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.

MAY1925A


Seq #  NB  ObsID Constr.          Target                Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew   Overlays
------ --- ----- ------- -------------------- --------------------- ----- ------ ---- -------- -------- ------ ------ ------ -------------
590783     29607    1           SNR G21.5-0.9 2025:139:00:42:53.207  10.0  HRC-I NONE 278.4036 -10.5823 107.68 137.93 123.18 dss pspc rass
705012     30735    0            FRB20220914A 2025:139:04:04:15.703  25.0 ACIS-S NONE 282.1270  73.3248 127.93  82.19  86.44 dss pspc rass
705227     30208    0                 NGC5728 2025:139:11:42:16.739  15.0 ACIS-S NONE 220.6021 -17.2306 243.00 165.01 116.33 dss pspc rass
201686     30630    0             zeta Puppis 2025:139:16:31:10.517  20.0 ACIS-S HETG 120.8953 -39.9797 250.50  84.70 105.28 dss pspc rass
705227     30939    0                 NGC5728 2025:139:22:42:57.537  12.6 ACIS-S NONE 220.6004 -17.2297 247.00 164.57 103.28 dss pspc rass
 ----      42407               CAL-ER (PER01) 2025:140:02:49:19.561   3.0   --    --  134.0000  17.0000 253.88  72.61  92.07   
 ----      42406               CAL-ER (PER02) 2025:140:04:17:17.981   0.9   --    --  230.2864 -18.6918 257.54 173.67 101.13   
 ----      42405               CAL-ER (PER03) 2025:140:05:25:19.677   0.9   --    --  249.0000 -18.7601  97.96 168.53 165.80   
 ----      42404               CAL-ER (PER04) 2025:140:06:14:58.172   3.0   --    --  333.1110  -5.5729 110.51  86.13  83.06   
 ----      42403               CAL-ER (PER05) 2025:140:09:00:00.000   3.0   --    --  250.0000 -26.3223  64.69 166.51  83.00   
 ----      42402               CAL-ER (PER09) 2025:140:11:30:00.000   0.9   --    --  344.0000  10.0000 107.84  70.86 100.30   
402510     28769    0                  GX 9+9 2025:140:12:28:00.337  10.0 ACIS-S HETG 262.9486 -16.9832 101.06 155.40  84.51 dss pspc rass
201844 CCT 30929    0    2RXS J000539.7-07540 2025:140:15:51:45.795  20.0 ACIS-S NONE   1.4326  -7.9235 110.00  61.66  97.16 dss pspc rass
402510     30934    0                  GX 9+9 2025:140:22:02:11.641  10.0 ACIS-S HETG 262.9491 -16.9838 101.26 155.78  97.19 dss pspc rass
 ----      42401               CAL-ER (IAT02) 2025:141:01:16:34.221   0.0   --    --  337.0000 -48.0000 110.27  98.85  75.19   
 ----      42400               CAL-ER (IAT01) 2025:141:01:43:44.166   0.9   --    --   40.2904 -30.3516 159.39  53.16  50.92   
601632     30142    0                 NGC1097 2025:141:02:27:10.330  10.0 ACIS-S NONE  41.5828 -30.2655 164.00  52.71   4.12 dss pspc rass
 ----      42399               CAL-ER (CAL01) 2025:141:05:36:28.587   0.0   --    --  337.0000 -48.0000 110.16  99.00  52.37   
402510     30935    0                  GX 9+9 2025:141:06:09:03.927  10.0 ACIS-S HETG 262.9495 -16.9841 101.46 156.10  75.33 dss pspc rass
 ----      42398               CAL-ER (CAL01) 2025:141:09:23:28.805   0.0   --    --  337.0000 -48.0000 110.06  99.12  75.37   
 ----      42397               CAL-ER (CAL01) 2025:141:09:50:38.518   0.9   --    --   40.2904 -30.3516 159.03  53.33  50.90   
601632     30937    0                 NGC1097 2025:141:10:34:04.682  10.0 ACIS-S NONE  41.5835 -30.2654 164.00  52.88   4.46 dss pspc rass
 ----      42396               CAL-ER (CAL01) 2025:141:13:43:23.416   0.0   --    --  337.0000 -48.0000 109.96  99.27  52.41   
402510     30936    0                  GX 9+9 2025:141:14:16:01.167  10.0 ACIS-S HETG 262.9499 -16.9845 101.68 156.42  75.51 dss pspc rass
 ----      42395               CAL-ER (CAL01) 2025:141:17:30:28.449   0.0   --    --  337.0000 -48.0000 109.87  99.39  75.55   
 ----      42394               CAL-ER (CAL01) 2025:141:17:57:37.937   0.9   --    --   40.2904 -30.3516 158.68  53.50  50.89   
601632     30938    0                 NGC1097 2025:141:18:41:04.101  10.0 ACIS-S NONE  41.5841 -30.2653 164.00  53.04   4.80 dss pspc rass
