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.

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

MAY1826A

Seq # NB ObsID Constr. Target Start Time SI Grat Active Chips RA Dec Roll Pitch Slew Overlays ------ --- ----- ------- -------------------- --------------------- ----- ------ ---- ----------------- -------- -------- ------ ------ ------ ------------- ---- 41480 CAL-ER (PER01) 2026:137:10:39:03.758 3.0 -- -- 245.0000 -21.7000 78.97 169.32 110.21 ---- 41479 CAL-ER (PER02) 2026:137:14:00:00.000 3.0 -- -- 4.3700 -14.7450 123.49 59.56 110.70 ---- 41478 CAL-ER (CAL01) 2026:137:17:00:00.000 3.2 -- -- 245.0000 -21.7000 78.97 169.54 110.70 ---- 41477 CAL-ER (CAL01) 2026:137:18:33:32.604 0.9 -- -- 5.0000 -14.4000 127.00 59.01 111.20 802203 30394 0 ZwCl 0857.9+2107 2026:137:20:00:35.519 15.0 ACIS-S NONE S1,S2,S3 135.1535 20.8945 248.00 75.07 162.42 dss pspc rass 705227 30191 0 NGC5728 2026:138:00:46:43.255 14.0 ACIS-S NONE S2,S3 220.5995 -17.2531 258.49 166.68 92.83 dss pspc rass 802203 32355 0 ZwCl 0857.9+2107 2026:138:05:16:03.022 15.0 ACIS-S NONE S1,S2,S3 135.1535 20.8945 254.66 74.70 92.23 dss pspc rass 705227 32352 0 NGC5728 2026:138:10:02:02.691 12.0 ACIS-S NONE S2,S3 220.5995 -17.2531 258.38 166.30 92.23 dss pspc rass 802203 31883 0 ZwCl 0857.9+2107 2026:138:13:58:02.334 10.0 ACIS-S NONE S1,S2,S3 135.1535 20.8945 254.69 74.34 92.22 dss pspc rass 705227 32353 0 NGC5728 2026:138:17:20:41.879 12.0 ACIS-S NONE S2,S3 220.5995 -17.2531 258.26 166.00 92.22 dss pspc rass 705311 30247 0 Center of COSMOS-Web 2026:138:21:12:11.420 29.6 ACIS-I NONE I0,I1,I2,I3 150.2920 2.1718 250.21 93.94 71.97 dss pspc rass 705227 30206 0 NGC5728 2026:139:05:56:45.071 14.0 ACIS-S NONE S2,S3 220.5995 -17.2531 258.03 165.49 71.97 dss pspc rass 601689 29879 0 SDSS J155636.40+4152 2026:139:10:26:47.814 48.0 ACIS-S NONE I2,S1,S2,S3 239.1517 41.8807 176.49 118.34 95.46 dss pspc rass ---- 41476 CAL-ER (PER03) 2026:140:00:16:52.167 3.0 -- -- 239.0000 -15.9000 148.76 175.36 63.60 ---- 41475 CAL-ER (PER05) 2026:140:01:50:27.903 3.0 -- -- 232.6930 -20.1030 273.12 176.41 126.43 ---- 41474 CAL-ER (PER04) 2026:140:03:15:33.436 3.0 -- -- 148.1000 7.6000 250.09 88.86 88.17 ---- 41473 CAL-ER (CAL01) 2026:140:08:30:00.000 3.0 -- -- 232.6930 -20.1030 271.98 176.18 88.05 ---- 41472 CAL-ER (CAL01) 2026:140:10:02:23.661 0.9 -- -- 239.0000 -15.9000 153.04 175.47 121.02 