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.

APR1221A


Seq #     ObsID Constr.    Target              Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew
----------------------------------------------------------------------------------------------------------------------------
 ----     46424       CAL-ER (PER04) 2021:101:22:33:41.411   8.0   --    --   78.8379  54.4386 291.56  65.10  95.36   
 ----     46423       CAL-ER (PER02) 2021:102:01:42:01.351   8.0   --    --  345.0000 -35.0000 135.57  54.96 177.75   
 ----     46422       CAL-ER (CTI01) 2021:102:05:35:14.173   1.0   --    --  270.0000 -50.0000  79.61 109.80  54.86   
703969    23042 0           NGC 5728 2021:102:06:32:32.168  26.0 ACIS-S NONE 220.6012 -17.2769  68.00 158.74  54.09 dss pspc rass
503226    23551 2          AT2020xnd 2021:102:14:26:21.144  17.0 ACIS-S NONE 335.0244  -2.8589 105.00  47.23 112.42 dss pspc rass
703969    25006 0           NGC 5728 2021:102:19:50:10.116  22.0 ACIS-S NONE 220.6013 -17.2780  68.00 159.29 112.42 dss pspc rass
503226    25008 2          AT2020xnd 2021:103:02:37:19.092  20.0 ACIS-S NONE 335.0251  -2.8598 105.00  47.73 112.42 dss pspc rass
990030    24988 0 Cold ECS Blank Sky 2021:103:08:45:45.226  34.0  HRC-S NONE 269.4863  66.8210 117.96  90.13  88.21 dss pspc rass
704241    24356 0             3c 297 2021:103:18:46:52.464  28.0 ACIS-S NONE 214.3698  -4.0265 120.00 166.71  86.79 dss pspc rass
704079    23667 2             Sgr A* 2021:104:03:06:56.964  25.9 ACIS-S NONE 266.4219 -29.0317  75.00 117.11  80.59 dss pspc rass
 ----     46421       CAL-ER (CTI02) 2021:104:10:48:06.988   1.0   --    --  208.5000 -10.1000  84.07 174.17  64.12   
 ----     46420       CAL-ER (PER12) 2021:104:11:48:52.856   3.0   --    --  200.0000 -12.0000 313.91 176.36 128.69   
 ----     46419       CAL-ER (PER05) 2021:104:13:22:04.206   8.0   --    --   62.0500 -25.3000 232.77  51.75 124.60   
 ----     46418       CAL-ER (PER06) 2021:104:16:18:35.581   3.0   --    --  200.0000 -12.0000 311.13 176.30 124.60   
 ----     46417       CAL-ER (CTI03) 2021:104:20:52:39.883   3.0   --    --  136.0000 -14.0000 265.66 114.45  68.19   
503280 P1 24707 0           SN 2014L 2021:104:22:37:31.502   5.0 ACIS-S NONE 184.7136  14.4350 220.00 149.81  70.92 dss pspc rass
704081    23669 3               M 87 2021:105:00:15:42.502  15.0 ACIS-S NONE 187.7163  12.4144 221.00 153.12   3.94 dss pspc rass
503163    24774 0     PSR J0821-4300 2021:105:05:05:28.015  27.1  HRC-S LETG 125.4685 -42.9880 282.99 105.45 109.16 dss pspc rass
704277 P1 24736 0         J1200-0341 2021:105:13:10:29.837  18.0 ACIS-S NONE 180.2395  -3.6646 253.97 155.94  80.39 dss pspc rass
 ----     46416       CAL-ER (IAT01) 2021:105:18:42:11.610   0.9   --    --  198.0000 -19.0000 327.11 169.27  72.88   
704278    24737 1           NGC 1365 2021:105:19:39:02.692  20.0 ACIS-S HETG  53.4156 -36.1195 216.95  53.77 115.51 dss pspc rass
704125 P1 23713 0      MCG+04.19.017 2021:106:01:48:07.844   2.0 ACIS-S NONE 119.9665  23.4133 258.51  91.28  91.14 dss pspc rass
704082    23670 2               M 87 2021:106:02:51:52.632  15.0 ACIS-S NONE 187.7172  12.4122 216.84 152.22  67.11 dss pspc rass
503292    25005 0        ASASSN-20hx 2021:106:07:35:21.291   2.0  HRC-I NONE 255.9417  62.0160 122.97  97.61  80.90 dss pspc rass
704080    23668 2             Sgr A* 2021:106:08:45:31.969  25.0 ACIS-S NONE 266.4263 -29.0295  85.35 119.29  96.05 dss pspc rass
703969    25007 0           NGC 5728 2021:106:16:07:23.096  16.5 ACIS-S NONE 220.6012 -17.2754  68.00 163.03  43.48 dss pspc rass
704218 P1 23806 0     WFI J2026-4536 2021:106:21:14:51.390  15.0 ACIS-S NONE 306.5646 -45.6245 105.51  89.35  76.37 dss pspc rass
 ----     46415       CAL-ER (CTI04) 2021:107:01:59:34.161  11.0   --    --  211.0000 -14.8000  53.38 172.71  83.57   
 ----     46414       CAL-ER (PER07) 2021:107:05:32:47.968   3.0   --    --  280.0000 -33.0000  90.71 108.35  64.79   
 ----     46413       CAL-ER (PER08) 2021:107:06:52:47.493   5.0   --    --  210.7000 -15.0000  50.30 173.01  65.21   
 ----     46412       CAL-ER (PER09) 2021:107:09:05:05.826   3.0   --    --  203.0000  -4.0000 199.45 173.09 150.63   
 ----     46411       CAL-ER (PER10) 2021:107:10:35:00.000   1.0   --    --  190.0000 -21.0000 302.94 161.88 107.80   
 ----     46410       CAL-ER (PER13) 2021:107:11:31:29.737   1.0   --    --   70.0000 -18.0000 240.49  52.43 109.48   
 ----     46409       CAL-ER (CTI05) 2021:107:12:25:47.449   0.9   --    --   54.4000 -35.0000 216.46  53.14  27.66   
704278    24794 1           NGC 1365 2021:107:13:15:09.296  38.0 ACIS-S HETG  53.4200 -36.1209 208.01  53.58   8.00 dss pspc rass
503163    22438 0     PSR J0821-4300 2021:108:00:17:11.622  25.0  HRC-S LETG 125.4694 -42.9889 282.99 104.21  59.42 dss pspc rass
402265    23487 1        NGC 4485/90 2021:108:07:56:09.660  30.0 ACIS-S NONE 187.6161  41.6633 207.02 124.80 120.60 dss pspc rass


