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.

JAN2323A


Seq #  NB  ObsID Constr.          Target                Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew   Overlays
------ --- ----- ------- -------------------- --------------------- ----- ------ ---- -------- -------- ------ ------ ------ -------------
704497     27521    0                UGC 9959 2023:023:11:22:41.841  25.0 ACIS-S NONE 234.7799  43.8397  62.58  90.22  74.14 dss pspc rass
790382     27178    2                  MKN421 2023:023:18:46:09.233  30.8 ACIS-S LETG 166.1425  38.1656 106.30 140.22  50.80 dss pspc rass
704529     25548    1    SDSS J122855.90+3414 2023:024:03:47:27.833   3.3 ACIS-S NONE 187.2439  34.2215  88.57 124.10  18.18 dss pspc rass
503360     27089    1                GW170817 2023:024:05:11:49.331  32.0 ACIS-S NONE 197.4497 -23.4045  64.67  98.20  62.36 dss pspc rass
790382     27179    2                  MKN421 2023:024:14:37:44.605  30.0 ACIS-S LETG 166.1410  38.1682 107.32 140.74  76.90 dss pspc rass
 ----      44862               CAL-ER (PER01) 2023:024:23:19:23.140   2.0   --    --  138.7620  24.0156 111.01 167.80  29.24   
 ----      44861               CAL-ER (PER02) 2023:025:00:32:21.259   3.0   --    --  260.1598  19.1990  52.66  59.67 108.61   
 ----      44860               CAL-ER (PER03) 2023:025:03:00:00.000   1.0   --    --  134.0000  51.0000 167.34 147.64  96.39   
 ----      44859               CAL-ER (PER04) 2023:025:03:36:00.000   1.5   --    --  134.0000  51.0000 167.39 147.63   0.05   
 ----      44858               CAL-ER (PER05) 2023:025:04:09:30.000   0.9   --    --  134.0000  51.0000 167.44 147.62   0.05   
 ----      44857               CAL-ER (PER13) 2023:025:04:53:30.771   1.9   --    --  278.6210  68.4210  26.65  89.91  57.73   
 ----      44856               CAL-ER (PER06) 2023:025:06:00:00.000   1.0   --    --  126.9424  23.5490 180.91 175.55  86.20   
 ----      44855               CAL-ER (PER10) 2023:025:07:03:41.036   1.0   --    --  129.0000  16.8000  38.45 177.06 141.83   
201611 DDT 27638    1         Gaia J1350-5914 2023:025:09:41:09.167  18.5 ACIS-S NONE 207.5761 -59.2644  75.51  78.45  98.78 dss pspc rass
704824     26903    1               4C +05.34 2023:025:15:27:16.521  19.5 ACIS-S NONE 121.9635   4.5439 336.00 164.56 100.30 dss pspc rass
503450 DDT 27646    2              SN 2022jli 2023:025:21:34:41.744  10.0 ACIS-S NONE   8.6766  -8.3631 278.00  59.91 121.14 dss pspc rass
 ----      44854               CAL-ER (IAT03) 2023:026:00:51:55.356   0.9   --    --   10.4560  54.8720 302.88  90.86  67.77   
790382     27180    2                  MKN421 2023:026:01:43:31.144  26.0 ACIS-S LETG 166.1525  38.1693 115.98 141.67  91.86 dss pspc rass
201612 P1  27674    0    2RXS J130517.4-50511 2023:026:09:36:35.435  20.0 ACIS-S NONE 196.3107 -50.8833  55.49  88.40 109.07 dss pspc rass
704415     25371    0    [MOK2016b] HSC J0844 2023:026:15:43:06.548  15.0 ACIS-S NONE 131.2134   2.4350 359.20 163.42  79.58 dss pspc rass
704323     25936    0              Abell 2744 2023:026:20:36:49.978  13.0 ACIS-I NONE   3.5789 -30.3815 264.50  50.77 127.01 dss pspc rass
