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.

JAN1821A


Seq #     ObsID Constr.    Target              Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew
----------------------------------------------------------------------------------------------------------------------------
 ----     46642       CAL-ER (PER03) 2021:017:07:06:32.374   1.0   --    --  133.0000  18.4000  77.54 166.74  54.18   
 ----     46641       CAL-ER (PER01) 2021:017:07:56:20.632   3.0   --    --  210.0000  -5.0000  69.40  87.47  79.37   
 ----     46640       CAL-ER (PER04) 2021:017:11:10:00.000   1.0   --    --   36.0000  -9.0000 291.51  92.97 164.79   
 ----     46639       CAL-ER (PER02) 2021:017:12:00:09.625   3.0   --    --  112.9573  19.6637 280.82 173.88  80.97   
 ----     46638       CAL-ER (CTI01) 2021:017:14:29:22.965   3.0   --    --  133.0000  12.0000  54.41 164.41 139.82   
402191    24767 1    IGR J16318-4848 2021:017:16:35:50.721  30.0 ACIS-S HETG 247.9749 -48.8346 105.62  49.60 115.57 dss pspc rass
704211    24304 0    RX J0911.4+0551 2021:018:01:35:15.274  28.5 ACIS-S NONE 137.8577   5.8247  47.86 157.21 107.59 dss pspc rass
503277    23870 2           GW170817 2021:018:10:00:18.270  39.0 ACIS-S NONE 197.4511 -23.4052  66.06  93.01  65.47 dss pspc rass
201408    23860 1           HD 82443 2021:018:21:23:01.596  15.0 ACIS-S NONE 143.1900  27.0017  97.00 158.57  77.50 dss pspc rass
 ----     46637       CAL-ER (IAT01) 2021:019:02:13:07.440   0.9   --    --  120.0000   6.0000 356.00 165.54 110.69   
503195    24633 0             DEM S5 2021:019:03:07:06.349  29.0 ACIS-S NONE  10.1928 -73.5965 245.00  64.59 102.59 dss pspc rass
801921    24314 0          Abell 644 2021:019:11:46:12.417  29.6 ACIS-I NONE 124.3710  -7.5204   5.78 152.01  91.21 dss pspc rass
 ----     46636       CAL-ER (CTI02) 2021:019:20:18:01.368   3.0   --    --  120.0000   8.0000 351.86 167.64  21.29   
 ----     46635       CAL-ER (PER06) 2021:019:21:37:26.764   1.0   --    --  133.0000  12.0000  50.94 166.56  62.65   
 ----     46634       CAL-ER (PER05) 2021:019:22:26:08.916   3.0   --    --  194.0000 -35.0000  63.32  92.22  74.41   
 ----     46633       CAL-ER (PER07) 2021:020:00:30:00.000   1.0   --    --  140.0000 -38.0000  19.40 119.43  44.04   
 ----     46632       CAL-ER (PER08) 2021:020:03:00:00.000   3.0   --    --  133.0000  12.0000  50.53 166.79  59.60   
 ----     46631       CAL-ER (PER09) 2021:020:04:30:38.304   1.0   --    --  243.0000 -37.0000  90.99  53.79 113.12   
 ----     46630       CAL-ER (CTI03) 2021:020:06:08:32.737   3.0   --    --  243.0000 -37.0000  90.96  53.86   0.04   
503272    23597 1          RCW 86 NW 2021:020:07:28:59.737  17.0 ACIS-I NONE 220.4527 -62.2533  75.01  68.54  28.89 dss pspc rass
704163    23751 0 SDSS J082649.30+1639 2021:020:12:51:58.573  20.0 ACIS-S NONE 126.6979  16.6420  45.00 174.82 108.66 dss pspc rass
503272    24330 1          RCW 86 NW 2021:020:19:04:57.418  28.0 ACIS-I NONE 220.4532 -62.2545  75.01  68.85 108.66 dss pspc rass