APR0521A


Seq #     ObsID Constr.    Target              Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew
----------------------------------------------------------------------------------------------------------------------------
201317    22660 1             XI BOO 2021:094:22:56:17.911   5.0  HRC-I NONE 222.8698  19.0918 128.46 142.09  88.98 dss pspc rass
201449    24989 2             TW Hya 2021:095:01:13:02.976  30.0  HRC-S LETG 165.4414 -34.6973 310.87 140.99 170.63 dss pspc rass
503193    23019 0     1E 0102.2-7219 2021:095:10:04:27.279  25.0  HRC-I NONE  16.0703 -72.0235 175.06  78.12  71.57 dss pspc rass
201257    21580 1            PROCYON 2021:095:17:38:23.672   5.0  HRC-I NONE 114.8137   5.2369 262.80  99.49  97.98 dss pspc rass
801918    23850 0  Virgo Cluster S11 2021:095:19:34:40.809  20.0 ACIS-I NONE 187.5189   8.9641 219.00 163.19  78.54 dss pspc rass
704009    22625 0             3CR 86 2021:096:01:47:19.858  20.0 ACIS-S NONE  51.7956  55.3502 309.03  57.11 107.18 dss pspc rass
801918    25002 0  Virgo Cluster S11 2021:096:07:59:42.223  14.5 ACIS-I NONE 187.5244   8.9621 202.00 162.82 105.93 dss pspc rass
 ----     46439       CAL-ER (CTI01) 2021:096:12:14:40.354   5.0   --    --  190.9272   4.0166 202.64 168.59   6.08   
 ----     46438       CAL-ER (PER02) 2021:096:14:19:18.338   3.0   --    --   51.2875  49.6051 312.78  52.52 116.10   
 ----     46437       CAL-ER (PER01) 2021:096:15:49:28.973   2.0   --    --  323.0000  10.0000  90.57  51.96 111.05   
 ----     46436       CAL-ER (PER03) 2021:096:17:02:39.432   3.0   --    --  213.7093  -3.1124 101.60 161.52 109.53   
 ----     46435       CAL-ER (CTI02) 2021:096:22:34:25.675   1.0   --    --  323.6346   7.9236  92.29  51.66 110.17   
402202    24293 0  hete j1900.1-2455 2021:096:23:49:17.693  25.0 ACIS-S NONE 285.0502 -24.9415  95.78  93.49  50.79 dss pspc rass
503193    22702 0     1E 0102.2-7219 2021:097:07:16:16.542  25.0  HRC-I NONE  16.0690 -72.0236 175.06  78.84  66.66 dss pspc rass
 ----     46434       CAL-ER (IAT03) 2021:097:14:45:43.560   0.9   --    --  199.6125 -30.5785   7.97 156.15  77.78   
704241    23829 0             3c 297 2021:097:15:37:02.122  14.0 ACIS-S NONE 214.3627  -4.0310  99.00 161.90  90.57 dss pspc rass
503151    22423 1     HESS J1731-347 2021:097:20:00:09.912  34.0 ACIS-I NONE 263.0291 -34.7311  81.02 113.28  64.33 dss pspc rass
704241    25000 0             3c 297 2021:098:05:56:37.711  13.0 ACIS-S NONE 214.3622  -4.0303  99.00 162.40  64.33 dss pspc rass
 ----     46433       CAL-ER (IAT02) 2021:098:10:08:23.039   0.9   --    --  201.6195 -30.9798  11.01 155.86  88.15   
503193    24997 0     1E 0102.2-7219 2021:098:10:56:46.002  30.0  HRC-I NONE  16.0628 -72.0243 175.05  79.26  77.40 dss pspc rass
