Chandra X-Ray Observatory
	(CXC)

Short-term Schedule

Every week an observing request (OR) list is generated from the long term schedule (LTS) target list for that week, plus some unconstrained (pool) targets. This OR list is over-subscribed to allow an efficient schedule to be generated. The short-term schedule consists of those targets from the OR which will actually be observed; those targets not scheduled are then returned to the pool to be selected for future weeks.

The short-term schedule is the plan for a week's observing time. If there are no interruptions, all observations will be carried out close to the times listed. However, schedules can be interrupted by TOO observations, by solar-flare particle events, and by operational difficulties. This schedule is not a guarantee that the observation will occur when indicated.

NB: RA and DEC listings are for the star tracker, not the target position!

The RA and DEC on the short term pages are derived from the spacecraft quaternion. So the coordinates are that of the aspect camera, not the HRMA. The offset between the two coordinate systems is roughly 1.5 arcminutes in both y and z.

There is a link to previous weeks' short-term schedules at the bottom of this page.

JUN2121A


Seq #     ObsID Constr.    Target              Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew
----------------------------------------------------------------------------------------------------------------------------
601544    25080 0     ESO 497- G 003 2021:172:06:15:01.298   9.3 ACIS-I NONE 135.4138 -24.7704 226.17  65.37 109.40 dss pspc rass
402298    25079 0        4U 1543-475 2021:172:09:23:06.003  28.0 ACIS-S HETG 236.7542 -47.6559 300.86 144.17  79.10 dss pspc rass
 ----     46271       CAL-ER (IAT03) 2021:172:17:43:35.049   0.9   --    --  134.4049 -21.5308 237.00  62.13  82.43   
790365    24597 2             MKN421 2021:172:18:30:03.027  22.7 ACIS-S LETG 166.1215  38.2552 248.99  64.98  68.77 dss pspc rass
990032    25018 0 Cold ECS Blank Sky 2021:173:01:18:29.490  12.0  HRC-S NONE 269.4857  66.8443 181.96  89.74  64.68 dss pspc rass
 ----     46270       CAL-ER (CTI07) 2021:173:05:10:14.585   1.0   --    --  271.3375  -7.7183 178.18 164.29  74.61   
 ----     46269       CAL-ER (CTI04) 2021:173:05:57:34.891   3.0   --    --  292.3223 -14.4317 117.12 157.81  68.27   
 ----     46268       CAL-ER (PER02) 2021:173:07:15:33.175   3.0   --    --  337.0000  20.0000 120.83 102.31  56.12   
 ----     46267       CAL-ER (PER05) 2021:173:08:33:30.768   3.0   --    --  292.8014 -14.7969 116.05 157.65  56.07   
 ----     46266       CAL-ER (PER01) 2021:173:12:00:00.000   3.0   --    --  261.5000 -14.0000 226.00 166.92 120.30   
790365    25075 2             MKN421 2021:173:15:16:58.730  34.0 ACIS-S LETG 166.1215  38.2551 248.99  64.29 102.90 dss pspc rass
503279 P1 24706 0           SN 2005V 2021:174:01:12:21.555   5.0 ACIS-S NONE  94.5426  78.3514 350.11  54.97  59.46 dss pspc rass
503221    23546 1     PSR J1813-1749 2021:174:03:17:44.882  20.0 ACIS-S NONE 273.4210 -17.8239 175.01 174.22 119.50 dss pspc rass
