Accepted Cycle 12 Observing Proposals

NORMAL GALAXIES DIFFUSE EMISSION & SURVEYS

Proposal Number	Subject Category	PI Name	Title
12610311	NORMAL GALAXIES: DIFFUSE EMISSION	Sun	A hot X-ray tail from a transforming galaxy in A3627
12610312	NORMAL GALAXIES: DIFFUSE EMISSION	Randall	Understanding AGN Feedback with Deep Observations of NGC 5813
12610520	NORMAL GALAXIES: DIFFUSE EMISSION	Forman	NGC4342, an Optically Faint but Unusually Gas-Rich Early-Type Galaxy
12610675	NORMAL GALAXIES: DIFFUSE EMISSION	HUMPHREY	Building a Chandra sample of Black Hole Masses
12610677	NORMAL GALAXIES: DIFFUSE EMISSION	Rigby	Does the brightest lensed galaxy contain an AGN?
12610697	NORMAL GALAXIES: DIFFUSE EMISSION	BUOTE	X-rays from Isolated Elliptical Galaxies
12620254	NORMAL GALAXIES: X-RAY POPULATIONS	Garcia	Monitoring M31 for BHXNe
12620290	NORMAL GALAXIES: X-RAY POPULATIONS	Fabbiano	CONSTRAINING THE TRANSIENT BLACK HOLE (BH) LOW-MASS X-RAY BINARY (LMXB) POPULATION
12620305	NORMAL GALAXIES: X-RAY POPULATIONS	Rappaport	Collisional Ring Galaxy Arp 148
12620342	NORMAL GALAXIES: X-RAY POPULATIONS	Maccarone	Understanding the variability of the first globular cluster black hole
12620381	NORMAL GALAXIES: X-RAY POPULATIONS	Mathur	Black-hole--galaxy co-evolution at the end of the Hubble sequence
12620389	NORMAL GALAXIES: X-RAY POPULATIONS	Sutton	The most luminous ULXs
12620489	NORMAL GALAXIES: X-RAY POPULATIONS	Heinke	An X-ray/Radio Test for an Intermediate-Mass Black Hole in M31's G1 Cluster
12620596	NORMAL GALAXIES: X-RAY POPULATIONS	Long	REMNANTS, BINARIES, AND DIFFUSE EMISSION IN THE NEARBY GRAND DESIGN SPIRAL M83
12620673	NORMAL GALAXIES: X-RAY POPULATIONS	Liu	The brightest ultraluminous X-ray sources across the sky
12620841	NORMAL GALAXIES: X-RAY POPULATIONS	Basu-Zych	Chandra Observations of Local Lyman Break Galaxy Analogs
12620858	NORMAL GALAXIES: X-RAY POPULATIONS	Williams	The Chandra Local Volume Survey
12620873	NORMAL GALAXIES: X-RAY POPULATIONS	Baganoff	Probing the Flaring Activity and Submillimeter Structure of Sgr A* with Chandra and 1.3mm VLBI

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 12610311

Title: A hot X-ray tail from a transforming galaxy in A3627

PI Name: Ming Sun

The ICM has long been proposed to play a vital role in galaxy evolution in clusters, through stripping of the galactic cold gas. Studies of gaseous tails behind cluster late-type galaxies have shed light on the energy transfer in the multi-phase gas, demonstrated by the recent discoveries of X-ray tails, intracluster star-formation and ULXs in the stripped gas. We propose a 95 ks ACIS-S observation of a surprisingly hot X-ray tail of ESO137-002 in A3627, as well as joint HST observations in three orbits. These observations aim to confirm the first hot X-ray tails in clusters, study the substructure in the X-ray tail (double tails? a possible extension to 100 kpc?), search for and study more intracluster ULXs and star formation. We have supporting data of optical spectroscopy, HI and CO.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
16:13:37.30	-60:52:26.70	ESO 137-002	ACIS-S	NONE	95

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 12610312

Title: Understanding AGN Feedback with Deep Observations of NGC 5813

PI Name: Scott Randall

NGC 5813 shows X-ray cavities and shocks from multiple AGN outbursts in an otherwise dynamically relaxed system. We propose a deep 500 ks observation of NGC 5813 to 1) measure the temperature structure across the inner shock to directly measure AGN feedback heating and compare with the outer shock, 2) better characterize the structure of the outermost cavities to study the evolution of the buoyantly rising bubbles, 3) better resolve the temperature and, in particular, abundance structure in the gas to measure its displacement due to AGN feedback, and 4) search for cavities from even older outbursts, beyond the currently detected outermost cavities. Joint observations with the VLA will allow a further exploration of the evolution of the radio properties of the buoyantly rising cavities.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
15:01:06.80	+01:40:44.70	NGC5813	ACIS-S	NONE	500