704415     27675    0    [MOK2016b] HSC J0844 2023:027:00:57:10.500  13.3 ACIS-S NONE 131.2123   2.4351 358.00 163.58 126.79 dss pspc rass
704323     27678    0              Abell 2744 2023:027:05:22:29.855  12.5 ACIS-I NONE   3.5781 -30.3801 264.99  50.49 126.70 dss pspc rass
704435     25891    0    DELS J091054.53-0414 2023:027:09:34:25.412  17.0 ACIS-I NONE 137.7203  -4.2474   8.00 155.68 126.42 dss pspc rass
 ----      44853               CAL-ER (PER11) 2023:027:14:46:10.170   3.0   --    --  185.0000 -43.0000  52.57 100.12  61.24   
 ----      44852               CAL-ER (CAL01) 2023:027:17:00:00.000   1.0   --    --  260.0000  19.0000  55.28  61.42  93.87   
 ----      44851               CAL-ER (PER12) 2023:027:18:40:00.000   1.0   --    --  122.3660  46.0178 194.70 151.80 107.42   
 ----      44850               CAL-ER (CAL01) 2023:027:19:05:00.000   1.5   --    --  122.3660  46.0178 194.73 151.79   0.03   
 ----      44849               CAL-ER (CAL01) 2023:027:19:38:30.000   0.9   --    --  122.3660  46.0178 194.79 151.78   0.05   
 ----      44848               CAL-ER (PER14) 2023:027:20:15:00.000   0.9   --    --  129.0000  26.0000 185.10 172.41  21.47   
 ----      44847               CAL-ER (PER15) 2023:027:21:08:52.010   0.9   --    --  125.0000  17.0000 288.31 175.25 102.08   
 ----      44846               CAL-ER (CAL01) 2023:027:22:06:23.307   2.8   --    --   11.6430 -30.8440 272.87  56.88 118.52   
 ----      44845               CAL-ER (CAL01) 2023:027:23:34:53.902   0.9   --    --  125.0000  17.0000 287.74 175.15 118.54   
704323     27679    0              Abell 2744 2023:028:01:16:25.342  12.0 ACIS-I NONE   3.5768 -30.3790 266.49  49.83 125.35 dss pspc rass
704653     27144    0    2MASS J08194059+0823 2023:028:05:19:15.391  15.0 ACIS-I NONE 124.8949   8.3958 333.54 168.81 123.00 dss pspc rass
704323     25939    0              Abell 2744 2023:028:10:12:09.112  14.6 ACIS-I NONE   3.5771 -30.3772 264.49  49.52 123.28 dss pspc rass
704653     27682    0    2MASS J08194059+0823 2023:028:14:58:21.815  13.0 ACIS-I NONE 124.8932   8.3961 333.00 168.69 123.20 dss pspc rass
704323     27680    0              Abell 2744 2023:028:19:17:53.610  13.3 ACIS-I NONE   3.5763 -30.3760 264.99  49.22 123.13 dss pspc rass
704435     27677    0    DELS J091054.53-0414 2023:028:23:42:58.888  13.0 ACIS-I NONE 137.7155  -4.2485   2.00 156.58 125.65 dss pspc rass
704323     27681    0              Abell 2744 2023:029:04:03:04.171  10.0 ACIS-I NONE   3.5762 -30.3756 264.99  48.94 125.65 dss pspc rass
704435     25882    0    DELS J091054.53-0414 2023:029:07:33:09.455  18.0 ACIS-I NONE 137.7155  -4.2485   2.00 156.75 125.65 dss pspc rass
704621 P1  26700    0              ESO 103-35 2023:029:13:12:03.196  10.1 ACIS-S NONE 279.6586 -65.4396 136.07  51.87 105.28 dss pspc rass
601545     25782    0                ngc 4631 2023:029:16:42:20.380  31.0 ACIS-S NONE 190.5496  32.5545  83.99 125.46 119.04 dss pspc rass
704435     27676    0    DELS J091054.53-0414 2023:030:01:56:22.200  10.0 ACIS-I NONE 137.7217  -4.2491  18.00 157.16  98.39 dss pspc rass
 ----      44844               CAL-ER (PER16) 2023:030:05:21:56.150   3.0   --    --  157.0000  30.0000 112.62 154.33 104.62   