402245    23467 1            M82 X-2 2021:174:09:33:12.241   5.0  HRC-I NONE 148.9074  69.6922 297.05  56.89 119.80 dss pspc rass
790366    24598 1             MKN421 2021:174:11:21:05.544  29.0 ACIS-S LETG 166.1117  38.2574 258.00  63.62  40.74 dss pspc rass
503210    24255 0         Kepler SNR 2021:174:20:04:12.102  25.0 ACIS-S HETG 262.6664 -21.4652 256.00 170.73 109.24 dss pspc rass
790366    25076 1             MKN421 2021:175:03:40:38.672  30.3 ACIS-S LETG 166.1112  38.2588 258.00  63.08 109.24 dss pspc rass
 ----     46265       CAL-ER (IAT02) 2021:175:12:43:13.241   0.9   --    --  257.3954 -13.4944 234.00 162.06  99.34   
201285    22981 0       Westerlund 1 2021:175:13:33:55.429  22.1 ACIS-I NONE 251.7303 -45.8559 313.78 151.57  87.84 dss pspc rass
 ----     46264       CAL-ER (CTI06) 2021:175:20:16:41.011   1.0   --    --  257.3954 -13.4944 234.00 161.80  87.84   
 ----     46263       CAL-ER (CTI05) 2021:175:20:58:20.904   3.0   --    --  223.0774  12.2309 234.16 119.12  42.66   
 ----     46262       CAL-ER (PER06) 2021:176:00:30:00.000   3.0   --    --  149.6629  52.3969 282.23  51.09  70.27   
 ----     46261       CAL-ER (PER07) 2021:176:05:00:00.000   1.0   --    --  124.8452 -30.8939 209.00  61.86 111.63   
201285    25073 0       Westerlund 1 2021:176:06:44:38.222  35.0 ACIS-I NONE 251.7318 -45.8563 313.78 151.22  89.46 dss pspc rass
704193    23781 2      QSOJ1131-1231 2021:176:17:00:28.395  30.0 ACIS-S NONE 172.9649 -12.5066 244.65  84.71  76.51 dss pspc rass
704149    23737 2             Sgr A* 2021:177:01:55:28.685  22.6 ACIS-S NONE 266.3933 -28.9937 299.99 170.56  87.77 dss pspc rass
704256 P1 24715 0 J103312.84+110555.3 2021:177:08:53:01.024   4.4 ACIS-S NONE 158.3047  11.1244 242.00  61.13 114.18 dss pspc rass
790367    24599 1             MKN421 2021:177:10:31:03.624  30.0 ACIS-S LETG 166.1118  38.2570 258.00  61.27  33.94 dss pspc rass
503210    25074 0         Kepler SNR 2021:177:19:30:50.182  28.0 ACIS-S HETG 262.6665 -21.4656 256.00 167.93 109.24 dss pspc rass
790367    25077 1             MKN421 2021:178:03:57:16.753  30.1 ACIS-S LETG 166.1113  38.2586 258.00  60.69 109.24 dss pspc rass
 ----     46260       CAL-ER (CTI03) 2021:178:12:57:55.448   3.0   --    --  261.5454 -14.0750 234.43 163.25 102.96   
 ----     46259       CAL-ER (CAL01) 2021:178:14:13:44.822   3.0   --    --  223.0774  12.2309 235.68 116.91  46.35   
 ----     46258       CAL-ER (PER08) 2021:178:15:41:29.303   4.0   --    --  209.1218 -72.5713 284.50 118.92 100.09   
 ----     46257       CAL-ER (CAL01) 2021:178:16:56:39.303   4.0   --    --  209.1218 -72.5713 284.50 118.91   0.00   
 ----     46256       CAL-ER (CAL01) 2021:178:18:11:49.303   4.0   --    --  209.1218 -72.5713 284.50 118.89   0.00   
 ----     46255       CAL-ER (PER04) 2021:178:21:00:00.000   1.0   --    --  128.8490 -31.6168 213.33  62.95  57.10   
402191    25022 1    IGR J16318-4848 2021:178:22:31:42.359  25.0 ACIS-S HETG 247.9168 -48.8055 307.97 145.85  83.00 dss pspc rass


