle acceleration processes of the jet to an unprecedented sensitivity, by measuring its spectrum and morphology on the scale of radiative energy losses. We also will measure the proper motions and velocity shear of X-ray knots. We will measure the temperature and density structure of the shock around the SW radio lobe to study the hydrodynamics of the lobe/ISM interaction to a level previously seen only in Galactic SNRs. We will detect hundreds of X-ray binaries, probe the GC/LMXB link, and investigate their temporal properties. Finally, we will measure the thermodynamic paramters of the gas and the elemental abundance throughout the ISM. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 13:25:33.00 -43:00:11.00 Centaurus A Jet ACIS-I NONE 120.0000 13:25:33.00 -43:00:11.00 Centaurus A Jet ACIS-I NONE 160.0000 13:25:33.00 -43:00:11.00 Centaurus A Jet ACIS-I NONE 160.0000 13:25:33.00 -43:00:11.00 Centaurus A Jet ACIS-I NONE 160.0000 ==========================================================================================

Proposal Number: 08700521
Proposal Title: What Powers the z~2 Spitzer ULIRGs in the First Look Survey PI: Lin Yan
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose an exploratory program of 5x30ksec to target ~16 z~2 ULIRGs, recently discovered with Spitzer mid-IR spectroscopy. Their mid-IR spectra and redshifts indicate these are heavily obscured systems; are (1-2) dex brighter than local ULIRGs; and are likely to contain a significant AGN component. Combined with our Spitzer data, the proposed X-ray observations will constrain the AGN contribution to the bolometric luminosity, and the true SFR density at z~2. More importantly, it will test the possible connection between ULIRGs and QSOs at z~2, and whether our ULIRGs are a distinct population missed in sub-mm surveys; both results have significant cosmological implications. Finally, our results will set tighter constraints on the volume density of type II QSOs Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:11:58.30 +58:45:29.90 FLS4 ACIS-I NONE 30.0000 17:14:46.30 +60:10:05.50 FLS1 ACIS-I NONE 30.0000 17:15:27.10 +59:38:42.00 FLS3 ACIS-I NONE 30.0000 17:18:40.10 +60:02:07.80 FLS2 ACIS-I NONE 30.0000 17:23:44.20 +59:23:35.90 FLS6 ACIS-I NONE 30.0000 ==========================================================================================

Proposal Number: 08700540
Proposal Title: What is Energizing the extended X-ray emission surrounding the jet in PKS 1055+201? PI: Daniel Schwartz
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose a 220 ks observation of PKS 1055+201 to probe the spectral and spatial structure of extended X-ray emission surrounding the narrow X-ray and radio jet. The system is unusual by showing only very weak radio emission from this extended ``tube.'' Our measurements will relate these structures to the magnetic fields, Doppler factors, and kinetic energy fluxes along the jet, giving a prime opportunity to constrain the system energetics. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 10:58:17.90 +19:51:50.90 PKS 1055+201 ACIS-S NONE 60.0000 10:58:17.90 +19:51:50.90 PKS 1055+201 ACIS-S NONE 160.0000 ==========================================================================================

Proposal Number: 08700551
Proposal Title: The Chandra-RBGS Survey of a Complete Sample of Luminous Infrared Galaxies PI: David Sanders
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose a Chandra-ACIS survey of a complete sample of Luminous Infrared Galaxies (LIRGs) with Lir >10^11.5, from the IRAS Revised Bright Galaxy Sample (RBGS). All of these objects are interacting/merging gas-rich spirals. Our new observations will provide a uniform and complete census of AGN and X-ray luminous starbursts in the nearest and brightest LIRGs, and will complement approved Spitzer-IRAC+MIPS, and HST-ACS imaging of the same sample. The results will be used to address the following key questions: are binary AGN a common feature of these LIRGs, and if so, when and at what level is the AGN activity triggered in each nucleus ? and can the fueling and growth of massive black holes be correlated in time with the merger phase ? Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:38:52.90 -10:27:11.40 IRAS F01364-1042 ACIS-S NONE 15.0000 04:46:49.50 -48:33:32.90 ESO 203-IG001 ACIS-S NONE 15.0000 05:16:46.40 +79:40:12.60 VII Zw 031 ACIS-S NONE 15.0000 06:27:23.10 -47:10:47.00 ESO 255-IG007 ACIS-S NONE 15.0000 07:27:37.60 -02:54:54.10 IRAS 07251-0248 ACIS-S NONE 15.0000 08:52:29.90 -69:01:58.00 ESO 60-IG016 ACIS-S NONE 15.0000 09:04:12.70 -36:27:01.10 IRAS 09022-3615 ACIS-S NONE 15.0000 09:13:38.80 -10:19:20.30 IRAS F09111-1007 ACIS-S NONE 15.0000 10:06:04.80 -33:53:15.00 IC 2545 ACIS-S NONE 15.0000 10:20:00.20 +08:13:34.00 IRAS F10173+0828 ACIS-S NONE 15.0000 13:15:06.40 -55:09:22.70 IRAS 13120-5453 ACIS-S NONE 15.0000 13:15:35.00 +62:07:28.80 VV 250a ACIS-S NONE 15.0000 13:20:35.30 +34:08:22.20 UGC 08387 ACIS-S NONE 15.0000 14:40:59.00 -37:04:32.00 IRAS F14378-3651 ACIS-S NONE 15.0000 14:57:00.70 +24:37:02.70 VV 340a ACIS-S NONE 15.0000 16:38:13.20 -68:26:42.80 ESO 069-IG006 ACIS-S NONE 15.0000 17:14:20.00 +53:10:30.00 IRAS F17132+5313 ACIS-S NONE 15.0000 18:32:41.10 -34:11:27.50 IRAS F18293-3413 ACIS-S NONE 15.0000 19:14:30.90 -21:19:07.00 ESO 593-IG008 ACIS-S NONE 15.0000 19:32:21.20 -03:59:56.30 IRAS F19297-0406 ACIS-S NONE 15.0000 19:56:35.40 +11:19:02.60 IRAS 19542+1110 ACIS-S NONE 15.0000 20:57:23.30 +17:07:34.30 CGCG 448-020 ACIS-S NONE 15.0000 21:11:30.40 +58:23:03.20 IRAS 21101+5810 ACIS-S NONE 15.0000 22:49:39.90 -48:50:58.10 ESO 239-IG002 ACIS-S NONE 15.0000 22:51:49.30 -17:52:23.50 IRAS F22491-1808 ACIS-S NONE 15.0000 23:21:04.30 -69:12:54.00 ESO 077-IG014 ACIS-S NONE 15.0000 ==========================================================================================

Proposal Number: 08700576
Proposal Title: Interaction of AGN Outbursts with their Environments PI: William Forman
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to study the interactions of AGN outbursts with their environments through an observation of two radio sources, PKS0123-016A and 3C40, associated with NGC541 and NGC547. Both galaxies lie in the cluster A194 and are surrounded by small X-ray coronae. Using a VLA observation, we will compare the coronal gas parameters (density, temperature, pressure) with the radio structure to understand how powerful AGN channel energy through tenuous coronae. We will measure the source spectrum, detect individual luminous X-ray sources, and compare the radio and X-ray structure of Minkowski's object, a local example of jet-induced star formation that lies along the jet emanating from NGC541. We will search for jet emission from both 3C40 and PKS0123-016A and study the hotspot in PKS0123-016A. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:25:53.50 -01:21:54.00 3C40 and PKS0123-016 ACIS-S NONE 75.0000 ==========================================================================================

Proposal Number: 08700618
Proposal Title: Probing the Disk-Wind Connection in the Seyfert Galaxy NGC 4151 PI: STEVEN KRAEMER
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Recent X-ray observations of NGC 4151 have revealed dramatic changes in the X-ray absorption due to bulk motion of the gas across our line-of-sight. We determined that a component of this gas has a transverse velocity > 1250 km/sec and, based on photo-ionization models, must lie ~ 0.1 pc from the central. This suggests that the absorber arises in a disk-driven wind, making NGC 4151 the only Seyfert 1 to have shown direct evidence of this phenomenon. However, the connection between this component and the high column density gas responsible for most of the X-ray absorption is unknown. We request 2 Chandra/HETG observations, of 50 ksec each, to follow our two cycle 5 XMM observations, to monitor changes in the absorbers, constrain their physical conditions, and probe the disk-wind connection. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:10:32.60 +39:24:20.60 NGC 4151 ACIS-S HETG 50.0000 12:10:32.60 +39:24:20.60 NGC 4151 ACIS-S HETG 50.0000 ==========================================================================================