 ----      42393               CAL-ER (IAT03) 2025:141:21:58:08.021   0.9   --    --  115.8759 -32.6965 234.00  76.12  67.04   
201573     26966    2                  XI BOO 2025:141:22:55:52.527   5.0  HRC-I NONE 222.8617  19.1195 210.00 137.68 119.51 dss pspc rass
601660     30728    0                 NGC4781 2025:142:00:47:16.114  11.3 ACIS-S NONE 193.5894 -10.5331 251.70 135.55  56.52 dss pspc rass
601653     30171    0                 NGC4540 2025:142:04:17:46.200  30.0 ACIS-S NONE 188.7034  15.5569 235.47 119.04  31.14 dss pspc rass
601595     28534    0               Sextans A 2025:142:13:02:41.239  17.1 ACIS-S NONE 152.7430  -4.6902 249.88  94.91  42.30 dss pspc rass
 ----      42392               CAL-ER (CAL01) 2025:142:18:09:36.508   3.0   --    --  134.0000  17.0000 253.86  70.07  28.58   
 ----      42391               CAL-ER (CAL01) 2025:142:19:37:34.845   0.9   --    --  230.2864 -18.6919 256.89 171.13 101.13   
 ----      42390               CAL-ER (CAL01) 2025:142:20:44:27.733   0.9   --    --  249.0000 -18.7601 102.54 170.94 160.64   
 ----      42389               CAL-ER (CAL01) 2025:142:21:33:34.012   3.0   --    --  330.1110  -5.5729 110.45  91.46  80.65   
 ----      42388               CAL-ER (CAL01) 2025:143:00:20:00.000   3.0   --    --  250.0000 -26.3223  60.63 168.90  81.54   
 ----      42387               CAL-ER (CAL01) 2025:143:01:48:00.178   0.9   --    --  344.0000  10.0000 108.58  73.26 101.26   
601595     28530    0               Sextans A 2025:143:03:15:35.646  24.0 ACIS-S NONE 152.7431  -4.6920 249.73  94.39 178.73 dss pspc rass
402508     28767    0              4U 1626-67 2025:143:10:38:00.646  11.0  HRC-I HETG 248.0345 -67.4714  10.13 132.82  96.87 dss pspc rass
705227     30940    0                 NGC5728 2025:143:14:18:26.211  10.5 ACIS-S NONE 220.5933 -17.2320 265.00 161.09  97.17 dss pspc rass
402581 TOO 30047    3            EXO 0748-676 2025:143:17:49:38.140  15.0 ACIS-S NONE 117.1578 -67.7308 232.13  97.54  93.14 dss pspc rass
601595     30931    0               Sextans A 2025:143:22:30:13.068  10.0 ACIS-S NONE 152.7432  -4.6930 249.56  93.63  67.87 dss pspc rass
705227     30941    0                 NGC5728 2025:144:01:47:22.745  12.0 ACIS-S NONE 220.5934 -17.2321 265.00 160.62  67.48 dss pspc rass
402508     30932    0              4U 1626-67 2025:144:05:49:47.745  12.0  HRC-I HETG 248.0335 -67.4713   9.09 133.02  96.33 dss pspc rass
590762     29586    2              E0102-72.3 2025:144:09:33:20.457  19.0 ACIS-S NONE  15.9304 -71.9992 137.99  97.64  36.52 dss pspc rass
201845 CCT 30930    0    2RXS J160108.0-32545 2025:144:15:21:43.748  10.0 ACIS-S NONE 240.2570 -32.9188 349.99 167.82  73.00 dss pspc rass
705368 CCT 30928    0    2MASS J08182026-1425 2025:144:18:48:29.093  10.0 ACIS-S NONE 124.5902 -14.4092 235.00  71.26 110.65 dss pspc rass
402508     30933    0              4U 1626-67 2025:144:22:17:34.093  10.0  HRC-I HETG 248.0316 -67.4714   8.20 133.20  91.48 dss pspc rass
601648     30165    0                 NGC4207 2025:145:01:44:34.195  28.3 ACIS-S NONE 183.8680   9.5841 250.00 115.46 111.76 dss pspc rass
 ----      42386               CAL-ER (CAL01) 2025:145:10:03:49.485   0.9   --    --  230.2865 -18.6919 256.54 168.63  53.86   
 ----      42385               CAL-ER (CAL01) 2025:145:11:14:11.006   2.0   --    --  252.9935 -21.6265  88.24 169.90 176.29   
 ----      42384               CAL-ER (CAL01) 2025:145:12:19:54.304   3.0   --    --  330.1110  -5.5729 110.72  93.96  76.00   
 ----      42383               CAL-ER (PER10) 2025:145:15:25:00.000   3.0   --    --  130.0000   2.0000 248.17  68.47 169.46   
601660     30942    0                 NGC4781 2025:145:18:56:15.773  11.9 ACIS-S NONE 193.5900 -10.5386 250.00 132.00  64.58 dss pspc rass
590782     29606    1           SNR G21.5-0.9 2025:145:23:06:26.753   9.4  HRC-S NONE 278.4026 -10.5800 111.00 144.15 163.57 dss pspc rass