JAN1623A


Seq #  NB  ObsID Constr.          Target                Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew   Overlays
------ --- ----- ------- -------------------- --------------------- ----- ------ ---- -------- -------- ------ ------ ------ -------------
704705     26784    0         SDSS J0921+2854 2023:016:04:37:34.752  19.5 ACIS-S NONE 140.3352  28.8963 116.99 157.86 101.13 dss pspc rass
704643     27129    0    CFHQS J142952+544717 2023:016:10:31:28.783  30.0 ACIS-S NONE 217.4685  54.7637  69.89 101.64  60.30 dss pspc rass
802046     27203    0                 IC 2431 2023:016:19:26:46.492  15.7 ACIS-S NONE 136.1481  14.5714  70.00 161.65  89.08 dss pspc rass
 ----      44883               CAL-ER (CTI01) 2023:017:00:29:27.793   1.0   --    --  244.7000 -25.0000  83.23  49.20 112.68   
 ----      44882               CAL-ER (PER08) 2023:017:01:30:00.000   1.0   --    --  288.0000  27.0000  12.84  48.94  93.31   
 ----      44881               CAL-ER (PER02) 2023:017:02:30:00.000   3.0   --    --  140.7000  69.0000 152.41 129.99  81.08   
 ----      44880               CAL-ER (CAL01) 2023:017:05:13:00.000   1.0   --    --  140.7000  69.0000 152.56 129.97   0.16   
 ----      44879               CAL-ER (CAL01) 2023:017:05:55:00.000   1.0   --    --  140.7000  69.0000 152.61 129.97   0.05   
 ----      44878               CAL-ER (PER09) 2023:017:07:15:00.000   1.0   --    --   86.0000  16.0000 283.94 148.74 104.76   
 ----      44877               CAL-ER (PER01) 2023:017:08:15:00.000   3.0   --    --  113.0000  20.0000 279.93 174.63  26.34   
503448 DDT 27644    2              SN 2022jli 2023:017:11:05:15.779  10.0 ACIS-S NONE   8.6731  -8.3671 289.16  68.30 106.37 dss pspc rass
503339 TOO 25216    2                SN2012ap 2023:017:14:22:09.488  13.9 ACIS-S NONE  75.0373  -3.3338 301.27 130.68  66.28 dss pspc rass
402412     26554    0       LMC Deep Field 06 2023:017:18:43:46.945  20.0 ACIS-I NONE  83.1577 -67.0322 319.45  88.20  65.06 dss pspc rass
704435     25871    0    DELS J091054.53-0414 2023:018:00:50:30.555  27.4 ACIS-I NONE 137.7287  -4.2456  35.07 149.22  80.52 dss pspc rass
503360     27088    1                GW170817 2023:018:08:56:20.725  28.0 ACIS-S NONE 197.4486 -23.4043  62.00  92.46  61.51 dss pspc rass
802046     27673    0                 IC 2431 2023:018:17:14:31.379  16.0 ACIS-S NONE 136.1481  14.5712  70.00 163.59  72.05 dss pspc rass
503382     27094    0          SNR G310.6-1.6 2023:018:22:19:00.850  13.8 ACIS-S NONE 210.2017 -63.4529  80.01  71.75 100.46 dss pspc rass
704902     27660    0    SDSSJ080554.11+11143 2023:019:02:46:52.825  10.0 ACIS-S NONE 121.4525  11.2309   5.27 170.67 100.65 dss pspc rass
503382     27672    0          SNR G310.6-1.6 2023:019:06:11:20.002  14.0 ACIS-S NONE 210.1994 -63.4542  77.01  71.97 100.29 dss pspc rass
704325     25281    0    SDSS J101747.09+3932 2023:019:10:47:03.988  19.0 ACIS-S NONE 154.4694  39.5191 113.68 145.53 121.05 dss pspc rass
 ----      44876               CAL-ER (CTI02) 2023:019:16:40:06.259   1.0   --    --  260.0000   9.0000  53.62  50.00  96.01   
 ----      44875               CAL-ER (PER06) 2023:019:17:45:00.000   1.0   --    --  257.0000 -60.0000 121.99  50.40  95.06   
 ----      44874               CAL-ER (CAL01) 2023:019:18:45:00.000   3.0   --    --  138.9000 -18.5000  24.89 137.46  87.05   
 ----      44873               CAL-ER (CAL01) 2023:019:20:38:00.000   1.0   --    --  138.9000 -18.5000  24.80 137.52   0.09   
 ----      44872               CAL-ER (CAL01) 2023:019:21:20:00.000   1.0   --    --  138.9000 -18.5000  24.76 137.55   0.04   