704118 P1 23706 0           PGC50427 2021:098:19:49:49.438   2.0 ACIS-S NONE 212.0162 -30.4158  33.58 153.22  79.01 dss pspc rass
704241    25001 0             3c 297 2021:098:20:54:04.297  21.9 ACIS-S NONE 214.3621  -4.0301  99.00 162.89  69.36 dss pspc rass
 ----     46432       CAL-ER (CTI03) 2021:099:03:16:49.758   4.0   --    --  208.3979  -3.0390 113.20 168.48  15.76   
 ----     46431       CAL-ER (CAL01) 2021:099:04:31:59.758   4.0   --    --  208.3979  -3.0390 113.39 168.51   0.19   
 ----     46430       CAL-ER (CAL01) 2021:099:05:47:09.758   4.0   --    --  208.3979  -3.0390 113.59 168.55   0.19   
 ----     46429       CAL-ER (PER04) 2021:099:07:34:41.249   1.0   --    --  322.1987  12.2180  90.75  54.96 114.11   
 ----     46428       CAL-ER (PER05) 2021:099:08:43:29.456   3.0   --    --   64.4897 -13.8476 247.94  50.95 164.87   
 ----     46427       CAL-ER (PER06) 2021:099:10:12:20.850   3.0   --    --  175.1269 -16.4246 288.77 156.00 105.10   
 ----     46426       CAL-ER (CTI05) 2021:099:14:05:41.865   0.9   --    --  187.2653   7.6329 215.59 161.22  78.20   
503229    23554 1            2020wnt 2021:099:15:01:50.010  25.0 ACIS-S NONE  56.6295  43.2415 304.02  48.91 112.29 dss pspc rass
801918    25003 0  Virgo Cluster S11 2021:099:22:38:44.867  20.9 ACIS-I NONE 187.5221   8.9658 213.46 159.98 111.36 dss pspc rass
704135 P1 23723 0         CGCG178-28 2021:100:04:56:46.307   4.3 ACIS-S NONE 121.7738  36.2581 255.88  95.67  66.48 dss pspc rass
704077    23665 3             Sgr A* 2021:100:07:01:52.054  25.0 ACIS-S NONE 266.4272 -29.0306  86.08 113.39 170.53 dss pspc rass
704241    24357 0             3c 297 2021:100:14:27:47.327  18.0 ACIS-S NONE 214.3638  -4.0326  99.00 164.32  61.90 dss pspc rass
704261 P1 24720 0 J210839.33+100413.7 2021:100:20:06:14.945   3.7 ACIS-S NONE 317.1757  10.0498  93.81  61.32 103.32 dss pspc rass
503229    24999 1            2020wnt 2021:100:21:50:19.382  25.0 ACIS-S NONE  56.6297  43.2414 304.02  47.85 121.08 dss pspc rass
704105 P1 23693 0           MARK1239 2021:101:05:22:57.916   2.0 ACIS-S NONE 148.0731  -1.5890 260.74 128.20  92.14 dss pspc rass
704078    23666 2             Sgr A* 2021:101:06:46:54.351  25.0 ACIS-S NONE 266.4268 -29.0298  85.97 114.34 156.48 dss pspc rass
704241    25004 0             3c 297 2021:101:14:12:50.277  17.4 ACIS-S NONE 214.3634  -4.0320  99.00 165.07  61.94 dss pspc rass
 ----     46425       CAL-ER (CTI04) 2021:101:19:45:52.623   3.0   --    --  187.2792   6.4166 220.98 160.30 123.44   


Previous weeks' short-term schedules.

Last modified: 04/09/21



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