JUN1421A


Seq #     ObsID Constr.    Target              Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew
----------------------------------------------------------------------------------------------------------------------------
 ----     46290       CAL-ER (IAT01) 2021:165:00:27:52.853   0.9   --    --  141.8055 -73.5650 234.80 104.25  51.62   
901425    22518 0        JWST-DTDF-1 2021:165:01:35:34.651  16.6 ACIS-I NONE 260.7380  65.8344 185.96  90.94 164.31 dss pspc rass
 ----     46289       CAL-ER (CTI01) 2021:165:06:44:31.752  11.0   --    --  267.1909  -9.8775 162.22 165.92  78.05   
 ----     46288       CAL-ER (PER01) 2021:165:10:29:07.784   3.0   --    --   56.0000  71.0000  32.53  50.16 115.95   
 ----     46287       CAL-ER (PER02) 2021:165:12:00:22.212   6.0   --    --  271.2823 -10.2081 149.15 164.61 115.83   
 ----     46286       CAL-ER (CAL01) 2021:165:14:21:36.813   3.0   --    --   56.0000  71.0000  32.72  50.18 115.85   
 ----     46285       CAL-ER (CTI02) 2021:165:15:53:24.800   0.9   --    --  266.1035 -12.1598 165.25 168.49 118.35   
901425    25062 0        JWST-DTDF-1 2021:165:17:13:12.144  53.0 ACIS-I NONE 260.7391  65.8347 185.96  90.88  79.74 dss pspc rass
990031    25017 0 Cold ECS Blank Sky 2021:166:08:08:43.582  22.0  HRC-S NONE 269.4822  66.8409 174.64  89.78   4.92 dss pspc rass
601513    23612 1          M33-North 2021:166:14:46:40.292   5.0 ACIS-I NONE  23.5517  30.7390  90.99  53.70  72.50 dss pspc rass
590607    25026 1           G21.5-09 2021:166:16:49:45.656  10.0  HRC-S NONE 278.4069 -10.5731 134.64 161.31 109.15 dss pspc rass
201397    23410 1              WR 97 2021:166:20:20:55.945  10.0 ACIS-S NONE 264.2009 -34.0525   0.07 169.23 130.52 dss pspc rass
503251    24266 0      SNR 0519-69.0 2021:166:23:40:11.018  25.0 ACIS-S NONE  79.9533 -69.0255 175.98  92.37  76.88 dss pspc rass
201285    22980 0       Westerlund 1 2021:167:07:07:09.149  25.0 ACIS-I NONE 251.7459 -45.8614 330.79 155.14  66.61 dss pspc rass
601514    24458 0 [DAG2016] PSZ1-ARC G 2021:167:14:31:06.149  24.3 ACIS-S NONE 237.4045 -78.1819 329.30 123.66  34.77 dss pspc rass
 ----     46284       CAL-ER (CTI03) 2021:167:21:42:19.157  10.0   --    --  265.8794 -35.1265   2.69 168.21  45.36   
 ----     46283       CAL-ER (PER04) 2021:168:01:10:27.647   0.9   --    --   86.0000 -28.0000 180.68  51.37 116.89   
 ----     46282       CAL-ER (PER03) 2021:168:02:08:01.696   5.0   --    --  143.6352  36.8234 267.98  51.30 118.73   
 ----     46281       CAL-ER (CAL01) 2021:168:04:13:15.917   0.9   --    --   86.0000 -28.0000 180.54  51.38 118.82   
 ----     46280       CAL-ER (CAL01) 2021:168:05:10:25.264   5.0   --    --  265.8794 -35.1265   1.33 168.24 116.88   
 ----     46279       CAL-ER (CAL01) 2021:168:07:27:44.492   0.9   --    --  267.0000 -10.0000 174.79 166.57 173.19   
901425    22519 0        JWST-DTDF-1 2021:168:08:45:50.945  23.0 ACIS-I NONE 260.7414  65.8352 185.96  90.72  76.29 dss pspc rass