 ----      44871               CAL-ER (PER03) 2023:019:22:30:00.000   3.0   --    --  208.0000  12.0000  70.70  97.29  83.82   
 ----      44870               CAL-ER (PER07) 2023:020:01:00:00.000   1.0   --    --  150.0000  14.0000  72.96 152.12  57.56   
 ----      44869               CAL-ER (PER04) 2023:020:02:00:00.000   1.0   --    --  116.0000  -4.0000 347.48 155.10  94.87   
402412     27669    0       LMC Deep Field 06 2023:020:02:56:19.590  17.0 ACIS-I NONE  83.1576 -67.0322 319.45  88.13  67.15 dss pspc rass
802105     27665    0    RMJ081107.4+164304.6 2023:020:08:15:48.165  10.0 ACIS-I NONE 122.7913  16.7100  13.81 176.36  92.89 dss pspc rass
201560     26498    0                NGC 6204 2023:020:11:46:46.805  14.0 ACIS-I NONE 251.5613 -47.0393 105.02  48.70 129.65 dss pspc rass
802104     27664    0    RMJ082400.3+153446.7 2023:020:16:23:28.283  10.0 ACIS-I NONE 126.0134  15.5749  37.46 174.15 125.36 dss pspc rass
201560     27668    0                NGC 6204 2023:020:19:53:29.772  14.0 ACIS-I NONE 251.5634 -47.0411 105.02  48.98 125.36 dss pspc rass
704520     25539    1    SDSS J082508.75+1155 2023:021:00:29:38.877   3.3 ACIS-S NONE 126.2674  11.9069  22.86 171.06 122.93 dss pspc rass
704905     27663    0             HS0749+1943 2023:021:02:04:13.204  10.0 ACIS-S NONE 118.0587  19.6213 277.16 175.66 108.32 dss pspc rass
704419     25714    0          QSO J0041-4936 2023:021:05:33:02.468  14.0 ACIS-I NONE  10.3105 -49.6122 267.95  60.38 119.94 dss pspc rass
704903     27661    0    SDSSJ075515.06+18585 2023:021:10:08:15.944  15.0 ACIS-S NONE 118.7922  19.0077 285.18 175.91 118.76 dss pspc rass
704419     27667    0          QSO J0041-4936 2023:021:15:00:09.422  14.0 ACIS-I NONE  10.3095 -49.6107 267.95  60.18 118.76 dss pspc rass
802106     27666    0    RMJ074323.1+173341.9 2023:021:19:34:34.350  10.0 ACIS-I NONE 115.8335  17.5561 289.58 172.45 115.12 dss pspc rass
503449 DDT 27645    2              SN 2022jli 2023:021:23:00:55.843  10.0 ACIS-S NONE   8.6643  -8.3655 298.00  63.83 108.86 dss pspc rass
790382     27014    2                  MKN421 2023:022:02:36:38.848  13.8 ACIS-S LETG 166.1588  38.1666 116.97 139.07 150.98 dss pspc rass
 ----      44868               CAL-ER (CTI04) 2023:022:06:50:39.700   2.0   --    --  126.0000  24.0000 154.50 175.38  40.05   
 ----      44867               CAL-ER (CTI03) 2023:022:08:30:00.000   3.0   --    --  260.0000   9.0000  56.01  51.98 126.39   
 ----      44866               CAL-ER (CAL01) 2023:022:11:00:00.000   1.0   --    --  122.0000  58.7000 183.09 141.03 104.76   
 ----      44865               CAL-ER (CAL01) 2023:022:12:05:00.000   1.0   --    --  122.0000  58.7000 183.16 141.01   0.07   
 ----      44864               CAL-ER (CAL01) 2023:022:12:50:00.000   1.0   --    --  122.0000  58.7000 183.22 141.00   0.06   
 ----      44863               CAL-ER (PER05) 2023:022:13:50:00.000   3.0   --    --  294.0000  68.0000   9.61  88.05  53.22   
790382     27671    2                  MKN421 2023:022:17:34:22.365  14.5 ACIS-S LETG 166.1562  38.1681 116.97 139.50  67.76 dss pspc rass
704904     27662    0    SDSSJ144509.42+15292 2023:022:22:04:48.224  22.0 ACIS-S NONE 221.2862  15.4610  62.00  89.08  59.69 dss pspc rass
704705     27670    0         SDSS J0921+2854 2023:023:04:44:03.261  22.0 ACIS-S NONE 140.3382  28.8943 116.99 163.16  76.88 dss pspc rass


Previous weeks' short-term schedules.

Last modified: 01/20/23



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