MAY1225A


Seq #  NB  ObsID Constr.          Target                Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew   Overlays
------ --- ----- ------- -------------------- --------------------- ----- ------ ---- -------- -------- ------ ------ ------ -------------
704971     28581    0                NGC 4102 2025:131:21:58:41.440  13.0 ACIS-S NONE 181.6105  52.7334 227.99  98.40 123.92 dss pspc rass
 ----      42422               CAL-ER (PER01) 2025:132:02:08:45.168   3.0   --    --  229.0000 -13.0000 178.54 174.94  81.82   
 ----      42421               CAL-ER (PER03) 2025:132:03:47:45.786   3.5   --    --  226.2750 -22.2077 328.40 175.18 150.80   
 ----      42420               CAL-ER (PER02) 2025:132:05:25:28.116   3.0   --    --   88.0000 -39.0000 219.00  67.76 107.42   
 ----      42419               CAL-ER (CAL01) 2025:132:12:30:00.000   0.9   --    --  219.5760 -22.6780 294.69 169.88 105.19   
705227     30209    0                 NGC5728 2025:132:13:37:36.784  12.5 ACIS-S NONE 220.5936 -17.2291 262.18 171.65  33.31 dss pspc rass
 ----      42418               CAL-ER (IAT01) 2025:132:17:33:41.166   0.0   --    --  198.3639 -53.4944 313.64 137.31  75.33   
590764     29588    2              E0102-72.3 2025:132:18:02:12.107  30.0 ACIS-I NONE  15.9222 -71.9887 148.27  93.01  57.00 dss pspc rass
 ----      42417               CAL-ER (CAL01) 2025:133:02:45:54.110   0.0   --    --  198.3639 -53.4944 313.10 137.21  57.15   
705227     30923    0                 NGC5728 2025:133:03:18:28.457  15.0 ACIS-S NONE 220.5935 -17.2283 261.73 171.09  75.25 dss pspc rass
802201     30371    0               Abell 795 2025:133:08:03:16.595  34.7 ACIS-S NONE 141.0135  14.1773 237.00  86.44  86.86 dss pspc rass
402566 TOO 29784    2              4U 1630-47 2025:133:18:27:47.101  15.0 ACIS-S HETG 248.4817 -47.4113  25.98 147.53 138.04 dss pspc rass
300558     30098    0                  VV Pup 2025:133:23:17:02.118  30.0 ACIS-S HETG 123.7823 -19.0311 240.00  80.93 106.88 dss pspc rass
402566 TOO 30922    2              4U 1630-47 2025:134:08:16:41.998  15.0 ACIS-S HETG 248.4857 -47.4111  30.98 147.87 108.74 dss pspc rass
705304     30452    1            HE 1353-1917 2025:134:13:09:06.998  11.8  HRC-I NONE 209.1441 -19.5129 270.00 159.07 104.58 dss pspc rass
601605     30870    0                 NGC4248 2025:134:17:01:07.733   7.2 ACIS-I NONE 184.4611  47.4268 224.99 101.60  85.71 dss pspc rass
 ----      42416               CAL-ER (CAL01) 2025:134:19:33:04.190   3.0   --    --  229.0000 -13.0000 202.74 173.77  72.53   
 ----      42415               CAL-ER (CAL01) 2025:134:21:02:50.752   3.0   --    --  228.8683 -21.0817 311.74 176.53 109.24   
 ----      42414               CAL-ER (CAL01) 2025:134:22:32:52.720   3.0   --    --   88.0000 -39.0000 217.55  67.04 110.40   
705120     28795    0    [ZCA2021] BOSS1244 S 2025:135:04:49:44.588  40.0 ACIS-I NONE 190.8721  35.9180 222.41 112.90 120.62 dss pspc rass