Proposal Number: 08700652
Proposal Title: Demographics of black holes in the local Universe. PI: Smita Mathur
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Recent observations imply that at redshift zero, most of the nuclear activity must reside in low mass galaxies, preferentially late-type spirals and dwarf ellipticals. We propose to search for low-level nuclear activity in a representative sample of low-mass galaxies within 20Mpc. This study will allow us to set lower limits to the number of galaxies which host low-mass supermassive black holes (SBH) (<10^7 M_sun, pushing the limit of known SBHs down to 10^4 M_sun), and explore the correlation between low level X-ray activity and galaxy morphology. In particular, we will be able to determine to what extent the presence/morphology of a bulge component influences SBH formation. These issues have important consequences toward understanding the formation and co-evolution of SBHs and galaxies. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:47:47.30 -11:28:07.30 NGC 255 ACIS-S NONE 5.0000 01:47:42.80 -52:45:42.50 NGC 685 ACIS-S NONE 5.0000 02:35:32.70 -07:09:15.90 NGC 991 ACIS-S NONE 5.0000 03:19:51.20 -26:03:38.10 NGC 1302 ACIS-S NONE 5.0000 03:23:06.60 -21:22:30.60 NGC 1315 ACIS-S NONE 5.0000 03:24:48.50 -21:20:10.00 NGC 1325A ACIS-S NONE 5.0000 03:27:58.40 -37:08:60.00 NGC 1341 ACIS-S NONE 5.0000 03:39:30.80 -18:41:17.40 NGC 1400 ACIS-S NONE 5.0000 04:10:59.90 -56:28:49.60 NGC 1536 ACIS-S NONE 5.0000 04:42:14.50 -20:26:05.20 NGC 1640 ACIS-S NONE 5.0000 04:52:52.10 -59:44:32.10 NGC 1703 ACIS-S NONE 5.0000 05:41:51.10 -64:18:04.10 NGC 2082 ACIS-S NONE 5.0000 10:00:52.10 +55:37:07.80 NGC 3073 ACIS-S NONE 5.0000 10:08:09.30 +51:50:38.00 UGC 5460 ACIS-S NONE 5.0000 10:36:23.80 +12:42:26.60 NGC 3299 ACIS-S NONE 5.0000 11:47:04.60 -16:51:16.60 NGC 3887 ACIS-S NONE 5.0000 11:50:38.90 +55:21:13.90 NGC 3913 ACIS-S NONE 5.0000 11:52:49.50 +44:07:14.60 NGC 3938 ACIS-S NONE 5.0000 11:57:17.30 +49:16:59.10 UGC 6930 ACIS-S NONE 5.0000 12:01:23.70 +13:24:03.70 NGC 4037 ACIS-S NONE 5.0000 12:18:49.60 +14:24:59.40 NGC 4254 ACIS-S NONE 5.0000 12:21:40.90 +11:30:12.20 NGC 4299 ACIS-S NONE 5.0000 12:21:56.90 +30:04:27.30 NGC 4308 ACIS-S NONE 5.0000 12:25:51.20 +27:33:41.60 NGC 4393 ACIS-S NONE 5.0000 12:25:55.60 +18:12:50.10 NGC 4394 ACIS-S NONE 5.0000 12:26:30.10 +08:52:20.00 NGC 4411 ACIS-S NONE 5.0000 12:26:47.20 +08:53:04.60 UGC 7546 ACIS-S NONE 5.0000 12:30:59.70 +08:04:40.60 NGC 4492 ACIS-S NONE 5.0000 12:36:56.40 +14:13:02.50 NGC 4571 ACIS-S NONE 5.0000 12:45:06.00 +03:03:20.60 NGC 4665 ACIS-S NONE 5.0000 12:47:45.60 +13:45:46.10 NGC 4689 ACIS-S NONE 5.0000 12:47:46.50 +04:20:09.90 NGC 4688 ACIS-S NONE 5.0000 13:00:39.10 +02:30:05.30 NGC 4900 ACIS-S NONE 5.0000 15:35:10.50 +16:32:58.00 UGC 9912 ACIS-S NONE 5.0000 21:29:59.60 +02:24:51.00 NGC 7077 ACIS-S NONE 5.0000 23:16:10.80 -42:35:05.40 NGC 7552 ACIS-S NONE 5.0000 23:28:43.40 -41:20:00.50 IC 5325 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08700654
Proposal Title: Rapid Follow-Up Observations of Tidal Disruption Events Discovered in the GALEX Deep Imaging Survey PI: Suvi Gezari
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Luminous UV/X-ray flares are predicted to occur when a star is tidally disrupted by a galaxy's central supermassive black hole, and some fraction of the tidal debris is accreted. The GALEX Deep Imaging Survey (DIS) has the ideal depth, wavelength coverage, and temporal sampling for detecting flares from tidal disruption events in the nuclei of galaxies over a large range of redshifts. We propose to continue our approved Chandra Cycle 7 TOO program to follow-up candidate tidal disruption flares discovered by GALEX. Chandra imaging is critical for measuring the temperature, luminosity, and lightcurve of the tidal disruption flares, which are direct probes of the mass of the central black hole. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- Tidal Disruption Eve ACIS-S NONE 30.0000 Tidal Disruption Eve ACIS-S NONE 30.0000 ==========================================================================================

Proposal Number: 08700664
Proposal Title: The X-ray emission mechanism and jet kinematics at the hot spots of radio galaxy 3C 445 PI: Markos Georganopoulos
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The X-ray emission mechanism and kinematics of the hot spots of radio galaxies remain unknown. We propose Chandra observations of 3C 445, a radio galaxy with near-IR hot spot detections. We will address the hot spot X-ray emission issue with a very clean test: If the X-ray image of the southern hot spot exhibits the fine structure of the near-IR image, this will argue for a synchrotron mechanism, while a broad X-ray image, similar to the radio image will indicate an inverse Compton origin. We will also use our observations, together with existing data, to infer the hot spot velocity profile by modeling the multiwavelength spectra of both the approaching and receding hot spots. Note that we are the only group with tools for modeling the emission from decelerating relativistic flows. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:23:49.60 -02:06:12.00 3C 445 ACIS-S NONE 50.0000 ==========================================================================================

Proposal Number: 08700723
Proposal Title: Chandra Imaging of the Highest Redshift Relativistic Jets PI: Teddy Cheung
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose Chandra imaging of 16 high-redshift (z=2.1-4.7) quasars with bright extended (>2.5'' long) radio jets to search for and study their X-ray counterparts. The radio sources are core-dominated, and their flat-spectrum indicate that relativistic beaming of the emission is important. These data will systematically probe the physics of relativistic jets at much higher-redshifts than studied with Chandra thus far. Also, the currently favored models -- synchrotron vs. inverse Compton (IC) scattering of the CMB -- predict vastly different X-ray fluxes for these jets at such high-redshifts. These observations may serve as a simple test of these models. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:37:22.40 +58:25:01.80 0833+585 ACIS-S NONE 4.0000 12:42:09.80 +37:20:05.70 1239+376 ACIS-S NONE 5.0000 14:21:07.70 -06:43:56.30 J1421-0643 ACIS-S NONE 3.5000 14:30:23.70 +42:04:36.50 1428+4217 ACIS-S NONE 10.5000 17:54:22.30 +67:37:35.80 J1745+6737 ACIS-S NONE 7.0000 ==========================================================================================

Proposal Number: 08700734
Proposal Title: Resolving the nature of PKS 1413+135 and its absorber PI: Eric Perlman
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The radio-loud AGN PKS 1413+135 has puzzled astronomers for decades, because of its small size, extreme IR spectral cutoff and apparent spiral host galaxy. HST, ASCA and VLBA observations suggest an elegant solution: the AGN is partially covered by a giant molecular cloud in the galaxy's disk. We propose Chandra observations to verify this hypothesis. The Chandra observations will allow us to obtain a 0.1" quality position for comparison with the radio source position, and will allow us to investigate the possibility that the X-ray spectrum as measured by ASCA was due to reprocessed and/or extended emission. We expect to see both absorption edges as well as Fe K-alpha emission, which will allow us to investigate connections between the source's youth and the nature of its host galaxy. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:15:58.80 +13:20:24.00 PKS 1413+135 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08700735
Proposal Title: Bent Jets in Brightest Cluster Galaxies PI: Nazirah Jetha
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Wide angle tailed radio galaxies (WATs) contain small kpc-scale jets that flare suddenly. The reason for this flaring is not understood, but previous Chandra observations suggest that it is due to the ISM/ICM interface. Here we propose observations of WATs with bent jets. Recent work suggests that high galaxy speeds are needed to bend the jets. If this is the case, then the ISM should be stripped, and jet flaring should not coincide with the interface. We intend to ascertain the presence of the ISM in bent WAT host galaxies, to determine if the interface is responsible for the jet flaring. This will enable a better understanding of the physics of AGN jets. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:39:37.20 +52:24:13.30 Abell 2220 ACIS-S NONE 35.0000 21:57:54.40 +09:01:05.50 Abell 2395 ACIS-S NONE 35.0000 ==========================================================================================

Proposal Number: 08700819
Proposal Title: The Circumnuclear X-Ray Environments of Highly Disturbed Seyfert Galaxies PI: Daniel Evans
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose 60 ks and 35 ks Chandra/ACIS-S observations of the optically disturbed circumnuclear narrow-line environments of the ``radio-loud'' Seyfert 2 galaxies Mrk 573 and IC 5063. We will use Chandra's superb spatial resolution to explore the complex relationship between the X-ray-emitting shock-heated gas, radio outflows, and optical line-emission. We will determine the role of shocks in imparting energy into the ambient ISM, assess the part that ionizing nuclear radiation plays in governing the narrow-line morphology, and constrain the energy budgets involved in creating such disturbed circumnuclear environments. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:52:02.30 -57:04:07.60 IC 5063 ACIS-S NONE 35.0000 ==========================================================================================

Proposal Number: 08700916
Proposal Title: The Definitive Chandra Observations of NGC 4258 PI: Michael Nowak
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose a 320 ksec HETG observation of NGC 4258. This will yield a high S/N nuclear spectra that is uncontaminated by extended emission or pileup. We will measure the fluorescent Kalpha line strength and width, search for low energy emission lines as expected in some ADAF models, and accurately measure the absorbing column. The latter may be probing the warped disk structure. We will search for nuclear flaring, as observed in Sgr A*. The S/N for observations of the `anomalous arms' will be increased over previous observations. The binary population will be surveyed down to an implied isotropic luminosity of 10^36 erg/s. Our observation will be coordinated with the VLA, to further test the "fundamental plane" of black hole radio/X-ray activity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:18:58.00 +47:18:14.00 NGC 4258 ACIS-S HETG 160.0000 12:18:58.00 +47:18:14.00 NGC 4258 ACIS-S HETG 160.0000 ==========================================================================================