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 12610520

Title: NGC4342, an Optically Faint but Unusually Gas-Rich Early-Type Galaxy

PI Name: William Forman

NGC4342 is an optically faint galaxy in the outskirts of the Virgo cluster that hosts a remarkably luminous X-ray corona (compared to other galaxies of its stellar mass). The X-ray emission has a thermal spectrum and shows the characteristic head-tail signature of ram pressure stripping. NGC4342 appears to represent a class of optically faint, but hot gas-rich galaxies. With a deeper observation we will determine the nature of the ``edge'' and tail of NGC4342, understand the unusually large gas mass surrounding NGC4342, and determine the properties of the external medium that is providing the ram pressure. We will measure the gravitational potential, elemental abundances (on both sides of the edge) and iron mass.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
12:23:39.00	+07:03:14.00	NGC4342	ACIS-S	NONE	80

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 12610675

Title: Building a Chandra sample of Black Hole Masses

PI Name: PHILIP HUMPHREY

The relationships between the mass of black holes (Mbh) in galactic cores and the properties of the host galaxy provide provide a crucial test for structure formation models. However, there are only a limited number of ways of precisely measuring Mbh. In a pair of recent papers, we used a new technique, based on spatially-resolved Chandra spectroscopy, to constrain Mbh in four early-type galaxies, finding agreement with more traditional methods. We propose short, exploratory observations of four nearby galaxies that are promising targets for our new technique but are lacking Chandra coverage to determine if they are suitable objects in which to measure Mbh with deep follow-up observations.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
13:20:25.00	-20:36:39.60	NGC 5087	ACIS-S	NONE	50
12:52:50.80	-42:39:35.70	NGC 4751	ACIS-S	NONE	7.5
03:01:14.10	+44:53:50.40	NGC 1161	ACIS-S	NONE	7.5
08:45:08.30	-33:47:41.10	NGC 2663	ACIS-S	NONE	7.5

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 12610677

Title: Does the brightest lensed galaxy contain an AGN?

PI Name: Jane Rigby

We have recently discovered the brightest lensed galaxy known. Its high quality spectra are revealing a wealth of spectral diagnostics, providing a unique window on the physical conditions of star formation at the epoch when most stars formed. The caveat is that at present, we do not know whether this lensed galaxy hosts an AGN, which would throw off the nebular line diagnostics. We propose a 60 ks Chandra observation to measure or strictly constrain the X-ray luminosity of an active nucleus. We also propose 3 HST orbits to search for optical signs of an AGN.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
03:27:28.70	-13:26:14.30	RCS03	ACIS-I	NONE	60

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 12610697

Title: X-rays from Isolated Elliptical Galaxies

PI Name: DAVID BUOTE

The properties of dark matter halos on galactic scales remain a largely untapped resource for cosmological studies. X-ray observations offer potentially the most promising means to study dark matter in isolated elliptical galaxies, but there is presently a lack of known suitable candidates for study. Therefore, we propose a snapshot survey of 9 systems to identify isolated elliptical galaxies with X-ray properties similar to the best examples currently known. Deep follow-up exposures with XMM and Chandra of promising targets will then be sought for detailed analysis of their dark matter distributions.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
10:53:06.00	-40:19:44.60	ESO318-021	ACIS-S	NONE	7.5
18:16:49.40	-57:13:49.90	ESO182-007	ACIS-S	NONE	7.5
15:27:14.90	+77:09:24.60	UGC 09874	ACIS-S	NONE	7.5
12:15:40.80	+61:53:23.70	PGC 039222	ACIS-S	NONE	7.5
13:19:19.20	+08:25:44.90	NGC 5080	ACIS-S	NONE	7.5
10:37:02.70	+62:31:31.50	PGC 31499	ACIS-S	NONE	7.5
16:19:48.10	+05:09:43.90	PGC 57841	ACIS-S	NONE	7.5
10:44:19.00	+52:46:12.50	PGC 32033	ACIS-S	NONE	7.5
07:08:39.40	+61:18:18.90	PGC 20238	ACIS-S	NONE	7.5

