Chandra Cool Targets (CCT)
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There will be a planned electrical outage Friday, November 5 2021, 5:30PM - Saturday, November 6 2021, 6:00PM EDT. During this time period ChaSeR and other archive interfaces will be unavailable. - Electrical Outage on 07/28/21
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Chandra Cool Targets (CCTs)
The Chandra X-ray Observatory (CXO) is in a highly elliptical orbit that enables high observing efficiency and flexible pointing (avoiding the Sun, Moon, Earth and anti-sun direction). However, there are significant restrictions in the durations of observations at many solar pitch angles (i.e., angles between viewing directions and the direction to the sun). These restrictions are necessary to avoid overheating (or excessive cooling) of various observatory sub-systems.
In October 2018 the CXC issued a white paper call for lists of astrophysical objects, Cool Chandra Targets (CCTs) (formerly called Cool Attitude Targets (CATs)) that can be included in the schedule to provide spacecraft cooling. CCTs are intended to produce scientifically useful data while the observatory is cooling (i.e. the observatory will never be pointed at blank sky to cool off). The mission planning team started using CCTs for spacecraft cooling in December 2018. CCT data does not have associated proprietary time.
A list of the approved CCT programs, including the PI names, titles and abstracts can be found here.
| Obsid | Target | Inst | Time | Proposal |
|---|---|---|---|---|
| 22040 | 2MASXJ06411806+32493 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22039 | SWIFT J063107.4+1127 | ACIS-I | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22038 | LEDA136513 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22036 | PKS0528+134 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22037 | 2MASXJ05325752+1345092 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22041 | UGC3601 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22058 | PSRB0656p14_s7 | ACIS-S | 20 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22056 | SDSSJ085051.97+083026.6 | ACIS-S | 34 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 22059 | 2MFGC13496_s1 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22057 | UGC 10683 NED02 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22069 | 1RXS J174645.6+131844 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22067 | SDSSJ084339.24+053125.2 | ACIS-S | 25 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 22068 | HE0103-3447 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22066 | SDSSJ084437.69+051538.8 | ACIS-S | 10 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 22089 | UGC4211 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22090 | Z31-72 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22091 | SDSSJ084205.57+075925.5 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22088 | SDSSJ081331.13+040949.4 | ACIS-S | 27 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 22117 | PSRJ1023p0038_s2 | ACIS-S | 20 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22114 | SDSSJ103712.55+015444.0 | ACIS-S | 19 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 22115 | CGMW5-04382 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22116 | 2XMM J185348.4-010229 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22119 | 1E1841m045_s2 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22118 | Mrk417_s2 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22132 | IC0588_s3 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22133 | IC0588_s1 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22131 | PMN_J0948p0022_s3 | ACIS-S | 20 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22145 | 2HWC_J1928p178_s1 | ACIS-S | 19 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22169 | RMJ135424.7-010247.8 | ACIS-I | 10 | A random sub-sample of lambda=25-80 redMaPPer clusters |
| 22170 | B2.2 2104+24 | ACIS-S | 16 | X-Ray surveying radio-loud active galaxies and their large-scale environments |
| 22167 | LEDA138501 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22168 | 2MASXJ02141794+5144520 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22193 | B2.3 2254+35 | ACIS-S | 16 | X-Ray surveying radio-loud active galaxies and their large-scale environments |
| 22194 | IC 4316 | ACIS-I | 10 | ULX Science with Nearby Galaxies |
| 22190 | 2MASX J04123958+5825181 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22192 | B2.1 0536+33B | ACIS-S | 16 | X-Ray surveying radio-loud active galaxies and their large-scale environments |
| 22191 | J133331d15m012653d3_s1 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22208 | Cen_X4_s3 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22211 | Cen_X4_s4 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22209 | Cen_X4_s2 | ACIS-S | 20 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22210 | Cen_X4_s6 | ACIS-S | 20 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22226 | WISEJ144850.99-400845.6 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22227 | MCG-1-40-1 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22229 | J133331d15m012653d3_s1 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22252 | 2FGL_J1653d6m0159_s3 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22247 | PKS 0706-15 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22251 | NGC6240_s3 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22248 | ESO565-19 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22249 | ESO499-41 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22250 | 2MASXJ16504275p0436180_s2 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22261 | M33_MOS01_s6 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22267 | [HB89] 0834-201 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22269 | MCG_01_24_012_s2 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22268 | MCG-1-24-12 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 22270 | Mrk1419_s4 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22274 | 2RXS J184350.8-064920 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