Proposal Number: 08700989
Proposal Title: A Chandra survey of hybrid morphology radio sources PI: Brendan Miller
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe three HYbrid MOrphology Radio Sources (HYMORS): 3C 433, 4C+65.15, and 4C-02.02, each with a 40 ks ACIS-S observation (for a total of 120 ks of Chandra time). These radio-loud sources host an FR I jet spatially oriented in opposition to an FR II jet, and hence challenge the intrinsic nature of the FR I/FR II divide. An X-ray observation of one such HYMORS, PG 1004+130, has already proven useful for constraining specific models describing the HYMORS phenomenon. We will utilize the additional Chandra observations of 3C 433, 4C+65.15, and 4C-02.02 to investigate the physics of these sources and clarify the relationship between their observed radio morphology and X-ray properties. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 13:25:29.70 +65:15:13.00 4C+65.15 ACIS-S NONE 40.0000 21:23:44.50 +25:04:11.80 3C 433 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08701038
Proposal Title: HST/Chandra Monitoring of a Dramatic Flare in the M87 Jet PI: John Biretta
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: (abridged) Beginning in 2002, HST and Chandra monitoring of the M87 jet detected a dramatic flare in knot HST-1 located ~0.8" from the nucleus. Its brightness increased seventy-fold in the optical band before peaking in 2005; the X-rays show a similarly dramatic outburst. To our knowledge this is the first incidence of an optical or X-ray outburst from a jet region which is spatially distinct from the core source -- this presents an unprecedented opportunity to study the processes responsible for non-thermal variability and the X-ray emission. We propose five epochs of HST/ACS flux monitoring during Cycle 15, as well as seven epochs of Chandra/ACIS observation (5ksec each). At two of the HST/ACS epochs we also gather spectral information and map the magnetic field structure. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 12:30:49.00 +12:23:30.00 M87 ACIS-S NONE 5.0000 ==========================================================================================

Proposal Number: 08701041
Proposal Title: 70 Micron MIPS and Chandra ACIS-I Imaging of the IRAC Dark Field: Infrared AGN PI: Jason Surace
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Using the Infrared Array Camera on-board Spitzer, we have been able to discover a population of objects with mid-infrared variability on months-timescales and whose colors are characteristic of active galactic nuclei (AGN). We request 26 hours of imaging at 70um with MIPS and 100 ksec of x-ray imaging with ACIS of the IRAC Dark Field. This is an extragalactic field 15 arcminutes in diameter near the north ecliptic pole. Due to the periodicity of the observations, the Spitzer data are sensitive to variability on week timescales, ultimately spanning a baseline of five to seven years. This cannot be achieved with an ordinary science GO program, and this is the only mid-infrared dataset that will have this capability for the foreseeable future. (abridged from Spitzer proposal) Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:40:02.00 +68:59:45.00 IRAC Dark Field ACIS-I NONE 100.0000 ==========================================================================================

Proposal Number: 08701043
Proposal Title: Coordinated Spitzer/Chandra Observations of Gamma Ray Blazars PI: Ann Wehrle
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Through approved Spitzer Cycle 3 Proposal 30785, we will coordinate near-simultaneous Spitzer and Chandra observations of three gamma-ray blazars. The blazars have two-peaked spectral energy distributions, where the infrared peak is synchtrotron emission produced by relativistic electrons, and the x-ray-gamma-ray peak is inverse-Compton scattered emission. The observations will map out the shape of the SED and its changes with two sets of independent observations about six months apart. The Chandra observations are used to obtain x-ray fluxes and spectral indices which will indicate relative contributions of synchrotron and inverse-Compton emission. The Spitzer MIPS and Chandra observations need to be scheduled within a day of each other because the sources are highly variable. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:29:06.70 +02:03:08.50 3C273 ACIS-S HETG 2.0000 12:29:06.70 +02:03:08.50 3C273 ACIS-S HETG 2.0000 12:56:11.20 -05:47:21.50 3C279 ACIS-S HETG 2.0000 12:56:11.20 -05:47:21.50 3C279 ACIS-S HETG 2.0000 22:53:57.70 +16:08:53.50 3C454.3 ACIS-S HETG 2.0000 22:53:57.70 +16:08:53.50 3C454.3 ACIS-S HETG 2.0000 ==========================================================================================

Proposal Number: 08701046
Proposal Title: Search for strongly obscured AGN: support for INTEGRAL all-sky hard X-ray survey PI: Stephen Murray
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We are close to a completion of an all-sky hard X-ray survey with INTEGRAL that will provide unbiased statistics of nearby AGN, including strongly obscured ones. More than 70 INTEGRAL sources have already been identified with AGN; 6 of these, all strongly absorbed, were localized and identified with Chandra. We now propose to observe with Chandra the error boxes of another 13 INTEGRAL sources, candidate obscured AGN. This will help identify the sources, measure their absorption columns, and complete the INTEGRAL survey. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 02:46:37.00 -42:22:01.20 IGR J02020+0204 ACIS-S NONE 3.5000
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Proposal Number: 08800042
Proposal Title: The Complex X-ray Morphology of NGC 7618: A Major Group-Group Merger in the Local Universe? PI: Stephen Murray
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observse the cores of the nearby (74 Mpc) merging groups NGC 7618 and UGC 12491 with Chandra/ACIS-S to study the hydrodynamics of the group-group merger process. Group-group mergers play a key role in the formation of structure in the universe. Our goal is to map the thermodynamic parameters of the gas in the cores, search for evidence of shocks and other sharp surface brightness discontinuities, and study the effects of the merger on the central galaxies. An AO-1 snapshot of NGC 7618 revealed a sharp surface brightness discontinuity in the gas. This is likely due to a sharp discontinuity in the elemental abundance and is the result of `sloshing' of the core. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 23:18:40.80 +42:57:25.00 UGC 12491 ACIS-S NONE 35.0000 23:19:47.20 +42:51:07.00 NGC 7618 ACIS-S NONE 35.0000 ==========================================================================================

Proposal Number: 08800047
Proposal Title: An X-ray/lensing calibration of cluster mass estimates PI: Stephen Murray
Subject Category: CLUSTERS OF GALAXIES
Abstract: We have compiled the largest statistically complete sample of galaxy clusters with weak lensing mass estimates. 31 of the 36 clusters have already been observed with Chandra. With 60ks of Chandra observations, good quality X-ray data can be obtained for the remaining 5, creating a homogeneous X-ray/lensing dataset. For the first time, X-ray and weak lensing mass estimates will be cross-calibrated in a volume limited sample. This will facilitate many important results, including the measurement of systematic effects in the mass estimates and their effect on derived cosmological constraints; improved calibration of the X-ray observable - mass scaling relations; and accurate measurements of cluster baryon fractions. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 04:37:08.40 +00:43:40.80 RXJ0437.1+0043 ACIS-I NONE 12.0000 09:00:37.90 +20:54:57.60 Z2089 ACIS-I NONE 9.0000 13:11:45.60 +22:01:48.00 Z5768 ACIS-I NONE 10.0000 15:01:20.20 +42:20:38.40 Z7215 ACIS-I NONE 14.0000 ==========================================================================================

Proposal Number: 08800094
Proposal Title: AGN Feedback and Galaxy Formation in Cluster Cores PI: Brian McNamara
Subject Category: CLUSTERS OF GALAXIES
Abstract: Many cD galaxies in nearby clusters are accreting gas and experiencing star formation at cosmologically interesting rates. Some of the accreting gas is falling onto their supermassive black holes and driving AGN outbursts with enough power to regulate the level of accretion. If this is an important mode of galaxy formation, it could lead to the observed ratio of supermassive black hole mass to bulge mass found in nearby quiescent bulges. We propose to test this in three cDs whose bulges and black holes are currently growing at an unusually rapid rate. We intend to explore feedback processes in galaxy formation that may be shaping the luminosity function of galaxies. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:47:12.00 +76:23:12.00 RBS 797 ACIS-S NONE 40.0000 13:03:42.00 -24:14:46.00 Abell 1664 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08800200
Proposal Title: The Formation of X-ray Luminous Groups PI: John Mulchaey
Subject Category: CLUSTERS OF GALAXIES
Abstract: Recent XMM-Newton and HST observations suggest that many X-ray luminous groups at intermediate redshifts are still in the process of formation. We propose Chandra observations of two z=0.35 groups that appear to be in the earliest stages of collapsing. In particular, neither group contains a dominant early-type galaxy and both have X-ray and optical morphologies consistent with a recently collapsed system. Chandra's high spatial resolution will be used to cleanly separate out the emission of the individual galaxies from the more extended group component, allowing us to study the morphology of the intragroup gas in detail. The Chandra data will also be used to search for substructure and temperature variations in the hot gas, as might be expected for a system that has recently formed. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:48:41.90 +60:19:42.90 RXJ1648.7+6019 ACIS-S NONE 100.0000 ==========================================================================================

Proposal Number: 08800256
Proposal Title: Observations of a Distant X-ray Luminous Luminous Cluster of Galaxies PI: Melvlle Ulmer
Subject Category: CLUSTERS OF GALAXIES
Abstract: A key to understanding cluster evolution is to study distant clusters of galaxies in X-rays. We propose to observe with Chandra, XMM-Newton, and Spitzer Cl J1257+4738 (CL1257). CL1257 is the most distant (z=0.866) cluster found in the SHARC survey and the second most X-ray luminous cluster above z=0.85. The data will help to determine the global physical properties of CL1257 and its global dynamical state. With recent Gemini data we found 4 out of 6 cluster member galaxies to have [OII] 3727 emission lines, implying recent starburst activity. A compilation of luminosity versus redshift of known clusters above z=0.85 suggests that clusters do not reach their peak X-ray luminosity until z=0.9. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:57:09.70 +47:38:02.50 RXJ 1257+4738 ACIS-S NONE 40.0000 ==========================================================================================

Proposal Number: 08800394
Proposal Title: Cluster and AGN interaction in 2A 0335+096 PI: Jeremy Sanders
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to make an 86 ks observation of the bright, nearby galaxy cluster 2A 0335+096. The core the cluster shows a wealth of interesting substructure. A deep observation will enable us to make detailed comparisons of its central radio source with the surrounding gas, and examine an apparent shock-like feature. This will allow us to further examine the role of AGN heating in the cores of galaxy clusters. There are few targets as bright and nearby as this one, with such an active source and no deep observation. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 03:38:40.80 +09:58:05.60 2A 0335+096 ACIS-S NONE 86.0000 ==========================================================================================