201810 30086 0 TV Cassiopeia 2026:140:12:55:29.041 21.0 ACIS-S HETG S0,S1,S2,S3,S4,S5 4.8281 59.1390 66.65 53.91 121.62 dss pspc rass 590807 31395 1 SNR G21.5-0.9 2026:140:19:27:54.041 10.0 HRC-I NONE 278.3896 -10.5685 105.00 139.29 97.80 dss pspc rass 590784 31372 2 E0102-72.3 2026:140:22:49:46.570 25.0 ACIS-I NONE I3 16.0100 -72.0320 151.07 96.17 88.69 dss pspc rass 705227 32354 0 NGC5728 2026:141:06:28:52.361 14.6 ACIS-S NONE S2,S3 220.5995 -17.2531 269.00 163.56 121.18 dss pspc rass 590785 31373 2 E0102-72.3 2026:141:11:14:37.863 15.0 ACIS-S NONE S2,S3 16.0100 -72.0320 151.12 96.38 121.16 dss pspc rass 590789 31377 2 E0102-72.3 2026:141:15:39:52.863 35.0 ACIS-I NONE I3 16.0100 -72.0320 140.55 96.45 10.27 dss pspc rass 300579 CCT 32349 0 MASTER J1449-3244 2026:142:01:57:31.731 16.5 ACIS-S NONE S2,S3,S4 222.3625 -32.7352 306.85 160.93 84.67 dss pspc rass 705328 30511 0 BOSS1348 2026:142:07:10:45.538 31.7 ACIS-I NONE I0,I1,I2,I3 207.0600 23.9800 217.51 126.02 102.29 dss pspc rass ---- 41471 CAL-ER (PER06) 2026:142:16:24:43.221 3.0 -- -- 235.9750 -16.1700 214.76 174.83 49.10 ---- 41470 CAL-ER (PER08) 2026:142:17:57:08.409 3.0 -- -- 236.4500 -26.1500 335.83 173.74 121.14 ---- 41469 CAL-ER (PER07) 2026:142:19:27:41.571 3.0 -- -- 81.5600 -36.8380 204.01 61.02 112.74 ---- 41468 CAL-ER (CAL01) 2026:142:23:40:00.000 3.0 -- -- 236.3810 -25.2280 329.21 174.48 113.75 ---- 41467 CAL-ER (CAL01) 2026:143:01:17:41.830 0.9 -- -- 239.0000 -15.9000 185.37 175.42 144.89 201810 32351 0 TV Cassiopeia 2026:143:03:13:18.743 10.0 ACIS-S HETG S0,S1,S2,S3,S4,S5 4.8281 59.1390 66.00 54.69 124.54 dss pspc rass 601721 TOO 31222 1 TDE2023mfm 2026:143:06:31:53.829 50.0 ACIS-S NONE I3,S2,S3,S4 324.3665 -4.3453 110.16 96.48 73.88 dss pspc rass ---- 41466 CAL-ER (IAT02) 2026:143:20:59:18.317 0.9 -- -- 46.8380 -70.0800 167.41 91.17 83.59 201917 CCT 32350 0 2RXS J155154.5-26220 2026:143:21:50:21.769 20.0 ACIS-S NONE S2,S3 237.9766 -26.3682 324.99 173.83 89.43 dss pspc rass 705429 P1 31282 0 SDSS J094314.26+1023 2026:144:04:04:16.694 20.0 ACIS-S NONE S1,S2,S3,S4 145.8094 10.3968 240.00 81.91 112.87 dss pspc rass 601649 30166 0 NGC4293 2026:144:10:02:53.694 30.0 ACIS-S NONE I3,S2,S3,S4 185.3040 18.3830 240.00 112.99 40.25 dss pspc rass 705540 CCT 32348 0 2MASX J16125120-0521 2026:144:18:57:00.871 10.5 ACIS-S NONE S1,S2,S3,S4 243.2134 -5.3548 173.03 164.46 83.79 dss pspc rass