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620254

Title: Monitoring M31 for BHXNe

PI Name: Michael Garcia

During A01-11 we found ~25 Black Hole X-ray Novae (BHXNe) in M31 using Chandra, and with HST follow-up have estimated orbital periods for 10 of these. Observations are under way with HST to attempt to estimate additional periods. We propose to continue this program concentrating our scarce HST resources on a single transient which exceeds 1e38 erg/s. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXNe (and other variables) in M31. Our GO+GTO programs have accumulated over 325ks ACIS-I exposure on the bulge within the 3' mirror sweet spot, and total Chandra exposure on M31 is now almost 1Msec. By continuing our monitoring program through a second decade we will reach ~800ks within 3' of the bulge.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
00:42:44.40	+41:16:08.30	M31	ACIS-I	NONE	25

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620290

Title: CONSTRAINING THE TRANSIENT BLACK HOLE (BH) LOW-MASS X-RAY BINARY (LMXB) POPULATION

PI Name: Giuseppina Fabbiano

Observations of X-ray transients have posed crucial constraints to the processes and evolution of accretion disks in LMXB populations. Yet, the data to constrain the transient behavior of the most luminous BH LMXBs does not exist to date. We propose to study this rare component of the LMXB population, by observing the giant Virgo elliptical NGC4649 with ACIS-S (twice for 100 ks each). The extraordinarily rich population of ~58 BH candidates with LX> 2 1038 erg s-1 (40 with LX> 3 1038 erg s-1) of this galaxy provides the ideal sample for this study.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
12:43:40.20	+11:33:08.90	NGC 4649	ACIS-S	NONE	100
12:43:40.20	+11:33:08.90	NGC 4649	ACIS-S	NONE	100

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620305

Title: Collisional Ring Galaxy Arp 148

PI Name: Saul Rappaport

We propose to observe the collisional ring galaxy Arp 148 for 55 ksec in order to study the luminosity function of ultraluminous X-ray sources ("ULXs"), especially at L_x > 10^{40} ergs/sec. The blue ring of star formation in Arp 148 is quite similar to that in Arp 147 which contains nine luminous X-ray sources. By contrast, the "intruder" galaxy in Arp 148 is rather more gas rich than the intruder in Arp 147, and numerous ULXs are also expected to be found there. We predict a gradient in source luminosity with position along the intruder galaxy in Arp 148, with the most luminous sources nearest the ring. Studies of galaxy collisions are important for the information they provide on (i) galaxy dynamics, (ii) triggers of star formation, and (iii) the origins of ULXs.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
11:03:54.00	+40:50:59.90	Arp 148	ACIS-S	NONE	55

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620342

Title: Understanding the variability of the first globular cluster black hole

PI Name: Thomas Maccarone

We propose a 20 kilosecond observation of the globular cluster RZ2109 in NGC~4472, along with a Gemini spectrum of 7.2 hours in duration. This globular cluster contains the first globular cluster black hole candidate which could not be alternatively explained as a superposition of bright neutron star X-ray binaries. In the past cycle, we were awarded time to point at the central region of NGC 4472, and did not detect this source, but we have also obtained recent [O III] observations which indicate that the cluster is still extremely bright in emission line flux. Our proposed observations with Chandra and Gemini should determine whether this source has turned off, or merely went through an episode of very high absorption.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
12:29:39.70	+07:53:33.00	RZ 2109	ACIS-S	NONE	20

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620381

Title: Black-hole--galaxy co-evolution at the end of the Hubble sequence

PI Name: Smita Mathur

Understanding the black hole-galaxy co-evolution has been an unsolved problem in galaxy research. The pure disk galaxies offer an unique opportunity to probe black hole growth in the absence of a bulge. We propose a survey to search for low-level nuclear activity in a sample of bulge-less galaxies with extensive multiwavelength coverage at high resolution. Our sample is well suited for understanding the relationship between the nuclear activity and galaxy properties such as star formation rate, cold gas fraction, central dust morphology, presence of a pseudobulge/star-cluster and the circular velocity. We will also investigate disk instability in the presence of a nuclear point mass. The proposed program thus has wide implications for understanding structure and evolution of galaxies.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
00:59:50.10	-07:34:41.00	NGC 0337	ACIS-S	NONE	10
18:33:52.60	+49:16:43.00	IC 1291	ACIS-S	NONE	10
01:05:04.90	-06:12:45.00	PGC 3853	ACIS-S	NONE	10
15:37:36.30	+05:58:24.00	NGC 5964	ACIS-S	NONE	10
11:26:40.40	+53:44:51.00	UGC 6446	ACIS-S	NONE	10
09:20:20.40	+64:06:10.00	NGC 2805	ACIS-S	NONE	10
10:35:23.20	-24:45:09.00	ESO 501-G023	ACIS-S	NONE	10
11:40:53.40	+56:12:07.00	NGC 3794	ACIS-S	NONE	10