705304     30927    1            HE 1353-1917 2025:135:16:38:49.588  13.0  HRC-I NONE 209.1442 -19.5132 270.00 158.05  75.52 dss pspc rass
802201     30373    0               Abell 795 2025:135:20:47:55.120  20.0 ACIS-S NONE 141.0129  14.1719 251.93  84.01  76.16 dss pspc rass
705227     30211    0                 NGC5728 2025:136:02:55:34.009  15.5 ACIS-S NONE 220.5952 -17.2305 259.45 168.24  84.67 dss pspc rass
601602     30752    0                 UGC7242 2025:136:07:52:42.793  10.0 ACIS-I NONE 183.5506  66.0964 215.99  87.15 104.91 dss pspc rass
802201     30720    0               Abell 795 2025:136:11:08:03.291  12.0 ACIS-S NONE 141.0128  14.1731 251.92  83.42  59.29 dss pspc rass
705227     30924    0                 NGC5728 2025:136:15:02:21.997  14.8 ACIS-S NONE 220.5950 -17.2293 259.13 167.75  84.65 dss pspc rass
901877 P1  29903    0         IGR J17303-2750 2025:136:20:01:12.319   5.0 ACIS-I NONE 262.6005 -27.8566  82.00 152.06 166.90 dss pspc rass
201666     28742    1                  G29-38 2025:136:22:06:57.319  14.5  HRC-I NONE 352.2137   5.2338 109.05  61.32  92.17 dss pspc rass
802154     28797    0                   A1550 2025:137:02:52:39.233  15.0 ACIS-I NONE 187.2310  47.6420 222.01 101.15 128.39 dss pspc rass
705227     30925    0                 NGC5728 2025:137:07:36:48.768  12.0 ACIS-S NONE 220.5949 -17.2278 258.67 167.08  83.89 dss pspc rass
 ----      42413               CAL-ER (CAL01) 2025:137:11:21:37.636   3.0   --    --  229.0000 -13.0000 217.34 171.94  44.43   
 ----      42412               CAL-ER (CAL01) 2025:137:12:52:33.605   3.0   --    --  119.0890  34.7396 267.04  58.78 114.45   
 ----      42411               CAL-ER (PER06) 2025:137:14:33:51.815   3.0   --    --  335.0000  -7.0000 110.73  82.33 161.12   
 ----      42410               CAL-ER (CAL01) 2025:137:17:05:00.000   3.1   --    --  335.0000  -7.0000 110.74  82.41   0.01   
 ----      42409               CAL-ER (CAL01) 2025:137:18:04:30.000   2.8   --    --  335.1949  -7.0871 110.78  82.30   0.21   
 ----      42408               CAL-ER (PER08) 2025:137:19:18:29.708   0.0   --    --  270.0592  28.6429 140.23 120.91  73.48   
705300 P1  30012    0              GAMA593724 2025:137:19:53:42.118  17.0 ACIS-S NONE 217.5703  -0.1492 219.74 154.57  84.97 dss pspc rass
503504     28776    0                NGC 4449 2025:138:01:19:27.118  12.0  HRC-I NONE 187.0581  44.1134 219.99 102.95  53.27 dss pspc rass
802201     30734    0               Abell 795 2025:138:05:07:00.000  16.1 ACIS-S NONE 141.0126  14.1747 251.88  81.75  49.75 dss pspc rass
705227     30926    0                 NGC5728 2025:138:10:09:38.280  16.5 ACIS-S NONE 220.5952 -17.2284 258.27 166.05  84.62 dss pspc rass
705120     28848    0    [ZCA2021] BOSS1244 S 2025:138:15:15:50.838  31.5 ACIS-I NONE 190.8722  35.9185 224.74 110.38  70.69 dss pspc rass


Previous weeks' short-term schedules.

Last modified: 05/16/25



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