Proposal Number: 08800398
Proposal Title: The cluster core of Abell 2204: AGN interaction and cold fronts PI: Jeremy Sanders
Subject Category: CLUSTERS OF GALAXIES
Abstract: Abell 2204 is one of the most X-ray luminous clusters in the local universe. We propose an 80 ks observation of the cluster to study the physics in the cluster core in detail. The main aim of the proposal is to accurately examine the role of AGN feedback in the dense cluster core, including bubbles and sound waves. We also wish examine the cold fronts in depth. Furthermore, this cluster is an excellent target for the gas mass fraction method of obtaining cosmological parameters. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 16:32:47.20 +05:34:32.10 Abell 2204 ACIS-I NONE 80.0000 ==========================================================================================

Proposal Number: 08800424
Proposal Title: IGM in galaxy groups with dominant elliptical galaxy; optically selected fossils PI: Habib Khosroshahi
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observe a well-defined sample of 6 redshift-selected local galaxy groups, selected from 2dfGRS; each dominated by a single giant elliptical galaxy. The observation will enable us to test the hypothesis that most of the galaxy merging which builds up giant ellipticals actually takes place in collapsed groups. If this hypothesis is true, then we expect the great majority of purely optically selected fossil groups to show group-scale X-ray emission. In addition this study will significantly increase the number of known fossil groups - which show remarkable differences in their IGM and dark matter properties compared to non-fossil groups and cluster - and establish an economic and efficient method for finding further systems. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:16:25.80 -27:07:05.00 Group ID 1635 ACIS-S NONE 20.0000 03:14:33.10 -34:07:42.00 Group ID 1635 ACIS-S NONE 10.0000 13:45:39.80 -05:30:33.00 Group ID 1404 ACIS-S NONE 10.0000 22:12:20.70 -25:18:29.00 Group ID 2515 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08800460
Proposal Title: A search for clusters around luminous radio-quiet FRI quasars PI: Andrew Fabian
Subject Category: CLUSTERS OF GALAXIES
Abstract: Most clusters have a central peak coinciding with a radio source, so searching for clusters underlying distant radio sources seems a promising method for finding distant clusters. Unfortunately the method has so far failed to find distant MASSIVE clusters. This could be because very powerful FRII radio sources have been targetted when the right population - FRI quasars - has not been studied. Most central cluster radio sources in the local Universe are of the FRI type and most quasars are radio quiet (or weak, as are FRI quasars). We propose to observe 5 FRI quasars over the redshift range 0.6-2.1 to search for underlying cluster emission. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 10:23:15.80 +36:04:35.40 7C1023+3604 ACIS-S NONE 20.0000 10:30:21.50 +43:09:07.80 7C1030+4309 ACIS-S NONE 20.0000 10:37:15.40 +46:50:14.30 7C1037+4650 ACIS-S NONE 20.0000 10:40:22.80 +44:49:36.70 7C1040+4449 ACIS-S NONE 20.0000 10:52:55.50 +45:47:49.10 7C1052+4547 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08800597
Proposal Title: The Active Galaxy Population in a Complex, Four-Way Merger at z = 0.84 PI: Lori Lubin
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose a joint Chandra/VLA program to map the active galaxy population in a complex merger of four groups at z = 0.84. Combined with supporting data, the Chandra and VLA observations will allow us to measure the properties of X-ray and radio sources over the full structure, study AGN/starburst host galaxies to determine what causes gas-fueling events, and determine the effect of dynamics on the nuclear activity and gas content of galaxies in an actively-forming cluster. Because galaxy environment changes dramatically during the course of vigorous assembly, active clusters offer us the unique opportunity to probe the physical effects on galaxies as they assemble into denser regions. As such, this survey will begin to constrain how large-scale processes influence galaxy-scale events. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:23:52.30 +04:22:34.20 Cl 0023+0423 ACIS-I NONE 50.0000 ==========================================================================================

Proposal Number: 08800638
Proposal Title: The Dynamics of the Unusually Violent Merger in Abell 2744 PI: Joshua Kempner
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observe A2744, a z=0.31 cluster undergoing an unusually violent merger, one of only a few with Mach number >2. The cluster hosts one of the most luminous known radio halos, powered by relativistic electrons accelerated in the merger. Combined with our recently obtained radio data and proposed optical spectroscopy of cluster galaxies, Chandra will allow us to put extremely tight constraints on the dynamical state of the cluster. We will measure the merger velocity using the subclusters' cool cores and the temperature enhancement in shocked gas, and will determine the dynamical state of the small infalling subcluster to the NW. Finally, we will determine the acceleration mechanism of the radio-emitting electrons using correlations between radio brightness and gas temperature. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:14:19.40 -30:23:29.50 Abell 2744 ACIS-I NONE 100.0000 ==========================================================================================

Proposal Number: 08800647
Proposal Title: Testing the merger-radio halo connection in the massive galaxy cluster RXCJ2003.5-2323 PI: Simona Giacintucci
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose 50 ks Chandra observation of the massive galaxy cluster RXCJ2003.5-2323. In this cluster we discovered a giant and powerful radio halo with an exceptional linear size of 1.4 Mpc and a clumpy/filamentary radio morphology. The cluster redshift (z=0.3171) is among the highest with a giant radio halo detection. In the framework of the turbulent re-acceleration scenario for the origin of giant radio halos, the presence of an ongoing major merger is required to explain the formation, size and high radio power of the halo source in RXCJ2003.5-2323. The proposed observation will allow us to test the expected highly disturbed dynamical state of the cluster and study in detail the radio - X-ray connection. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 20:03:30.40 -23:23:05.00 RXCJ2003.5-2323 ACIS-I NONE 50.0000 ==========================================================================================

Proposal Number: 08800709
Proposal Title: AGN Heating of Clusters and Restarting Radio Galaxies PI: Nazirah Jetha
Subject Category: CLUSTERS OF GALAXIES
Abstract: Heating by AGN is widely believed to be an important mechanism in solving the cluster centre `cooling flow problem', but direct observations of AGN heating are rare. We propose to observe the restarting radio source hosted by the BCG in the cluster Abell 695. This AGN is at the beginning of a duty cycle, and is feeding small young radio lobes which should be expanding supersonically and driving shocks into the ICM. This is the only cluster-centre source we are aware of where the radio and X-ray data are consistent with ongoing shock heating. We intend to search for signs of shock heating of the ICM, measure the temperature of any shocked material, and by comparison with systems such as Centaurus A, further our understanding of the important shock-heating phase of AGN cluster energy input. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:41:13.00 +32:24:59.00 Abell 695 ACIS-S NONE 90.0000 ==========================================================================================

Proposal Number: 08800737
Proposal Title: Abell 119: Cluster Mergers and the Origin of Narrow-Angle-Tail Radio Galaxies PI: Craig Sarazin
Subject Category: CLUSTERS OF GALAXIES
Abstract: Abell 119 has two parallel Narrow-Angle-Tail (NAT) radio galaxies projected near its center. Although the dynamic state of the cluster has been uncertain, our short Chandra image showed a central cold front and possible north merger shock, which suggest the cluster is near core passage in a merger. A longer Chandra observation will be used to derive the merger kinematics from the cold front and merger shock. We will determine if the NAT-ICM relative motion is due to galaxy orbits or the cluster merger, which are the two main theories. We will look for interactions between the NATs and the intracluster gas, and see if the NATs have displaced the ICM. We will determine if the large Faraday rotations of the NATs are due to a dense sheath around them or to a large intracluster magnetic field. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 00:56:16.10 -01:15:18.40 Abell 119 ACIS-I NONE 49.0000 ==========================================================================================

Proposal Number: 08800834
Proposal Title: The Nature of the Intracluster Medium at z=1.45 PI: Spencer Stanford
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to obtain Chandra imaging of a newly discovered massive galaxy cluster at z=1.45, currently the highest known for an X-ray selected cluster. The cluster was found in the XMM Cluster Survey using archival data, and confirmed spectroscopically using Keck. The new data would allow us to determine the temperature of the intracluster medium, its spatial structure, and if there is any contamination from point sources within or outside of the cluster. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:15:59.00 -17:38:05.00 XMM2215-1738 ACIS-S NONE 100.0000 ==========================================================================================

Proposal Number: 08800836
Proposal Title: The Core Dark Matter Profile of the Radio-Quiet Cluster A3827 PI: Luca Zappacosta
Subject Category: CLUSTERS OF GALAXIES
Abstract: Competing theoretical models of the radial profiles of dark matter halos reveal their differences especially in the central regions of the halos. Typically clusters that are observed to be relaxed on radial scales of several 100 kpc exhibit disturbed X-ray and radio morphologies within their cores. We have identified a promising target, A3827, that does not possess a central radio source and appears to be very relaxed from inspection of its XMM image. We propose a 50 ks observation to obtain a precise measurement of the radial mass profile down to ~0.015 r_vir, or as far down as Chandra reveals the cluster to be undisturbed. The radial profile will be compared to theoretical models, particularly pure NFW and adiabatic contraction, as well as profiles obtained for other clusters. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:01:53.80 -59:56:51.60 A3827 ACIS-S NONE 50.0000 ==========================================================================================

Proposal Number: 08800885
Proposal Title: Ripples, Fronts, Bubbles, and a Tunnel: A Deep Observation of Abell 262 PI: Elizabeth Blanton
Subject Category: CLUSTERS OF GALAXIES
Abstract: Analysis of a short Chandra observation of the cooling core cluster Abell 262 reveals several features that warrant further study. In the cluster center, both a bubble and tunnel are found coincident with radio emission from the central AGN. A possible ghost bubble is identified with low-frequency radio emission. A ripple or shock front feature has been revealed and may be due to a previous outburst from the radio source. We propose to study this ripple/front in detail, detect hot gas within the bubble and tunnel, search for additional ghost bubbles, and measure the cooling rate of the X-ray gas found in knot-like features in the cluster center that also emit optical line emission. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:52:46.50 +36:09:07.90 Abell 262 ACIS-S NONE 120.0000 ==========================================================================================