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620389

Title: The most luminous ULXs

PI Name: Andrew Sutton

We propose Chandra observations of four of the most luminous ULX candidates in the nearby Universe. The proposed targets are selected from a cross correlation of the 2XMM and RC3 catalogues as the most luminous ULXs (> 5e40 erg/s) within 100 Mpc. The high luminosity of these sources places them amongst the most likely candidates for either harbouring elusive intermediate mass black holes or displaying highly super-Eddington accretion onto stellar mass black holes. We will use Chandra's unique imaging to obtain the best possible limits on whether the sources are single, accreting objects, and constrain possible counterparts. The proposed ACIS-S data will also allow us to identify X-ray spectral variations, providing further insight into the physics and nature of these extreme accretors.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
15:15:58.70	+56:18:10.90	2XMM J151558.6+561810	ACIS-S	NONE	30
02:40:25.60	-08:24:28.40	NGC 1042 ULX1	ACIS-S	NONE	30
13:44:04.20	-27:14:10.90	2XMM J134404.1-271410	ACIS-S	NONE	50
12:04:05.90	+20:13:45.00	2XMM J120405.8+201345	ACIS-S	NONE	5

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620489

Title: An X-ray/Radio Test for an Intermediate-Mass Black Hole in M31's G1 Cluster

PI Name: Craig Heinke

Dynamical studies have suggested the presence of an intermediate-mass black hole in the globular cluster G1 in M31. An X-ray source is consistent with G1's core, and a radio source has also been found in the cluster. The radio/X-ray flux ratio suggests a black hole mass of 500-19,000 Msun. However, the radio and X-ray data were taken two years apart; a variable X-ray binary could be mistakenly identified as an IMBH. We propose simultaneous Chandra and EVLA flux measurements of G1, to determine the simultaneous radio/X-ray flux ratio. The EVLA data will also produce a more accurate (>6x) localization of the radio source, confirming its location at the cluster center.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
00:32:46.50	+39:34:40.50	G1	ACIS-S	NONE	35

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620596

Title: REMNANTS, BINARIES, AND DIFFUSE EMISSION IN THE NEARBY GRAND DESIGN SPIRAL M83

PI Name: Knox Long

M83 is a nearby face-on grand-design spiral. With a high supernova rate, a starburst nucleus, and large numbers of high mass star clusters in the disk of the galaxy, it is a superb laboratory for understanding how the life cycle of stars and the interstellar medium interact to produce X-ray emission in normal galaxies. Here we propose a deep ACIS-S observation of M83. In addition to detailed spectral and temporal studies of the brightest 50 sources, we will relate the X-ray properties of the SNRs, XRBs, and diffuse X-ray emission to the local environment, using the underlying stellar population and/or distance from features like the spiral arms to constrain the progenitors of the sources, to test population models, and to explore the physical mechanisms responsible for diffuse emission.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
13:37:00.80	-29:51:58.60	M83	ACIS-S	NONE	750