704163    24930 0 SDSS J082649.30+1639 2021:021:03:31:16.256   6.0 ACIS-S NONE 126.6975  16.6410  45.00 175.33 108.66 dss pspc rass
503272    24931 1          RCW 86 NW 2021:021:05:50:55.092  23.5 ACIS-I NONE 220.4531 -62.2543  75.01  69.14 108.66 dss pspc rass
601516    23615 0          PGC024068 2021:021:12:58:38.775  24.0 ACIS-S NONE 128.6162   1.6503  19.00 161.13  92.53 dss pspc rass
704286    24876 1        ESO253-G003 2021:021:20:11:38.385  29.0 ACIS-S NONE  81.2960 -45.9959 308.98 103.68  78.72 dss pspc rass
601515 P1 23614 0           UGC04467 2021:022:04:46:41.752  10.0 ACIS-S NONE 128.1777   0.2152  10.67 160.13  73.00 dss pspc rass
704248    24932 0 J100758.26+211529.2 2021:022:08:09:58.727   8.2 ACIS-S NONE 152.0054  21.2398  97.00 154.21  95.02 dss pspc rass
 ----     46629       CAL-ER (CTI04) 2021:022:11:11:25.485   3.0   --    --  120.0000   8.0000 339.45 167.52 128.36   
 ----     46628       CAL-ER (PER10) 2021:022:12:32:18.972   1.0   --    --  133.0000  12.0000  45.30 168.94  69.26   
 ----     46627       CAL-ER (PER11) 2021:022:13:21:01.127   3.0   --    --  194.0000 -35.0000  62.12  94.61  74.41   
 ----     46626       CAL-ER (PER12) 2021:022:16:30:00.000   1.0   --    --    2.2000  25.1000 303.20  71.43 176.71   
 ----     46625       CAL-ER (PER13) 2021:022:17:25:07.385   1.0   --    --  120.6000  23.3000 227.88 174.52 103.30   
 ----     46624       CAL-ER (PER14) 2021:022:18:30:00.000   3.0   --    --  332.9099  30.5793 328.18  56.88 118.40   
 ----     46623       CAL-ER (CTI05) 2021:022:21:31:41.612   3.0   --    --  253.4000  -6.6000  70.28  51.78 111.70   
704248    24499 0 J100758.26+211529.2 2021:022:23:26:08.429  21.0 ACIS-S NONE 152.0057  21.2393  97.00 154.83 103.23 dss pspc rass
901425    23014 0        JWST-DTDF-1 2021:023:05:50:47.966  26.5 ACIS-I NONE 260.6885  65.8043  45.01  91.71  86.22 dss pspc rass
601494 P1 22517 0            J092055 2021:023:13:39:48.679  21.0 ACIS-S NONE 140.2638  52.5691 155.78 144.99  53.30 dss pspc rass
402199    23421 3         V404 Cygni 2021:023:20:05:54.776  22.0 ACIS-S NONE 305.9923  33.8604 353.51  53.22  92.71 dss pspc rass
 ----     46622       CAL-ER (IAT02) 2021:024:02:53:53.690   0.9   --    --  127.4000  30.0000 174.82 169.25 116.17   
704164    23752 0 SDSS J085451.11+1730 2021:024:03:47:00.503  21.5 ACIS-S NONE 133.7168  17.4813  74.30 172.84  98.69 dss pspc rass
 ----     46621       CAL-ER (CAL01) 2021:024:10:23:07.866   0.9   --    --  127.4000  30.0000 176.46 169.20 100.30   
601495    24621 0          H1821+643 2021:024:11:12:41.763  25.0  HRC-S LETG 275.4637  64.3256  29.40  86.95  82.72 dss pspc rass
402262    23484 1        NGC 4485/90 2021:024:18:39:12.363  30.0 ACIS-S NONE 187.6565  41.6847  94.42 124.35  53.38 dss pspc rass
 ----     46620       CAL-ER (CTI06) 2021:025:03:27:20.339   3.0   --    --  130.0000  25.0000 157.77 173.55  57.47   