Proposal Number: 08800894
Proposal Title: LIVE - Life in Vicious Environments: Mergers, shocks and cold fronts in super-cluster members A1750, A3558, and A1644. PI: Daniel Hudson
Subject Category: CLUSTERS OF GALAXIES
Abstract: Understanding cluster mergers is imperative to our understanding of cluster formation. Our current understanding of the physics involved in mergers is poor because of the high resolution needed for such simulations and the lack of observational data. One of the most startling revelations of Chandra was the existence of cold fronts, the absence of strong shocks and lack of directly detected weak shocks. With its superior PSF Chandra is the best suited instrument for detecting sharp surface brightness and temperature discontinuities associated with shocks and cold fronts and making the necessary measurements to constrain the physical processes involved. We propose deep Chandra observations of the merging clusters A1750, A3558, and A1644. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:57:09.60 -17:24:36.00 Abell1644 ACIS-I NONE 52.0000 ==========================================================================================

Proposal Number: 08800933
Proposal Title: The Impact of Nuclear Outbursts on the Surrounding Atmosphere in the NGC5846 Group PI: William Forman
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose a deep ACIS-I observation of the NGC5846 galaxy group.The core of NGC5846 shows an X-ray cavity filled with radio emitting plasma, with "knots" of X-ray emission in the bright rim around the radio lobe, and several "edges" in its surface brightness distribution. We will measure the temperature structure in the rim of emission around the radio lobe, determine the mechanical power associated with the X-ray cavity, and measure the detailed temperature and entrophy structure of the gas in the core. Most importantly, since the gas in the group is cool (1 keV) we can measure accurately the temperature structure across the bright surface brightness edges to determine if these edges are due to shocks from the radio outburst or due to sloshing of the gas in the core. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 15:06:29.30 +01:36:20.00 NGC5846 ACIS-I NONE 90.0000 ==========================================================================================

Proposal Number: 08800951
Proposal Title: Hot Gas in Spiral-Dominated Groups: Evolution and the Formation of Halos PI: JAN VRTILEK
Subject Category: CLUSTERS OF GALAXIES
Abstract: The group environment --- the locus of the majority of galaxies in the present-day Universe --- is also a particularly suitable environment for the examination of one of the central processes of galaxian evolution: the presumptive merging of spirals to form ellipticals, which is in good part already over in rich clusters. We here propose to observe two spiral-dominated groups selected for their proximity, compactness, and X-ray brightness. Both have little or no Chandra data, which when obtained will clarify the presence, distribution, and amount of diffuse intragroup gas; examine its temperature and heavy element abundances as a clue to its origins; and relate the intragroup medium to the influences of individual galaxies. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:36:00.30 +33:58:12.90 HCG 92 ACIS-S NONE 100.0000 ==========================================================================================

Proposal Number: 08800952
Proposal Title: A Complete Baryon Census in a Nearby Galaxy Group PI: John Mulchaey
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose an ACIS-I mosaic of the NGC2563 group to study the X-ray properties of the group galaxies out to the virial radius of the system. The proposed observations will provide important observational constraints on the mechanisms that drive galaxy evolution in groups by allowing us to study how the properties of galaxies vary with distance from the group center, IGM and galaxy density. The Chandra data will allow us to study the hot ISM halos of individual galaxies as well as the more extended intragroup medium component, which combined with our existing optical and HI data will provide a complete census of all of the major baryonic components in the group. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 08:18:00.00 +20:49:42.20 NGC2563-P12 ACIS-I NONE 30.0000 08:18:50.80 +21:42:31.10 NGC2563-P11 ACIS-I NONE 30.0000 08:19:15.00 +21:20:56.80 NGC2563-P8 ACIS-I NONE 30.0000 08:19:15.10 +21:04:59.40 NGC2563-P6 ACIS-I NONE 30.0000 08:19:15.30 +20:49:00.40 NGC2563-P7 ACIS-I NONE 30.0000 08:19:17.70 +20:33:33.70 NGC2563-P13 ACIS-I NONE 30.0000 08:20:23.70 +20:49:01.60 NGC2563-P3 ACIS-I NONE 30.0000 08:20:23.70 +21:05:00.50 NGC2563-P1 ACIS-I NONE 50.0000 08:20:23.70 +21:20:57.90 NGC2563-P5 ACIS-I NONE 30.0000 08:21:32.10 +20:49:01.00 NGC2563-P2 ACIS-I NONE 30.0000 08:21:32.20 +21:04:60.00 NGC2563-P10 ACIS-I NONE 30.0000 08:21:32.30 +21:20:57.40 NGC2563-P4 ACIS-I NONE 30.0000 08:22:40.20 +21:02:03.90 NGC2563-P9 ACIS-I NONE 30.0000 08:23:16.40 +21:23:09.90 NGC2563-P14 ACIS-I NONE 30.0000 ==========================================================================================

Proposal Number: 08801033
Proposal Title: An X-ray/lensing calibration of cluster mass estimates PI: Stephen Murray
Subject Category: CLUSTERS OF GALAXIES
Abstract: We have compiled the largest statistically complete sample of galaxy clusters with weak lensing mass estimates. 35 of the 36 clusters in our sample have been observed, or are scheduled for observation with Chandra. We propose a 15ks Chandra observation of A1576 to complete the sample, creating a homogeneous X-ray/lensing dataset. For the first time, X-ray and weak lensing mass estimates will be cross-calibrated in a volume limited sample. This will facilitate many important results, including the measurement of systematic effects in the mass estimates and their effect on derived cosmological constraints; improved calibration of the X-ray observable - mass scaling relations; and accurate measurements of cluster baryon fractions. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:36:56.90 +63:11:16.80 A1576 ACIS-I NONE 15.0000 ==========================================================================================

Proposal Number: 08801039
Proposal Title: The Halo Structure of RCS2-2327.4-0204 PI: Michael Gladders
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose ACS, NICMOS, and Chandra observations of the extraordinary and newly discovered galaxy cluster: RCS2-2327.4-0204 at z=0.7. This cluster shows 3 or more arcs in ground-based imaging. The target cluster is selected from a large ongoing survey with a well-defined search volume, which allows us to compare our results to expectations from simulations. We will compare the lensing derived mass profiles to the X-ray equivalent measures; this will illuminate whether the dominant baryonic component is in equilibrium with the potential. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 23:27:28.00 -02:04:20.80 RCS 2327-0204 ACIS-S NONE 25.0000
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EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
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Proposal Number: 08900056
Proposal Title: Chandra Large Scale Survey of the NOAO Bootes Deep Field (A) PI: Stephen Murray
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We will survey part of the Northern NOAO Bootes Deep Field using 5 ksec ACIS exposures with the primary goal of mapping the cosmic web to redshift unity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:12:47.30 +34:30:00.00 Bootes3 40 ACIS-I NONE 5.0000 14:12:47.30 +34:46:00.00 Bootes3 50 ACIS-I NONE 5.0000 14:12:47.30 +35:01:60.00 Bootes3 60 ACIS-I NONE 5.0000 14:14:05.20 +34:30:00.00 Bootes3 39 ACIS-I NONE 5.0000 14:14:05.20 +34:46:00.00 Bootes3 49 ACIS-I NONE 5.0000 14:14:05.20 +35:01:60.00 Bootes3 59 ACIS-I NONE 5.0000 14:15:23.10 +34:30:00.00 Bootes3 38 ACIS-I NONE 5.0000 14:15:23.10 +34:46:00.00 Bootes3 48 ACIS-I NONE 5.0000 14:15:23.10 +35:01:60.00 Bootes3 58 ACIS-I NONE 5.0000 14:16:41.00 +34:30:00.00 Bootes3 37 ACIS-I NONE 5.0000 14:16:41.00 +34:46:00.00 Bootes3 47 ACIS-I NONE 5.0000 14:16:41.00 +35:01:60.00 Bootes3 57 ACIS-I NONE 5.0000 14:17:58.90 +34:30:00.00 Bootes3 36 ACIS-I NONE 5.0000 14:17:58.90 +34:46:00.00 Bootes3 46 ACIS-I NONE 5.0000 14:17:58.90 +35:01:60.00 Bootes3 56 ACIS-I NONE 5.0000 14:19:16.80 +34:30:00.00 Bootes3 35 ACIS-I NONE 5.0000 14:19:16.80 +34:46:00.00 Bootes3 45 ACIS-I NONE 5.0000 14:19:16.80 +35:01:60.00 Bootes3 55 ACIS-I NONE 5.0000 14:20:34.70 +34:30:00.00 Bootes3 34 ACIS-I NONE 5.0000 14:20:34.70 +34:46:00.00 Bootes3 44 ACIS-I NONE 5.0000 14:20:34.70 +35:01:60.00 Bootes3 54 ACIS-I NONE 5.0000 14:21:52.60 +34:30:00.00 Bootes3 33 ACIS-I NONE 5.0000 14:21:52.60 +34:46:00.00 Bootes3 43 ACIS-I NONE 5.0000 14:21:52.60 +35:01:60.00 Bootes3 53 ACIS-I NONE 5.0000 14:23:10.50 +34:30:00.00 Bootes3 32 ACIS-I NONE 5.0000 14:23:10.50 +34:46:00.00 Bootes3 42 ACIS-I NONE 5.0000 14:23:10.50 +35:01:60.00 Bootes3 52 ACIS-I NONE 5.0000 14:24:28.40 +34:30:00.00 Bootes3 31 ACIS-I NONE 5.0000 14:24:28.40 +34:46:00.00 Bootes3 41 ACIS-I NONE 5.0000 14:24:28.40 +35:01:60.00 Bootes3 51 ACIS-I NONE 5.0000 14:38:51.20 +34:30:00.00 Bootes3 1 ACIS-I NONE 5.0000 14:38:51.20 +34:46:00.00 Bootes3 11 ACIS-I NONE 5.0000 14:38:51.20 +35:01:60.00 Bootes3 21 ACIS-I NONE 5.0000 14:40:09.10 +34:30:00.00 Bootes3 2 ACIS-I NONE 5.0000 14:40:09.10 +34:46:00.00 Bootes3 12 ACIS-I NONE 5.0000 14:40:09.10 +35:01:60.00 Bootes3 22 ACIS-I NONE 5.0000 14:41:27.00 +34:30:00.00 Bootes3 3 ACIS-I NONE 5.0000 14:41:27.00 +35:01:60.00 Bootes3 23 ACIS-I NONE 5.0000 14:42:44.90 +34:30:00.00 Bootes3 4 ACIS-I NONE 5.0000 14:42:44.90 +34:46:00.00 Bootes3 14 ACIS-I NONE 5.0000 14:42:44.90 +35:01:60.00 Bootes3 24 ACIS-I NONE 5.0000 14:44:02.80 +34:30:00.00 Bootes3 5 ACIS-I NONE 5.0000 14:44:02.80 +34:46:00.00 Bootes3 15 ACIS-I NONE 5.0000 14:44:02.80 +35:01:60.00 Bootes3 25 ACIS-I NONE 5.0000 14:45:20.70 +34:30:00.00 Bootes3 6 ACIS-I NONE 5.0000 14:45:20.70 +34:46:00.00 Bootes3 16 ACIS-I NONE 5.0000 14:45:20.70 +35:01:60.00 Bootes3 26 ACIS-I NONE 5.0000 14:46:38.60 +34:30:00.00 Bootes3 7 ACIS-I NONE 5.0000 14:46:38.60 +34:46:00.00 Bootes3 17 ACIS-I NONE 5.0000 14:46:38.60 +35:01:60.00 Bootes3 27 ACIS-I NONE 5.0000 14:47:56.50 +34:30:00.00 Bootes3 8 ACIS-I NONE 5.0000 14:47:56.50 +34:46:00.00 Bootes3 18 ACIS-I NONE 5.0000 14:47:56.50 +35:01:60.00 Bootes3 28 ACIS-I NONE 5.0000 14:49:14.40 +34:30:00.00 Bootes3 9 ACIS-I NONE 5.0000 14:49:14.40 +34:46:00.00 Bootes3 19 ACIS-I NONE 5.0000 14:49:14.40 +35:01:60.00 Bootes3 29 ACIS-I NONE 5.0000 14:50:32.30 +34:30:00.00 Bootes3 10 ACIS-I NONE 5.0000 14:50:32.30 +34:46:00.00 Bootes3 20 ACIS-I NONE 5.0000 14:50:32.30 +35:01:60.00 Bootes3 30 ACIS-I NONE 5.0000 ==========================================================================================