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620673

Title: The brightest ultraluminous X-ray sources across the sky

PI Name: Jifeng Liu

Ultraluminous X-ray sources (ULXs) can be the long-sought intermediate mass black holes (IMBHs) or stellar mass black holes. The studies of the brightest ULXs above 1e40 erg/s are most illuminating on their nature, as demonstrated by the recent discovery of a Hyperluminous X-ray source (HLXs) above 1e42 erg/s. We have carried out a search of the brightest ULXs across the sky with the ROSAT all-sky survey, which leads to a sample of 36 brightest ULXs. Six ULXs in this sample were already observed with Chandra/ACIS and all turned out to be truly bright. Here we propose to observe with Chandra/ACIS the 30 ULXs in our sample not observed before. The new observations will increase the number of HLXs above 1e42 erg/s to about ten, and triple the number of known ULXs above 1e40 erg/s.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
02:24:41.40	-19:08:26.00	J022441.4-190826	ACIS-S	NONE	5
23:09:21.50	+00:45:40.00	J230921.5+004540	ACIS-S	NONE	5
11:46:11.50	+20:23:55.00	J114611.5+202355	ACIS-S	NONE	5
16:33:16.70	+35:20:10.00	J163316.7+352010	ACIS-S	NONE	5
05:20:18.30	-61:15:21.00	J052018.3-611521	ACIS-S	NONE	5
00:37:56.00	-09:15:00.00	J003756.0-091500	ACIS-S	NONE	5
00:33:59.20	-09:42:20.00	J003359.2-094220	ACIS-S	NONE	5
05:01:45.60	-18:09:37.00	J050145.6-180937	ACIS-S	NONE	5
08:48:02.20	+74:05:46.00	J084802.2+740546	ACIS-S	NONE	5
13:55:41.10	+40:27:06.00	J135541.1+402706	ACIS-S	NONE	5
13:57:02.80	+41:51:03.00	J135702.8+415103	ACIS-S	NONE	5
07:55:26.10	+39:11:11.00	J075526.1+391111	ACIS-S	NONE	5
22:36:56.50	-22:13:21.00	J223656.5-221321	ACIS-S	NONE	5
10:44:39.40	+38:45:41.00	J104439.4+384541	ACIS-S	NONE	5
22:40:17.70	+08:03:16.00	J224017.7+080316	ACIS-S	NONE	5

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620841

Title: Chandra Observations of Local Lyman Break Galaxy Analogs

PI Name: Antara Basu-Zych

Recent work on local galaxies has found that X-rays trace star formation. Our knowledge of star formation in the distant (z>1) Universe is confined to studies in the rest-frame ultraviolet. X-ray properties of the best-studied high redshift, UV-selected galaxies (Lyman Break galaxies, LBGs) have been deduced using stacking analyses of large samples of galaxies for long (>30 Ms) effective Chandra exposures. A new opportunity provides us with another way to study these star-forming galaxies: GALEX has recently selected a low-z (z~.08) LBG population, the supercompact UV Luminous Galaxies (ScUVLGs). With 170 ks of Chandra time, we can constrain the high end of the local X-ray/SFR correlation, measure dust attenuation in these galaxies, and put the higher-z studies on much firmer footing.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
08:23:55.00	+28:06:21.80	J082355.0+280621.8	ACIS-S	NONE	9
22:51:40.30	+13:27:13.40	J225140.3+132713.4	ACIS-S	NONE	19
00:21:01.00	+00:52:48.10	J002101.0+005248.1	ACIS-S	NONE	19
08:06:19.50	+19:49:27.30	J080619.5+194927.3	ACIS-S	NONE	20

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620858

Title: The Chandra Local Volume Survey

PI Name: Benjamin Williams

The accretion processes that power cosmic X-ray sources have been well-studied over the past several decades. However, the connection between X-ray sources and their parent stellar populations is still only vaguely understood. We propose to remedy this situation with a homogeneous X-ray survey of nearby large galaxies in a volume-limited sample with extensive Hubble Space Telescope (HST) imaging. The resolved stellar photometry from HST provides detailed measurements of the galaxies' star formation histories. We will tie these star formation histories to the measured X-ray source populations of these galaxies, providing crucial ingredients to the understanding of the formation and evolution of X-ray sources and galaxies.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
00:54:54.00	-37:41:04.00	NGC 300	ACIS-I	NONE	65
01:09:27.00	+35:43:04.00	NGC 404	ACIS-S	NONE	100

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 12620873

Title: Probing the Flaring Activity and Submillimeter Structure of Sgr A* with Chandra and 1.3mm VLBI

PI Name: Frederick Baganoff

We propose three 18-ks ACIS-I observations of the Galactic SMBH, SgrA*, with simultaneous NIR and 1.3-mm VLBI monitoring. SgrA* is the ideal target to understand accretion and outflow physics in the case of extremely low accretion rate onto a SMBH. The discovery of flares from SgrA* has provided exciting new perspectives for understanding the processes at work in the Galactic nucleus. They are very likely to be produced within 10 Schwarzschild radii and hence probe the environment near the ISCO. Recently, VLBI observations at 1.3 mm demonstrate that angular resolution comparable to the apparent size of the event horizon has been achieved. Therefore, we propose to perform simultaneous observations of SgrA* with Chandra and 1.3mm VLBI to constrain the location and dynamics of SgrA* flares.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
17:45:40.00	-29:00:28.00	Sgr A*	ACIS-I	NONE	18
17:45:40.00	-29:00:28.00	Sgr A*	ACIS-I	NONE	18

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