| 22287 | Nova_Sgr_2015_2_s5 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22735 | 2MASX J21174162-0208341 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 22686 | 2RXS J211827.5-034050 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
| 22871 | UGC1479 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 23067 | Gaia DR2 38354680725946240 | ACIS-S | 10 | Measurements of Coronal Emission in the Hyades: We need more! |
| 23074 | B2.2 0143+24 | ACIS-S | 16 | X-Ray surveying radio-loud active galaxies and their large-scale environments |
| 23073 | SDSSJ013756.50+145606.4 | ACIS-S | 15 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 23098 | [HB89]0403-132 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 23105 | CLJ211235.8-574950 | ACIS-S | 30 | Enabling Dark Energy Constraints from Optically Selected Galaxy Clusters |
| 23110 | RBS1897 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 23109 | [HB89]0552+398 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 23112 | CLJ224301.1-515911 | ACIS-S | 19.5 | Enabling Dark Energy Constraints from Optically Selected Galaxy Clusters |
| 23111 | CLJ224301.1-515911 | ACIS-S | 10 | Enabling Dark Energy Constraints from Optically Selected Galaxy Clusters |
| 23125 | Gaia DR2 3365768477477718784 | ACIS-S | 20.6 | Measurements of Coronal Emission in the Hyades: We need more! |
| 23124 | MRCB1706-606 | ACIS-S | 20 | X-ray observations of the southern part of a complete sample of extragalactic radio sources |
| 23137 | 2RXS J080855.3+324908 | HRC-S/LETG | 29.3 | Stellar activity with TESS and Chandra |
| 23138 | SDSSJ083343.47+074654.4 | ACIS-S | 10 | Calibration of the quasar Hubble diagram with z <~ 0.7 quasars as CATs |
| 23143 | SDSSJ091421.52+045121.9 | ACIS-S | 21.3 | Defining a bona fide sample of intermediate-mass black holes: X-ray confirmation of optically selected AGN candidates |
| 23142 | SSTSL2J185600.55+153758.4 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23139 | RMJ084114.3+075843.6 | ACIS-I | 10 | A random sub-sample of lambda=25-80 redMaPPer clusters |
| 23167 | 1RXS J180312.7+045128 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23170 | HEP G054.038-00.045 | ACIS-I | 10 | Milky Way HEPCATs |
| 23169 | RMJ100750.4+003154.7 | ACIS-I | 10 | A random sub-sample of lambda=25-80 redMaPPer clusters |
| 23168 | PG_1001p054_s2 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 23166 | IC 5373 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23177 | LEDA64440 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23197 | 2RXS J105200.0-090427 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
| 23195 | SDSSJ110248.02+083404.2 | ACIS-S | 15 | Calibration of the quasar Hubble diagram with z < 0.7 quasars as CATs |
| 23196 | Mrk728 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23194 | SDSSJ102119.95+185213.8 | ACIS-S | 15 | Calibration of the quasar Hubble diagram with z < 0.7 quasars as CATs |
| 23192 | NGC4235 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23223 | NGC4 6300 | ACIS-I | 10 | ULX Science with Nearby Galaxies |
| 23275 | 2RXS J181151.6-480844 | ACIS-S | 10 | Stellar activity with TESS and Chandra |
| 23293 | 2RXS J201800.8-280751 | ACIS-S | 10 | Stellar activity with TESS and Chandra |
| 23336 | 1RXS J200830.7+002134 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23347 | 2RXS J195306.6-143610 | HRC-S/LETG | 10 | Stellar activity with TESS and Chandra |
| 23352 | HEP G055.856-03.802 | ACIS-I | 10 | Milky Way HEPCATs |
| 23348 | Mrk653 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23351 | UGC 07678 | ACIS-I | 10 | ULX Science with Nearby Galaxies |
| 23354 | 2RXS J204853.5+122220 | ACIS-S | 10 | Stellar activity with TESS and Chandra |
| 23364 | MASTER J2022+0746 | ACIS-S | 25 | X-ray Observations of Dwarf Novae Discovered by MASTER |
| 23362 | 2MASX J20442214-0957356 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 23363 | MACSJ2020.8-3002 | ACIS-I | 10 | The most X-ray luminous clusters of galaxies in the Universe |
| 23365 | 2RXS J200008.7+074536 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
| 24838 | 2RXS J012535.1+233030 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
| 24857 | Gaia DR2 3276738375272416256 | ACIS-S | 10 | Measurements of Coronal Emission in the Hyades: We need more! |
| 24861 | SDSSJ103315.71+525217.8 | ACIS-S | 10 | C-BASS: A Chandra Legacy Survey of AGN at the Highest Spatial Resolutions |
| 24891 | 2RXS J043116.0+421712 | ACIS-S | 10 | Stellar activity with TESS and Chandra |
| 24907 | 2RXS J202850.9+214103 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
| 24921 | GRB130925A_s2 | ACIS-S | 10 | Chandra-NuSTAR synergy in the NuSTAR serendipitous survey |
| 24972 | SDSSJ100438.82+151057.3 | ACIS-S | 10 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 24973 | SDSSJ110700.50+025844.9 | ACIS-S | 20 | Calibration of the quasar Hubble diagram with z <= 0.7 quasars as CATs |
| 24974 | 2RXS J105203.7+003243 | ACIS-S | 20 | Stellar activity with TESS and Chandra |