Proposal Number: 08900073
Proposal Title: THE CHANDRA-COSMOS SURVEY PI: Martin Elvis
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose the Chandra-COSMOS survey which will provide an unprecedented combination of contiguous area, depth and resolution. 36 densely tiled observations will cover the central 0.7 sq.deg. COSMOS field to a uniform 200ksec depth. COSMOS explores the coupled evolution of galaxies, dark matter halos and AGNs (massive black holes) largely free of cosmic variance. COSMOS is a comprehensive survey including: HST, Spitzer, Subaru, VLT, Magellan, VLA, MAMBO, GALEX, & potentially EVLA & ALMA. Chandra resolution & sensitivity enables the study of large scale phenomena: (1) influence of the surrounding environment; (2) interaction between galaxies; (3) influence of groups and clusters: (4) BH growth and census; (5) star formation and stellar populations; (6) feedback from starbursts and AGNs. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 09:59:08.80 +01:57:24.10 C-COSMOS6-6 ACIS-I NONE 50.0000 09:59:08.80 +02:05:24.00 C-COSMOS5-6 ACIS-I NONE 50.0000 09:59:08.80 +02:13:23.90 C-COSMOS4-6 ACIS-I NONE 50.0000 09:59:08.80 +02:21:24.10 C-COSMOS3-6 ACIS-I NONE 50.0000 09:59:08.80 +02:29:24.00 C-COSMOS2-6 ACIS-I NONE 50.0000 09:59:08.80 +02:37:23.90 C-COSMOS1-6 ACIS-I NONE 50.0000 09:59:40.80 +01:57:24.10 C-COSMOS6-5 ACIS-I NONE 50.0000 09:59:40.80 +02:05:24.00 C-COSMOS5-5 ACIS-I NONE 50.0000 09:59:40.80 +02:13:23.90 C-COSMOS4-5 ACIS-I NONE 50.0000 09:59:40.80 +02:21:24.10 C-COSMOS3-5 ACIS-I NONE 50.0000 09:59:40.80 +02:29:24.00 C-COSMOS2-5 ACIS-I NONE 50.0000 09:59:40.80 +02:37:23.90 C-COSMOS1-5 ACIS-I NONE 50.0000 10:00:12.80 +01:57:24.10 C-COSMOS6-4 ACIS-I NONE 50.0000 10:00:12.80 +02:05:24.00 C-COSMOS5-4 ACIS-I NONE 50.0000 10:00:12.80 +02:13:23.90 C-COSMOS4-4 ACIS-I NONE 50.0000 10:00:12.80 +02:21:24.10 C-COSMOS3-4 ACIS-I NONE 50.0000 10:00:12.80 +02:29:24.00 C-COSMOS2-4 ACIS-I NONE 50.0000 10:00:12.80 +02:37:23.90 C-COSMOS1-4 ACIS-I NONE 50.0000 10:00:44.80 +01:57:24.10 C-COSMOS6-3 ACIS-I NONE 50.0000 10:00:44.80 +02:05:24.00 C-COSMOS5-3 ACIS-I NONE 50.0000 10:00:44.80 +02:13:23.90 C-COSMOS4-3 ACIS-I NONE 50.0000 10:00:44.80 +02:21:24.10 C-COSMOS3-3 ACIS-I NONE 50.0000 10:00:44.80 +02:29:24.00 C-COSMOS2-3 ACIS-I NONE 50.0000 10:00:44.80 +02:37:23.90 C-COSMOS1-3 ACIS-I NONE 50.0000 10:01:16.80 +01:57:24.10 C-COSMOS6-2 ACIS-I NONE 50.0000 10:01:16.80 +02:05:24.00 C-COSMOS5-2 ACIS-I NONE 50.0000 10:01:16.80 +02:13:23.90 C-COSMOS4-2 ACIS-I NONE 50.0000 10:01:16.80 +02:21:24.10 C-COSMOS3-2 ACIS-I NONE 50.0000 10:01:16.80 +02:29:24.00 C-COSMOS2-2 ACIS-I NONE 50.0000 10:01:16.80 +02:37:23.90 C-COSMOS1-2 ACIS-I NONE 50.0000 10:01:48.80 +01:57:24.10 C-COSMOS6-1 ACIS-I NONE 50.0000 10:01:48.80 +02:05:24.00 C-COSMOS5-1 ACIS-I NONE 50.0000 10:01:48.80 +02:13:23.90 C-COSMOS4-1 ACIS-I NONE 50.0000 10:01:48.80 +02:21:24.10 C-COSMOS3-1 ACIS-I NONE 50.0000 10:01:48.80 +02:29:24.00 C-COSMOS2-1 ACIS-I NONE 50.0000 10:01:48.80 +02:37:23.90 C-COSMOS1-1 ACIS-I NONE 50.0000 ==========================================================================================

Proposal Number: 08900380
Proposal Title: Discovering the absorbed AGN population responsible for the hard X-ray background PI: Simona Soldi
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: The X-ray background peaks around 30 keV and is supposed to be dominated by absorbed type 2 AGN. Up to now the majority of these sources have not been found. INTEGRAL provides an opportunity to detect highly absorbed sources. Deep extragalactic observations provide an efficient tool to shed light on this question by providing samples of new hard X-ray sources. Many new and up to now unidentified sources were found by our team in a deep extragalactic observation of 2.5 Msec in the Virgo region. We ask to observe two of these new sources for which Chandra will: provide a precise position (allowing for optical follow up), give a measurement of the absorption column density, provide an X-ray spectral description and provide an information on the redshift when the Fe lines are detected. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 13:05:19.00 +11:39:09.00 IGR J1305+1139 HRC-I NONE 5.0000 13:05:19.00 +11:39:09.00 IGR J1305+1139 ACIS-S NONE 20.0000 13:35:41.00 +07:09:58.00 IGR J1335+0710 HRC-I NONE 5.0000 13:35:41.00 +07:09:58.00 IGR J1335+0710 ACIS-S NONE 20.0000 ==========================================================================================

Proposal Number: 08900627
Proposal Title: AGN in the Cosmic Web: A Proto-Cluster at z=2.3 PI: Kirpal Nandra
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Steidel et al. (2005) have recently reported the discovery of a highly significant overdensity of galaxies at z=2.3 in the field of the QSO HS 1700+643 (z=2.72). Galaxies in this structure have on average twice the age and mass of comparable field galaxies, consistent with their early formation and rapid evolution in a dense environment. Enhanced interactions and mergers in this environment should also result in a higher AGN fraction, and we have tentative evidence for this based on archival (50ks) Chandra data. Here we propose deeper (200ks) ACIS-I observations to reach Seyfert luminosities at the proto-cluster redshift, and establish definitively whether or not dense large-scale structure environments trigger enhanced AGN activity. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 17:00:50.60 +64:11:29.10 HS 1700+643 ACIS-I NONE 40.0000 17:00:50.60 +64:11:29.10 HS 1700+643 ACIS-I NONE 160.0000 ==========================================================================================

Proposal Number: 08900745
Proposal Title: The Chandra Deep Proto-cluster Field: Black-Hole Growth and Feedback in Dense Environments PI: David Alexander
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Deep X-ray surveys have revolutionized our understanding of the growth of black holes (SMBH). But these surveys only sample low-density regions at high-z due to their limited solid angle. There is no comparably sensitive X-ray census of AGN in high-density regions at high-z. Such environments evolve into the most massive clusters at z=0, regions which exhibit remarkable trends in galaxy properties - which may reflect early interactions between SMBHs and their host galaxies. A survey of a proto-cluster at high-z would provide a unique view of the interplay of the growth of galaxies and their SMBHs. Here we propose a 400ks survey of the best-studied proto-cluster at high-z, to enable the first definitive study of the growth of SMBHs and their host galaxies in a dense, young, environment. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 22:17:35.90 +00:15:58.90 SSA22 Protocluster ACIS-I NONE 80.0000 22:17:35.90 +00:15:58.90 SSA22 Protocluster ACIS-I NONE 160.0000 22:17:35.90 +00:15:58.90 SSA22 Protocluster ACIS-I NONE 160.0000 ==========================================================================================

