OBSCAT data extracted 10/20/25

This page contains data for all observations except type=CAL observations (calibration).

For each proposal cycle (AO stands for Announcement of Opportunity), there's a table showing, for each instrumet/grating combination, the number of obsids, the percentage of total obsids, the exposure time for those observations, and the percentage of the total time. The first column shows the AO number.

A plot of percentages by proposal number, vs. AO

A plot of percentages by exposure time, vs. AO

ao si grating obsids pct_obs time pct_time
27 ACIS-I HETG 0 0 0 0
27 ACIS-I LETG 0 0 0 0
27 ACIS-I NONE 7 37 130 37
27 ACIS-S HETG 0 0 0 0
27 ACIS-S LETG 0 0 0 0
27 ACIS-S NONE 10 53 191 54
27 HRC-I HETG 0 0 0 0
27 HRC-I LETG 0 0 0 0
27 HRC-I NONE 0 0 0 0
27 HRC-S HETG 0 0 0 0
27 HRC-S LETG 2 11 30 8.55
27 HRC-S NONE 0 0 0 0
27 total
19 100 351 100

ao si grating obsids pct_obs time pct_time
26 ACIS-I HETG 0 0 0 0
26 ACIS-I LETG 0 0 0 0
26 ACIS-I NONE 133 26 1419 21
26 ACIS-S HETG 56 11 1054 15
26 ACIS-S LETG 0 0 0 0
26 ACIS-S NONE 246 49 3522 52
26 HRC-I HETG 5 0.99 70 1.03
26 HRC-I LETG 0 0 0 0
26 HRC-I NONE 46 9.11 515 7.55
26 HRC-S HETG 0 0 0 0
26 HRC-S LETG 15 2.97 184 2.70
26 HRC-S NONE 4 0.79 58 0.85
26 total
505 100 6823 100

ao si grating obsids pct_obs time pct_time
25 ACIS-I HETG 0 0 0 0
25 ACIS-I LETG 0 0 0 0
25 ACIS-I NONE 366 34 6475 38
25 ACIS-S HETG 53 4.97 1019 5.97
25 ACIS-S LETG 0 0 0 0
25 ACIS-S NONE 488 46 7841 46
25 HRC-I HETG 3 0.28 34 0.20
25 HRC-I LETG 0 0 0 0
25 HRC-I NONE 117 11 1219 7.14
25 HRC-S HETG 0 0 0 0
25 HRC-S LETG 19 1.78 237 1.39
25 HRC-S NONE 20 1.88 250 1.46
25 total
1066 100 17074 100

ao si grating obsids pct_obs time pct_time
24 ACIS-I HETG 0 0 0 0
24 ACIS-I LETG 0 0 0 0
24 ACIS-I NONE 423 39 7378 40
24 ACIS-S HETG 79 7.21 1731 9.35
24 ACIS-S LETG 0 0 0 0
24 ACIS-S NONE 537 49 8909 48
24 HRC-I HETG 0 0 0 0
24 HRC-I LETG 0 0 0 0
24 HRC-I NONE 38 3.47 341 1.84
24 HRC-S HETG 0 0 0 0
24 HRC-S LETG 0 0 0 0
24 HRC-S NONE 19 1.73 145 0.78
24 total
1096 100 18503 100

ao si grating obsids pct_obs time pct_time
23 ACIS-I HETG 0 0 0 0
23 ACIS-I LETG 0 0 0 0
23 ACIS-I NONE 349 30 6340 33
23 ACIS-S HETG 87 7.49 1912 9.84
23 ACIS-S LETG 1 0.09 30 0.15
23 ACIS-S NONE 646 56 10166 52
23 HRC-I HETG 0 0 0 0
23 HRC-I LETG 0 0 0 0
23 HRC-I NONE 61 5.25 734 3.78
23 HRC-S HETG 0 0 0 0
23 HRC-S LETG 12 1.03 177 0.91
23 HRC-S NONE 5 0.43 67 0.34
23 total
1161 100 19427 100

ao si grating obsids pct_obs time pct_time
22 ACIS-I HETG 0 0 0 0
22 ACIS-I LETG 0 0 0 0
22 ACIS-I NONE 675 43 8267 31
22 ACIS-S HETG 140 8.94 3299 13
22 ACIS-S LETG 0 0 0 0
22 ACIS-S NONE 642 41 12593 48
22 HRC-I HETG 0 0 0 0
22 HRC-I LETG 1 0.06 30 0.11
22 HRC-I NONE 51 3.26 954 3.63
22 HRC-S HETG 0 0 0 0
22 HRC-S LETG 48 3.07 972 3.70
22 HRC-S NONE 9 0.57 186 0.71
22 total
1566 100 26301 100