MAY1126A

Seq # NB ObsID Constr. Target Start Time SI Grat Active Chips RA Dec Roll Pitch Slew Overlays ------ --- ----- ------- -------------------- --------------------- ----- ------ ---- ----------------- -------- -------- ------ ------ ------ ------------- 705311 30059 0 Center of COSMOS-Web 2026:130:21:30:37.439 41.0 ACIS-I NONE I0,I1,I2,I3 150.2920 2.1718 245.00 101.55 74.00 dss pspc rass 705227 29939 0 NGC5728 2026:131:09:25:32.321 14.5 ACIS-S NONE S2,S3 220.5995 -17.2531 264.30 172.98 72.37 dss pspc rass 705312 30060 0 Center of COSMOS-Web 2026:131:13:58:43.468 41.1 ACIS-I NONE I0,I1,I2,I3 150.1667 2.2174 251.36 100.75 72.09 dss pspc rass ---- 41498 CAL-ER (PER02) 2026:132:01:55:59.579 3.0 -- -- 223.3999 -18.7782 278.15 175.01 76.08 ---- 41497 CAL-ER (PER11) 2026:132:03:32:01.241 3.0 -- -- 233.9000 -21.1000 58.94 174.18 137.37 ---- 41496 CAL-ER (PER12) 2026:132:07:00:00.000 3.0 -- -- 343.9100 -14.2781 113.00 71.66 102.92 ---- 41495 CAL-ER (PER14) 2026:132:08:07:17.245 3.0 -- -- 358.6626 -9.4358 119.08 56.64 15.52 ---- 41494 CAL-ER (PER13) 2026:132:12:10:00.000 2.0 -- -- 107.3000 29.1000 265.00 54.04 176.71 705227 32339 0 NGC5728 2026:132:13:41:26.546 14.0 ACIS-S NONE S2,S3 220.5995 -17.2531 262.49 171.90 119.04 dss pspc rass ---- 41493 CAL-ER (IAT01) 2026:132:18:05:01.916 0.0 -- -- 202.7570 45.9108 207.10 111.61 86.65 201810 30091 0 TV Cassiopeia 2026:132:18:37:19.812 17.5 ACIS-S HETG S1,S2,S3,S4 4.8281 59.1390 53.01 52.01 74.02 dss pspc rass ---- 41492 CAL-ER (CAL01) 2026:132:23:56:26.591 0.0 -- -- 202.7570 45.9108 207.32 111.48 74.01 705227 30195 0 NGC5728 2026:133:00:31:27.902 14.5 ACIS-S NONE S2,S3 220.5995 -17.2531 262.10 171.46 86.27 dss pspc rass ---- 41491 CAL-ER (CAL01) 2026:133:05:03:16.655 0.0 -- -- 202.7570 45.9108 207.51 111.36 86.16 201810 32341 0 TV Cassiopeia 2026:133:05:35:34.368 14.8 ACIS-S HETG S0,S1,S2,S3,S4,S5 4.8281 59.1390 53.01 52.11 74.00 dss pspc rass ---- 41490 CAL-ER (IAT02) 2026:133:10:03:52.797 0.0 -- -- 162.0410 70.2590 243.28 79.94 51.63 901870 32210 0 Cloverleaf ORC 2026:133:10:35:37.832 15.2 ACIS-I NONE I0,I1,I2,I3 174.3500 -0.8480 235.00 122.76 71.55 dss pspc rass 705317 30258 0 Center of COSMOS-Web 2026:133:15:10:34.837 30.0 ACIS-I NONE I0,I1,I2,I3 149.9958 2.1376 251.07 98.67 29.11 dss pspc rass 705227 32343 0 NGC5728 2026:134:00:02:09.502 14.0 ACIS-S NONE S2,S3 220.5995 -17.2531 267.00 170.50 72.35 dss pspc rass 503623 TOO 31145 3 SN2026hkg 2026:134:04:31:15.192 15.0 ACIS-S NONE S1,S2,S3,S4 135.9005 -67.9704 258.49 105.33 91.18 dss pspc rass 705318 