JAN1121A


Seq #     ObsID Constr.    Target              Start        Time   SI   Grat    RA       Dec    Roll   Pitch   Slew
----------------------------------------------------------------------------------------------------------------------------
201355 P1 23323 1 2MASS J15345704-1418 2021:010:13:34:46.601  10.0 ACIS-S NONE 233.7349 -14.3360  72.98  55.49  95.68 dss pspc rass
704067    23655 0          3CR 399.1 2021:010:16:57:25.740  14.0 ACIS-S NONE 288.9647  30.3244 359.01  52.35  92.19 dss pspc rass
601483 P1 22506 0 J092429.9+514301.2 2021:010:21:26:58.828  21.5 ACIS-S NONE 141.1556  51.7091 132.17 142.77  93.23 dss pspc rass
704067    24926 0          3CR 399.1 2021:011:04:01:31.916  14.0 ACIS-S NONE 288.9644  30.3243 359.01  52.31  93.23 dss pspc rass
 ----     46659       CAL-ER (IAT02) 2021:011:08:20:14.461   0.9   --    --  254.2769  19.7099  44.12  56.02  44.33   
601503    24476 0         2MFGC 6625 2021:011:09:16:05.250  17.0 ACIS-S NONE 125.9982  28.0931 116.99 166.49 110.98 dss pspc rass
503289    24910 1         GRB201214B 2021:011:14:29:29.939  25.3 ACIS-S NONE 187.9940   9.0769  69.88 107.22  65.60 dss pspc rass
 ----     46658       CAL-ER (CTI01) 2021:011:21:58:43.869   4.0   --    --  130.0000  21.0000  84.32 164.48  57.00   
 ----     46657       CAL-ER (PER01) 2021:011:23:14:00.563   6.0   --    --  129.0000  21.0000  84.39 165.46   0.98   
 ----     46656       CAL-ER (PER02) 2021:012:01:34:58.873   6.0   --    --  241.0000 -12.0000  71.71  50.96 114.62   
 ----     46655       CAL-ER (CAL01) 2021:012:03:55:57.168   1.0   --    --  129.0000  21.0000  84.58 165.68 114.62   
 ----     46654       CAL-ER (PER05) 2021:012:05:06:27.173   3.0   --    --  104.9880  22.4604 265.94 171.89 172.50   
 ----     46653       CAL-ER (CTI02) 2021:012:07:49:03.877   3.0   --    --  348.2536  -7.7636 291.14  54.16 117.62   
704182 P1 23770 0 SDSS J232326.17-0100 2021:012:09:20:29.877  15.0 ACIS-S NONE 350.8409  -0.9944 294.79  59.12   8.02 dss pspc rass
990025    24902 0 Cold ECS Blank Sky 2021:012:14:06:15.642  32.0  HRC-S NONE 269.9693  66.5450  22.34  90.01  91.18 dss pspc rass
704051 P1 23326 0 2MASS J07424841+2704 2021:012:23:33:30.441  12.0 ACIS-S NONE 115.7248  27.0753 168.50 174.38  84.36 dss pspc rass
601503    24927 0         2MFGC 6625 2021:013:03:19:35.895  12.3 ACIS-S NONE 125.9986  28.0928 116.99 167.84  47.59 dss pspc rass
402239    23461 1            M82 X-2 2021:013:07:13:09.368   5.0  HRC-I NONE 149.0185  69.6754 138.70 127.69  58.76 dss pspc rass
601449    22939 0          H1821+643 2021:013:09:01:06.413  37.0  HRC-S LETG 275.4583  64.3285  19.03  87.16  41.00 dss pspc rass
601527 P1 23626 0            NGC3104 2021:013:19:48:38.823  10.0 ACIS-I NONE 151.0069  40.7510 111.86 144.29  69.18 dss pspc rass
601503    23602 0         2MFGC 6625 2021:013:22:56:34.823  18.0 ACIS-S NONE 125.9978  28.0934 116.99 168.41  25.76 dss pspc rass
 ----     46652       CAL-ER (IAT01) 2021:014:04:37:47.728   0.9   --    --  256.6307  15.1946  47.42  53.04 115.72   
503245 P1 23570 0          SN 2009gj 2021:014:05:46:10.092  12.0 ACIS-S NONE   7.6039 -33.1975 279.30  63.67 167.35 dss pspc rass
503231 P1 23556 0           SN 2013F 2021:014:09:23:27.325   9.7 ACIS-S NONE 352.1773 -41.3116 264.87  50.98  15.52 dss pspc rass
 ----     46651       CAL-ER (CTI04) 2021:014:12:47:59.037   4.0   --    --  109.0000  16.0000 308.92 171.40 120.52   
 ----     46650       CAL-ER (CTI03) 2021:014:14:42:19.539   6.5   --    --  130.0000  21.0000  86.38 167.19 144.79   
 ----     46649       CAL-ER (CAL01) 2021:014:17:11:25.391   6.0   --    --  241.0000 -12.0000  72.36  53.61 113.69   
 ----     46648       CAL-ER (PER06) 2021:014:19:32:25.973   1.0   --    --  128.7688  20.2704  83.19 168.49 114.79   
 ----     46647       CAL-ER (CAL01) 2021:014:20:43:11.019   3.0   --    --  104.9880  22.4604 265.47 169.19 173.63   
 ----     46646       CAL-ER (CAL01) 2021:014:23:05:59.569   2.0   --    --  104.9880  22.4604 265.50 169.09   0.03   
704093    23681 1       MGJ0414+0534 2021:015:00:27:25.569  30.0 ACIS-S NONE  63.6389   5.5954 292.25 126.34  46.09 dss pspc rass
601449    24824 0          H1821+643 2021:015:09:28:01.803  39.0  HRC-S LETG 275.4581  64.3285  19.03  87.10 112.97 dss pspc rass
704233 P1 23821 0 2MASS J09503674+5128 2021:015:20:47:09.403  13.0 ACIS-S NONE 147.6832  51.4692 131.12 141.65  57.86 dss pspc rass
601503    24925 0         2MFGC 6625 2021:016:00:46:05.625  23.0 ACIS-S NONE 126.0004  28.0981 131.70 169.73  31.53 dss pspc rass
601495    22705 0          H1821+643 2021:016:07:45:01.803  41.0  HRC-S LETG 275.4646  64.3275  27.02  87.09  90.46 dss pspc rass
 ----     46645       CAL-ER (IAT04) 2021:016:19:41:10.642   0.9   --    --  120.2867  35.8852 174.05 164.92  77.91   
704237 P1 23825 0       GraL 0659+16 2021:016:20:37:03.609  15.0 ACIS-S NONE 104.7514  16.5000 290.45 166.12 111.15 dss pspc rass
601517 P1 23616 0           UGC04491 2021:017:01:25:23.825  10.1 ACIS-S NONE 128.9390   1.7049  26.47 158.52 102.77 dss pspc rass
 ----     46644       CAL-ER (CTI07) 2021:017:04:53:18.451   1.0   --    --  245.2638 -58.0893 110.47  53.62 105.05   
 ----     46643       CAL-ER (CTI08) 2021:017:05:51:34.783   1.0   --    --  123.3907  12.8591  26.97 171.09 117.48   


Previous weeks' short-term schedules.

Last modified: 01/15/21



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