ao si grating obsids pct_obs time pct_time
21 ACIS-I HETG 0 0 0 0
21 ACIS-I LETG 0 0 0 0
21 ACIS-I NONE 172 22 4753 24
21 ACIS-S HETG 136 18 3918 20
21 ACIS-S LETG 0 0 0 0
21 ACIS-S NONE 332 43 8113 41
21 HRC-I HETG 0 0 0 0
21 HRC-I LETG 2 0.26 73.5 0.37
21 HRC-I NONE 45 5.87 815 4.12
21 HRC-S HETG 0 0 0 0
21 HRC-S LETG 79 10 2093 11
21 HRC-S NONE 0 0 0 0
21 total
766 100 19766 100

ao si grating obsids pct_obs time pct_time
20 ACIS-I HETG 0 0 0 0
20 ACIS-I LETG 0 0 0 0
20 ACIS-I NONE 375 26 6896 25
20 ACIS-S HETG 89 6.15 2493 9.05
20 ACIS-S LETG 0 0 0 0
20 ACIS-S NONE 930 64 16519 60
20 HRC-I HETG 0 0 0 0
20 HRC-I LETG 0 0 0 0
20 HRC-I NONE 19 1.31 232 0.84
20 HRC-S HETG 0 0 0 0
20 HRC-S LETG 27 1.87 1287 4.67
20 HRC-S NONE 7 0.48 135 0.49
20 total
1447 100 27562 100

ao si grating obsids pct_obs time pct_time
19 ACIS-I HETG 0 0 0 0
19 ACIS-I LETG 0 0 0 0
19 ACIS-I NONE 280 33 7488 37
19 ACIS-S HETG 108 13 3536 17
19 ACIS-S LETG 0 0 0 0
19 ACIS-S NONE 436 51 8647 42
19 HRC-I HETG 3 0.35 117 0.57
19 HRC-I LETG 0 0 0 0
19 HRC-I NONE 9 1.06 255 1.24
19 HRC-S HETG 0 0 0 0
19 HRC-S LETG 8 0.94 400 1.95
19 HRC-S NONE 5 0.59 51 0.25
19 total
849 100 20493 100

ao si grating obsids pct_obs time pct_time
18 ACIS-I HETG 0 0 0 0
18 ACIS-I LETG 0 0 0 0
18 ACIS-I NONE 221 26 5849 28
18 ACIS-S HETG 60 6.94 1990 9.62
18 ACIS-S LETG 0 0 0 0
18 ACIS-S NONE 535 62 11465 55
18 HRC-I HETG 0 0 0 0
18 HRC-I LETG 0 0 0 0
18 HRC-I NONE 15 1.74 329 1.59
18 HRC-S HETG 0 0 0 0
18 HRC-S LETG 31 3.59 1020 4.93
18 HRC-S NONE 2 0.23 31 0.15
18 total
864 100 20685 100

ao si grating obsids pct_obs time pct_time
17 ACIS-I HETG 0 0 0 0
17 ACIS-I LETG 0 0 0 0
17 ACIS-I NONE 276 35 7140 36
17 ACIS-S HETG 87 11 3608 18
17 ACIS-S LETG 0 0 0 0
17 ACIS-S NONE 378 48 8269 41
17 HRC-I HETG 0 0 0 0
17 HRC-I LETG 0 0 0 0
17 HRC-I NONE 23 2.95 603 3.00
17 HRC-S HETG 0 0 0 0
17 HRC-S LETG 15 1.92 460 2.29
17 HRC-S NONE 1 0.13 15 0.07
17 total
780 100 20095 100

ao si grating obsids pct_obs time pct_time
16 ACIS-I HETG 0 0 0 0
16 ACIS-I LETG 0 0 0 0
16 ACIS-I NONE 385 48 12169 49
16 ACIS-S HETG 62 7.69 3277 13
16 ACIS-S LETG 2 0.25 100 0.40
16 ACIS-S NONE 340 42 8839 36
16 HRC-I HETG 0 0 0 0
16 HRC-I LETG 0 0 0 0
16 HRC-I NONE 8 0.99 100 0.40
16 HRC-S HETG 0 0 0 0
16 HRC-S LETG 5 0.62 250 1.01
16 HRC-S NONE 4 0.50 43.8 0.18
16 total
806 100 24779 100