Proposal Number: 08900784
Proposal Title: The Duty Cycle of Supermassive Black Holes: X-raying Virgo PI: Tommaso Treu
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Nuclear accretion on to super-massive black holes (SMBHs) plays a key role in the evolution of their host galaxies, as inferred from the ubiquity of SMBHs and the correlations between BH mass, and host mass and velocity dispersion. A fundamental unadressed issue is the actual distribution of accretion rates; we propose snapshot observations of an unbiased sample of 84 early-type galaxies in the Virgo cluster. Together with joint Spitzer 24 um observations, and publicly available HST-ACS and UV data, this survey will probe low-level nuclear activity over four orders of magnitude in black hole mass, thereby delivering the first unbiased census of the duty cycle of local SMBHs. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 12:09:22.30 +13:59:33.10 9 ACIS-S NONE 5.4000 12:10:23.20 +10:11:17.60 21 ACIS-S NONE 5.4000 12:11:07.80 +14:16:29.80 33 ACIS-S NONE 5.4000 12:15:12.60 +14:25:59.10 140 ACIS-S NONE 5.4000 12:16:33.70 +13:01:53.10 200 ACIS-S NONE 5.4000 12:17:19.60 +11:56:36.20 230 ACIS-S NONE 5.4000 12:19:30.60 +14:52:41.40 355 ACIS-S NONE 5.4000 12:19:45.40 +12:47:54.30 369 ACIS-S NONE 5.4000 12:20:48.80 +17:29:13.40 437 ACIS-S NONE 5.4000 12:22:14.80 +07:10:00.80 538 ACIS-S NONE 5.4000 12:22:19.50 +14:45:38.60 543 ACIS-S NONE 5.4000 12:22:41.10 +07:57:01.10 571 ACIS-S NONE 5.4000 12:22:43.30 +08:11:53.70 575 ACIS-S NONE 5.4000 12:23:35.30 +16:43:22.30 654 ACIS-S NONE 5.4000 12:24:05.00 +11:13:06.00 698 ACIS-S NONE 5.4000 12:24:48.30 +18:11:42.00 751 ACIS-S NONE 5.4000 12:24:55.50 +11:42:15.00 759 ACIS-S NONE 5.4000 12:25:12.30 +14:45:43.80 778 ACIS-S NONE 5.4000 12:25:14.70 +15:36:27.20 784 ACIS-S NONE 5.4000 12:25:41.70 +12:48:38.00 828 ACIS-S NONE 5.4000 12:25:57.80 +10:03:12.80 856 ACIS-S NONE 5.4000 12:26:50.50 +09:35:02.00 944 ACIS-S NONE 5.4000 12:27:36.70 +08:09:14.80 1025 ACIS-S NONE 5.4000 12:27:40.50 +13:04:44.20 1030 ACIS-S NONE 5.4000 12:27:54.90 +08:05:25.20 1049 ACIS-S NONE 5.4000 12:28:03.90 +09:48:14.00 1062 ACIS-S NONE 5.4000 12:28:12.30 +10:17:51.00 1075 ACIS-S NONE 5.4000 12:28:14.90 +11:47:24.00 1087 ACIS-S NONE 5.4000 12:28:43.40 +11:45:21.00 1125 ACIS-S NONE 5.4000 12:28:57.60 +13:14:30.80 1146 ACIS-S NONE 5.4000 12:29:21.30 +08:09:23.00 1178 ACIS-S NONE 5.4000 12:29:23.40 +12:27:02.40 1185 ACIS-S NONE 5.4000 12:29:30.20 +07:59:34.00 1192 ACIS-S NONE 5.4000 12:29:35.00 +08:03:31.40 1199 ACIS-S NONE 5.4000 12:29:53.50 +14:04:07.00 1242 ACIS-S NONE 5.4000 12:29:59.10 +12:20:55.00 1250 ACIS-S NONE 5.4000 12:30:10.40 +10:46:46.10 1261 ACIS-S NONE 5.4000 12:30:17.40 +12:19:43.90 1279 ACIS-S NONE 5.4000 12:30:18.40 +13:34:40.90 1283 ACIS-S NONE 5.4000 12:30:40.60 +09:00:55.90 1303 ACIS-S NONE 5.4000 12:30:52.20 +16:45:32.60 1321 ACIS-S NONE 5.4000 12:30:57.60 +12:16:17.20 1327 ACIS-S NONE 5.4000 12:31:20.00 +14:06:53.50 1355 ACIS-S NONE 5.4000 12:32:02.70 +11:53:24.80 1407 ACIS-S NONE 5.4000 12:32:14.20 +10:15:05.00 1422 ACIS-S NONE 5.4000 12:32:23.40 +11:15:46.20 1431 ACIS-S NONE 5.4000 12:32:33.40 +15:24:55.20 1440 ACIS-S NONE 5.4000 12:33:05.00 +16:15:55.90 1475 ACIS-S NONE 5.4000 12:33:13.40 +09:23:49.80 1488 ACIS-S NONE 5.4000 12:33:13.80 +10:55:43.60 1489 ACIS-S NONE 5.4000 12:33:19.80 +12:51:12.80 1499 ACIS-S NONE 5.4000 12:33:34.60 +11:15:42.80 1512 ACIS-S NONE 5.4000 12:33:51.60 +13:19:21.30 1528 ACIS-S NONE 5.4000 12:34:06.10 +11:19:17.00 1537 ACIS-S NONE 5.4000 12:34:06.80 +12:44:30.10 1539 ACIS-S NONE 5.4000 12:34:11.50 +12:02:55.90 1545 ACIS-S NONE 5.4000 12:35:30.60 +12:13:15.40 1619 ACIS-S NONE 5.4000 12:35:37.30 +12:22:54.90 1627 ACIS-S NONE 5.4000 12:35:38.00 +12:15:50.50 1630 ACIS-S NONE 5.4000 12:36:24.80 +10:23:04.60 1661 ACIS-S NONE 5.4000 12:36:53.40 +07:14:47.00 1692 ACIS-S NONE 5.4000 12:36:54.90 +12:31:12.50 1695 ACIS-S NONE 5.4000 12:37:30.60 +09:33:18.80 1720 ACIS-S NONE 5.4000 12:38:06.80 +10:04:56.60 1743 ACIS-S NONE 5.4000 12:39:04.70 +14:43:51.50 1779 ACIS-S NONE 5.4000 12:40:11.20 +09:53:45.90 1826 ACIS-S NONE 5.4000 12:40:13.40 +12:52:29.00 1828 ACIS-S NONE 5.4000 12:40:19.60 +15:56:07.20 1833 ACIS-S NONE 5.4000 12:40:53.10 +10:28:34.00 1857 ACIS-S NONE 5.4000 12:40:58.50 +11:11:04.40 1861 ACIS-S NONE 5.4000 12:41:15.70 +11:23:13.50 1871 ACIS-S NONE 5.4000 12:41:32.70 +07:18:53.00 1883 ACIS-S NONE 5.4000 12:41:39.40 +12:14:52.40 1886 ACIS-S NONE 5.4000 12:41:52.00 +09:24:10.30 1895 ACIS-S NONE 5.4000 12:42:08.70 +11:45:14.90 1910 ACIS-S NONE 5.4000 12:42:10.70 +07:40:37.00 1913 ACIS-S NONE 5.4000 12:42:47.40 +11:26:33.00 1938 ACIS-S NONE 5.4000 12:42:58.00 +10:40:54.50 1948 ACIS-S NONE 5.4000 12:44:12.00 +12:56:30.10 1993 ACIS-S NONE 5.4000 12:44:31.90 +11:11:25.10 2000 ACIS-S NONE 5.4000 12:45:20.40 +13:41:33.00 2019 ACIS-S NONE 5.4000 12:47:15.30 +10:12:13.00 2048 ACIS-S NONE 5.4000 12:47:20.70 +12:09:58.70 2050 ACIS-S NONE 5.4000 12:52:17.50 +11:18:50.00 2092 ACIS-S NONE 5.4000 ==========================================================================================