704219 P1 23807 0      WFI 2033-4723 2021:168:15:56:09.667  15.0 ACIS-S NONE 308.4300 -47.4192  72.00 138.66 141.65 dss pspc rass
402296    25041 2     MAXI J1803-298 2021:168:20:29:58.038  12.5 ACIS-S HETG 270.7465 -29.8501  30.99 172.37  37.59 dss pspc rass
503283 P1 24710 0          SN 2009dq 2021:169:00:34:39.476  15.0 ACIS-S NONE 152.2332 -67.0101 221.02 102.59  93.86 dss pspc rass
402296    25063 2     MAXI J1803-298 2021:169:05:21:00.907  12.5 ACIS-S HETG 270.7460 -29.8507  30.99 172.55  93.86 dss pspc rass
 ----     46278       CAL-ER (IAT02) 2021:169:09:43:27.995   0.9   --    --  263.7783 -16.3892 201.96 172.46 173.78   
503295    25050 0          AT2020mrf 2021:169:10:29:15.741  20.0 ACIS-S NONE 236.9967  44.6730 208.99 106.70  65.76 dss pspc rass
601508    23607 1          M33-South 2021:169:16:40:19.095   5.0 ACIS-I NONE  23.4779  30.5839  99.26  56.47 100.00 dss pspc rass
503173    22450 1          SN2020tcw 2021:169:18:42:38.260  48.0 ACIS-S NONE 232.0872  39.9680 213.91 108.69 105.69 dss pspc rass
503295    25064 0          AT2020mrf 2021:170:08:21:28.260  18.2 ACIS-S NONE 236.9934  44.6697 208.99 106.34   6.15 dss pspc rass
 ----     46277       CAL-ER (CTI04) 2021:170:13:54:20.194   3.0   --    --  262.4735 -13.8891 208.23 169.11  63.33   
 ----     46276       CAL-ER (PER05) 2021:170:15:31:51.013   1.0   --    --  266.6676 -35.0794 353.39 168.27 144.06   
 ----     46275       CAL-ER (CAL01) 2021:170:16:29:55.604   0.9   --    --   84.9364 -28.4063 176.23  51.92 116.59   
 ----     46274       CAL-ER (CAL01) 2021:170:17:19:05.670   3.0   --    --   35.0000  10.0000 111.95  52.39  80.93   
 ----     46273       CAL-ER (CAL01) 2021:170:18:42:26.312  10.0   --    --   84.5082 -27.3281 175.57  50.89  80.30   
 ----     46272       CAL-ER (CAL01) 2021:170:21:59:43.016   1.0   --    --  306.0000 -83.0000  39.76 118.89  68.00   
703980    22594 2             Sgr A* 2021:170:23:54:25.567  20.0 ACIS-S NONE 266.3915 -29.0104 341.04 174.10  59.46 dss pspc rass
503264 P1 23589 0  4FGL J0854.8-4504 2021:171:06:04:20.284  10.0 ACIS-I NONE 133.7127 -45.0527 221.22  79.77  94.85 dss pspc rass
503238 P1 23563 0          SN 2011jm 2021:171:09:22:21.841  10.0 ACIS-S NONE 193.7126   2.6785 245.32 102.47  71.37 dss pspc rass
503242 P1 23567 0          SN 2005cz 2021:171:12:40:28.228  15.0 ACIS-S NONE 189.3521  74.2140 253.58  70.28  71.73 dss pspc rass
704273 P1 24732 0           NGC 3258 2021:171:17:31:34.473  21.3 ACIS-I NONE 157.1828 -35.5621 238.39  87.15 115.22 dss pspc rass
703981    22595 2             Sgr A* 2021:172:00:01:52.589  20.0 ACIS-S NONE 266.3908 -29.0071 332.60 173.71  89.11 dss pspc rass


Previous weeks' short-term schedules.

Last modified: 06/18/21



Smithsonian Institute Smithsonian Institute

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 © 1998-2019. All rights reserved.