30066 0 Center of COSMOS-Web 2026:134:09:12:52.412 29.9 ACIS-I NONE I0,I1,I2,I3 149.8705 2.1832 250.93 97.81 72.54 dss pspc rass ---- 41489 CAL-ER (PER04) 2026:134:18:03:01.567 2.0 -- -- 222.4145 -15.5951 258.91 171.04 73.86 ---- 41488 CAL-ER (PER10) 2026:134:21:45:00.000 3.0 -- -- 241.8992 -22.4014 71.38 169.47 166.27 ---- 41487 CAL-ER (CAL01) 2026:135:00:30:00.000 3.0 -- -- 349.7009 -13.3251 116.49 68.77 100.79 705273 31993 0 MCG-5-23-16 2026:135:04:37:51.326 16.0 ACIS-S HETG S3 146.9172 -30.9489 256.24 103.89 131.11 dss pspc rass ---- 41486 CAL-ER (IAT03) 2026:135:09:25:36.610 0.0 -- -- 188.9188 -13.2966 256.57 138.49 45.28 802272 CCT 32338 0 MOOJ1514-1259 2026:135:09:56:43.470 12.0 ACIS-I NONE I0,I1,I2,I3 228.5950 -12.9897 207.97 173.38 68.69 dss pspc rass 503703 DDT 32251 0 J0952+50 2026:135:13:53:14.175 20.0 ACIS-S NONE S2,S3 147.8100 50.1250 253.45 79.25 94.55 dss pspc rass ---- 41485 CAL-ER (IAT04) 2026:135:19:44:33.186 0.0 -- -- 199.2918 50.1852 212.23 105.06 32.34 901871 30435 0 PG 1553+113 2026:135:20:13:24.491 16.0 ACIS-I NONE I0,I1,I2,I3,S2,S3 238.9292 11.1901 159.99 149.23 58.52 dss pspc rass ---- 41484 CAL-ER (IAT05) 2026:136:00:48:34.491 0.9 -- -- 238.9292 11.1901 160.00 149.22 0.03 300559 30100 0 AN UMa 2026:136:01:37:47.849 30.0 ACIS-S HETG S0,S1,S2,S3,S4,S5 166.1069 45.0539 244.00 92.16 81.18 dss pspc rass 901871 32344 0 PG 1553+113 2026:136:10:30:30.410 14.0 ACIS-I NONE I0,I1,I2,I3,S2 238.9292 11.1901 160.00 149.21 81.19 dss pspc rass ---- 41483 CAL-ER (CAL01) 2026:136:14:32:20.410 0.9 -- -- 238.9292 11.1901 160.00 149.20 0.02 201810 32342 0 TV Cassiopeia 2026:136:15:25:10.016 10.0 ACIS-S HETG S0,S1,S2,S3,S4,S5 4.8281 59.1390 57.01 52.89 97.40 dss pspc rass ---- 41482 CAL-ER (IAT06) 2026:136:18:33:20.931 0.0 -- -- 248.4332 64.7795 165.59 95.30 47.24 802272 CCT 32345 0 MOOJ1514-1259 2026:136:19:08:28.634 12.0 ACIS-I NONE I0,I1,I2,I3 228.5950 -12.9897 215.59 172.38 86.75 dss pspc rass 705318 32340 0 Center of COSMOS-Web 2026:136:23:03:45.173 11.0 ACIS-I NONE I0,I1,I2,I3 149.8705 2.1832 250.52 95.36 88.99 dss pspc rass 802272 CCT 32346 0 MOOJ1514-1259 2026:137:02:42:14.441 11.0 ACIS-I NONE I0,I1,I2,I3 228.5950 -12.9897 216.94 172.14 88.45 dss pspc rass 503705 DDT 32337 1 AT2026fgk 2026:137:06:20:52.448 10.1 ACIS-S NONE S2,S3 219.3171 71.8417 193.51 88.38 89.10 dss pspc rass ---- 41481 CAL-ER (PER09) 2026:137:09:43:23.336 0.9 -- -- 233.4000 -14.4640 185.03 175.16 86.84

Last modified: 05/15/26

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 © 1998-2026. All rights reserved.