Proposal Number: 08900955
Proposal Title: WHIM in Large-Scale Structures PI: Luca Zappacosta
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Simulations and observations indicate that galaxy overdensities are good tracers of the dark matter large-scale structures and therefore of the diffuse warm-hot phase (WHIM) that should be associated with them. The WHIM in these large-scale structures should have large column densities, and therefore should be much easier to detect than the low density WHIM probed so far through absorption line studies. However, this efficient method of investigating WHIM has yet to be exploited. We have identified 8 bright blazars located just in the background of 5 known superclusters. We propose to probe and study the WHIM in these structures by identifying the associated absorption lines in the spectrum of these AGNs during their outbursts, through TOO observations for a total of 200ks with HRC-S/LETG. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 01:23:08.90 +34:20:50.00 1ES 0120+340 HRC-S LETG 100.0000 02:32:48.60 +20:17:17.00 1ES 0229+200 HRC-S LETG 100.0000 10:15:04.20 +49:26:00.60 1ES 1011+496 HRC-S LETG 100.0000 12:15:11.00 +07:32:07.80 1ES 1212+078 HRC-S LETG 100.0000 16:53:52.20 +39:45:36.60 Mkn 501 HRC-S LETG 100.0000 22:02:43.30 +42:16:40.00 BL Lac HRC-S LETG 100.0000 23:23:52.50 +42:10:55.00 1ES 2321+419 HRC-S LETG 100.0000 23:59:07.80 -30:37:41.00 H 2356-309 HRC-S LETG 100.0000
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GALACTIC DIFFUSE EMISSION AND SURVEYS
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Proposal Number: 08910041
Proposal Title: ChICAGO GTO: Chandra Identification of Compact ASCA Galactic Objects PI: Stephen Murray
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: The Milky Way teems with thousands of X-ray sources, tracing a variety of exotic stellar populations. Most sources with X-ray fluxes >~1e-10 erg/cm^2/s were long ago identified as luminous X-ray binaries. In contrast, recent Chandra and XMM surveys have characterized the population for X-ray fluxes in the range ~5e-15 to ~5e-13 erg/cm^2/s. However, between these regimes lies a large population which is largely unidentified. We consequently propose to localize the compact, unidentified sources in the ASCA Galactic Plane Survey. We can then complete the demography of Galactic X-ray sources, from Sco X-1 down to the faintest sources known. These observations will also yield important new examples of active stars, magnetars, accreting systems, energetic pulsars, and young supernova remnants. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 15:53:31.70 -53:47:38.40 AX J155331-5347 ACIS-S NONE 2.3000 16:22:08.40 -50:05:42.00 AX J162208-5005 ACIS-S NONE 1.6000 16:22:47.00 -49:46:55.20 AX J162246-4946 ACIS-S NONE 2.8000 16:32:52.30 -47:46:08.40 AX J163252-4746 HRC-I NONE 2.5000 16:37:51.40 -46:56:38.40 AX J163751-4656 HRC-I NONE 1.3000 16:52:17.50 -44:14:06.00 AX J165217-4414 ACIS-S NONE 1.9000 17:04:44.60 -41:09:36.00 AX J170444-4109 ACIS-S NONE 2.9000 17:05:55.70 -41:04:58.80 AX J170555-4104 ACIS-S NONE 2.5000 17:19:10.30 -36:52:51.60 AX J171910-3652 ACIS-S NONE 2.5000 17:26:23.30 -35:16:48.00 AX J172623-3516 ACIS-S NONE 2.4000 17:26:42.70 -35:40:48.00 AX J172642-3540 HRC-I NONE 1.0000 17:35:18.20 -32:37:01.20 AX J173518-3237 ACIS-S NONE 1.6000 17:35:48.00 -32:07:12.00 AX J173548-3207 ACIS-S NONE 2.1000 17:36:28.10 -31:41:09.60 AX J173628-3141 ACIS-S NONE 2.6000 17:53:31.40 -25:38:38.40 AX J175331-2538 ACIS-S NONE 2.1000 18:08:16.80 -20:21:43.20 AX J180816-2021 ACIS-S NONE 2.2000 18:11:16.80 -18:28:15.60 AX J181116-1828 ACIS-S NONE 2.8000 18:11:20.60 -19:13:37.20 AX J181120-1913 ACIS-S NONE 2.3000 18:12:13.90 -18:42:25.20 AX J181213-1842 ACIS-S NONE 3.1000 18:17:05.30 -16:07:55.20 AX J181705-1607 ACIS-S NONE 2.7000 18:35:18.20 -07:54:39.60 AX J183518-0754 HRC-I NONE 3.0000 18:36:07.70 -07:56:34.80 AX J183607-0756 ACIS-S NONE 2.6000 18:40:08.40 -05:43:51.60 AX J184008-0543 ACIS-S NONE 1.7000 18:44:01.00 -03:55:33.60 AX J184400-0355 ACIS-S NONE 3.4000 18:44:47.00 -03:05:09.60 AX J184447-0305 ACIS-S NONE 2.8000 18:46:53.00 -02:40:26.40 AX J184652-0240 ACIS-S NONE 2.0000 18:55:51.80 +01:29:27.60 AX J185551+0129 HRC-I NONE 1.0000 18:57:50.90 +02:40:19.20 AX J185750+0240 ACIS-S NONE 2.1000 18:59:05.30 +03:33:43.20 AX J185905+0333 ACIS-S NONE 1.6000 19:05:34.80 +06:59:02.40 AX J190534+0659 ACIS-S NONE 2.0000 19:07:49.70 +08:03:32.40 AX J190749+0803 ACIS-S NONE 3.3000 19:08:14.40 +08:32:27.60 AX J190814+0832 ACIS-S NONE 3.4000 19:41:53.00 +22:51:43.20 AX J194152+2251 ACIS-S NONE 2.8000 19:49:51.60 +25:34:22.80 AX J194951+2534 HRC-I NONE 1.0000 ==========================================================================================

Proposal Number: 08910048
Proposal Title: High Resolution Studies of Interstellar Absorption with Cyg X-2 PI: Claude Canizares
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Recent studies have shown that a significant fraction of the interstellar medium (ISM) is ionized. High resolution studies of various bright X-ray binaries showed X-ray absorption features of the cool, warm, and hot ISM phases. We want re-visit the X-ray binary Cyg X-2 in a long cc-mode exposure for its bright soft X-ray spectrum as well as its location with respect to the Galactic plane. We plan to resolve the full fine structure of absorption near the O K, Fe L, and Ne K edges. In addition we will detect highly ionized lines not only at Ne, as previously done, but now also at O through the enhanced sensitivity of our observation. This allows us to determine ionization fractions for O and Ne at all phases as well as determine relative ionized abundances at high galactic lattitude. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 21:44:41.70 +38:19:10.60 Cyg X-2 ACIS-S HETG 150.0000 ==========================================================================================

Proposal Number: 08910231
Proposal Title: Accurate Determination of the Dust-Scattering Halo Around Cyg X-2 PI: Frederick Seward
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: In a short time, one million events can be collected from the bright dust-scattered halo around CYG X-2. The ACIS observation is the first serious attempt to observe azimuthal structure in a dust-scattering halo. If structure due to nonuniformity of the gas and dust permits, we will measure the quadrupole moment of the halo which might indicate scattering from partially-aligned non-spherical grains in the path to the source. Systematic instrument effects will be identified by observing at different roll angles. We will also extract the radial dependence of surface brightness from 5" to 15' in several energy bands and use these data to investigate the applicability of several dust models. Model parameters will be derived concerning size and spatial distribution of dust particles. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 21:44:41.20 +38:19:18.00 Cyg X-2 HRC-I NONE 2.5000 21:44:41.20 +38:19:18.00 Cyg X-2 HRC-I NONE 2.5000 21:44:41.20 +38:19:18.00 Cyg X-2 HRC-I NONE 2.5000 21:44:41.20 +38:19:18.00 Cyg X-2 HRC-I NONE 2.5000 21:44:41.20 +38:19:18.00 Cyg X-2 ACIS-S NONE 24.0000 ==========================================================================================

Proposal Number: 08910631
Proposal Title: Measuring the Dust Grains and Distance to X Persei Via Its X-ray Halo PI: Randall Smith
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose to observe the X-ray halo of the high mass X-ray binary pulsar X Per to measure interstellar dust grains along the line of sight (LOS) and to determine the distance to X Per. The X-ray halo is formed by scattering from grains along the LOS, which for X Per appear to be concentrated in one molecular cloud. Unlike many other X-ray halo observations, this low-absorption high-latitude sightline is well-characterized from absorption spectroscopy done with HST, Copernicus, and FUSE. This halo observation will measure the distance to the cloud and the dust size distribution in it. We will also be able to determine the distance to X Per by measuring the time delayed pulses in the X-ray halo. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 03:55:23.10 +31:02:45.00 X Persei ACIS-I NONE 50.0000 ==========================================================================================

Proposal Number: 08910934
Proposal Title: Combining X-ray Scattering with Extinction, Absorption, and Emission: Multiwavelength Constraints for Dust Grain Models PI: Lynne Valencic
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: While interstellar dust is vitally important to the Galaxy, being necessary both in stellar system and molecule formation, the grains' exact nature remains mysterious. An improved understanding of dust will lead to robust models that can more accurately recover an object's intrinsic spectral energy distribution, and will allow us to probe the grains' environment. Current grain models, constrained by UV-NIR regimes and elemental abundances, are degenerate; we must look to other wavelength regimes to break the degeneracy and thus produce more realistic models. X-ray dust halos observed with Chandra/ACIS are an excellent, and mostly untapped, grain characteristic diagnostic and can provide badly needed constraints on grain models. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 05:38:54.60 +26:18:56.80 HD 245770 ACIS-I NONE 70.0000 ==========================================================================================

Proposal Number: 08911036
Proposal Title: Chandra Identification of Compact ASCA Galactic Objects - Part II PI: Stephen Murray
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: X-ray sources in the Galactic plane trace a variety of exotic populations. Most sources with X-ray fluxes above 1e-11 erg/cm^2/s are well-known objects, while below 1e-13 erg/cm^2/s, AGN, CVs, and active stars dominate. However, many low-latitude sources lie between these two regimes, corresponding to young populations of pulsars, magnetars, hot stars, supernova remnants and star clusters. To derive the birth-rates, lifetimes and distributions of these relatively rare sources, we propose to localize the unidentified objects in the 60% of the Galactic disk covered by the ASCA Galactic Plane Survey. Combined with multi-wavelength follow-up and the results of previous surveys, this will complete the demography of Galactic X-ray sources, from Sco X-1 down to the faintest sources known. Grat- Exp. R.A. Dec. (J2000) Target Name Det. ing Time ----------------------------------------------------------------------------------- 14:31:49.00 -60:21:10.80 AX J143148-6021 ACIS-S NONE 2.5000 14:45:19.20 -59:49:48.00 AX J144519-5949 ACIS-S NONE 1.6000 14:45:47.00 -59:31:55.20 AX J144547-5931 ACIS-S NONE 2.6000 14:47:01.70 -59:19:48.00 AX J144701-5919 ACIS-S NONE 1.5000 15:41:22.10 -55:22:01.20 AX J154122-5522 ACIS-S NONE 2.2000 16:54:20.40 -43:37:40.80 AX J165420-4337 HRC-I NONE 1.4000 16:56:46.30 -42:39:36.00 AX J165646-4239 ACIS-S NONE 2.7000 17:00:18.00 -42:20:24.00 AX J170017-4220 ACIS-S NONE 1.5000 17:00:53.00 -42:10:30.00 AX J170052-4210 ACIS-S NONE 1.9000 17:01:13.00 -42:12:10.80 AX J170112-4212 HRC-I NONE 1.2000 19:46:22.30 +24:36:46.80 AX J194622+2436 ACIS-S NONE 1.4000 19:49:39.80 +26:31:48.00 AX J194939+2631 ACIS-S NONE 1.6000

The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA. Email: cxchelp@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2025. All rights reserved.

Chandra Cycle 8 Science Programs

Projects are grouped into the following categories.