ao si grating obsids pct_obs time pct_time
15 ACIS-I HETG 0 0 0 0
15 ACIS-I LETG 0 0 0 0
15 ACIS-I NONE 256 37 9713 42
15 ACIS-S HETG 56 8.15 3274 14
15 ACIS-S LETG 15 2.18 669 2.86
15 ACIS-S NONE 327 48 8669 37
15 HRC-I HETG 0 0 0 0
15 HRC-I LETG 1 0.15 5 0.02
15 HRC-I NONE 14 2.04 309 1.32
15 HRC-S HETG 0 0 0 0
15 HRC-S LETG 16 2.33 720 3.08
15 HRC-S NONE 2 0.29 11 0.05
15 total
687 100 23370 100

ao si grating obsids pct_obs time pct_time
14 ACIS-I HETG 0 0 0 0
14 ACIS-I LETG 0 0 0 0
14 ACIS-I NONE 403 45 12759 47
14 ACIS-S HETG 44 4.90 3075 11
14 ACIS-S LETG 2 0.22 90 0.33
14 ACIS-S NONE 406 45 10177 38
14 HRC-I HETG 0 0 0 0
14 HRC-I LETG 0 0 0 0
14 HRC-I NONE 32 3.56 372 1.38
14 HRC-S HETG 0 0 0 0
14 HRC-S LETG 7 0.78 447 1.65
14 HRC-S NONE 4 0.45 108 0.40
14 total
898 100 27028 100

ao si grating obsids pct_obs time pct_time
13 ACIS-I HETG 0 0 0 0
13 ACIS-I LETG 0 0 0 0
13 ACIS-I NONE 365 40 11674 40
13 ACIS-S HETG 80 8.79 5586 19
13 ACIS-S LETG 1 0.11 100 0.35
13 ACIS-S NONE 435 48 10526 36
13 HRC-I HETG 1 0.11 1 0
13 HRC-I LETG 0 0 0 0
13 HRC-I NONE 20 2.20 455 1.58
13 HRC-S HETG 0 0 0 0
13 HRC-S LETG 7 0.77 478 1.66
13 HRC-S NONE 1 0.11 25 0.09
13 total
910 100 28845 100

ao si grating obsids pct_obs time pct_time
12 ACIS-I HETG 0 0 0 0
12 ACIS-I LETG 0 0 0 0
12 ACIS-I NONE 251 30 6148 26
12 ACIS-S HETG 58 6.89 2959 13
12 ACIS-S LETG 10 1.19 800 3.44
12 ACIS-S NONE 481 57 11937 51
12 HRC-I HETG 0 0 0 0
12 HRC-I LETG 0 0 0 0
12 HRC-I NONE 28 3.33 384 1.65
12 HRC-S HETG 0 0 0 0
12 HRC-S LETG 12 1.43 994 4.28
12 HRC-S NONE 2 0.24 2 0.01
12 total
842 100 23223 100

ao si grating obsids pct_obs time pct_time
11 ACIS-I HETG 0 0 0 0
11 ACIS-I LETG 0 0 0 0
11 ACIS-I NONE 232 28 6664 34
11 ACIS-S HETG 49 5.84 1819 9.27
11 ACIS-S LETG 4 0.48 115 0.59
11 ACIS-S NONE 517 62 9897 50
11 HRC-I HETG 0 0 0 0
11 HRC-I LETG 0 0 0 0
11 HRC-I NONE 16 1.91 288 1.46
11 HRC-S HETG 0 0 0 0
11 HRC-S LETG 19 2.26 845 4.30
11 HRC-S NONE 2 0.24 2 0.01
11 total
839 100 19629 100

ao si grating obsids pct_obs time pct_time
10 ACIS-I HETG 0 0 0 0
10 ACIS-I LETG 0 0 0 0
10 ACIS-I NONE 229 31 5168 27
10 ACIS-S HETG 86 12 3411 18
10 ACIS-S LETG 5 0.67 317 1.68
10 ACIS-S NONE 391 52 8506 45
10 HRC-I HETG 0 0 0 0
10 HRC-I LETG 0 0 0 0
10 HRC-I NONE 14 1.88 151 0.80
10 HRC-S HETG 0 0 0 0
10 HRC-S LETG 16 2.14 770 4.09
10 HRC-S NONE 5 0.67 500 2.66
10 total
746 100 18823 100