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Table 1

Observation log.

Point Satellite/instrument Observation Start time Stop time Tfold
(UT) (UT) (MJD, TDB)

1 OSO-8/GCXSE 1978 Apr. 07 21:16:05 1978 Apr. 14 22:20:37 43 609.408575724435
2 Einstein/IPC 1979 Oct. 22 04:52:01 1979 Oct. 22 06:58:30 44 168.24670380917
3 Einstein/IPC 1980 Oct. 11 04:08:51 1980 Oct. 11 09:07:19 44 523.27644368849
4 EXOSAT/ME 1983 Sep. 17 15:07:25 1983 Sep. 17 21:29:49 45 594.765324269885
5 EXOSAT/ME 1985 May 24 12:26:21 1985 May 24 21:30:23 46 209.612747685185
6 EXOSAT/ME 1985 Oct. 13 13:53:16 1985 Oct. 13 22:34:04 46 351.75944524423
7 Ginga/LAC 1988 Sep. 09 15:47:56 1988 Sep. 10 16:01:16 47 414.165911835925
8 Ginga/LAC 1990 Sep. 11 15:04:35 1990 Sep. 13 09:18:11 48 146.51075733274
9 ROSAT/PSPC RP400274N00 1992 Oct. 17 13:05:47 1992 Oct. 19 15:24:20 48 913.59379352164
10 ASCA/GIS3 40004000 1993 May 02 18:11:00 1993 May 03 09:46:17 49 110.082393510115
11 RXTE/PCA P10109-01-01-00, P10109-01-02-00, 1996 Feb. 02 00:14:56 1996 May 23 11:20:00 50 174.74129123185
P10109-01-04-01, P10109-01-04-00,
P10109-02-01-00, P10109-02-02-00,
P10109-02-03-00, P10109-02-04-00,
P10109-02-05-00, P10109-02-06-00,
P10109-02-07-00,P10109-02-08-00,
P10109-02-09-00, P10109-02-10-00,
P10109-02-10-02
12 RXTE/PCA P10109-01-05-00, P10109-01-06-00, 1996 Jun. 01 17:38:40 1996 Oct. 29 11:00:34 50 310.596956288645
P10109-01-07-00, P10109-01-08-00,
P10109-01-09-00
13 BeppoSAX/MECS 20106001 1997 Apr. 27 21:00:06 1997 Apr. 28 19:51:02 50 566.35264963594
14 RXTE/PCA P30066-01-01-04, P30066-01-01-00, 1998 Jun. 23 23:06:40 1998 Jul. 20 15:35:55 51 001.306447481845
P30066-01-01-01, P30066-01-01-02,
P30066-01-01-03, P30066-01-02-00,
P30066-01-02-01, P30066-01-02-02,
P30066-01-02-03
15 RXTE/PCA P30066-01-02-04, P30066-01-02-07, 1998 Jul. 21 07:11:44 1998 Sep. 16 02:52:32 51 043.70980975036
P30066-01-02-08, P30066-01-03-00,
P30066-01-03-01, P30066-01-03-02,
P30066-01-03-03, P30066-01-03-04,
P30066-01-03-05, P30066-01-04-00
16 RXTE/PCA P30066-01-05-01, P30066-01-05-00, 2001 May 27 08:14:47 2001 Jul. 01 19:15:33 52 074.07302734295
P30066-01-06-00, P30066-01-06-01,
P30066-01-07-00, P30066-01-07-01
17 BeppoSAX/MECS 21373002 2001 Oct. 01 03:40:16 2001 Oct. 02 07:01:06 52 183.72270184033
18 RXTE/PCA P50026-03-01-00, P50026-03-01-01 2001 Oct. 01 10:35:44 2001 Oct. 01 22:16:03 52 183.684644754605
19 RXTE/PCA P70034-02-02-01, P70034-02-02-00 2002 Sep. 25 00:43:12 2002 Sep. 25 09:31:12 52 542.21332826887
20 XMM/Epic-pn 0085290301 2002 Sep. 25 04:18:29 2002 Sep. 25 08:28:27 52 542.266295747205
21 INTEGRAL/JEM-X 2003 Nov. 09 09:04:11 2003 Nov. 20 12:18:01 52 957.945226848465
22 Chandra/HETGS 4584 2004 Aug. 07 02:34:45 2004 Aug. 07 16:14:53 53 224.59478392645
23 Suzaku/XIS0 401095010 2006 Nov. 08 06:09:51 2006 Nov. 09 02:42:02 54 048.3655207864
24 RXTE/PCA P95093-01-01-00, P95093-01-01-01 2010 Jun. 19 13:41:52 2010 Jun. 21 07:21:46 55 367.43875650959
25 Chandra/LETGS 15271, 15657 2013 Jun. 15 13:56:17 2013 Jun. 18 05:13:17 56 459.89915961875
26 Swift/XRT 00033336001 2014 Jul. 15 08:04:57 2014 Jul. 15 22:36:46 56 853.63959388178
27 Suzaku/XIS0 409032010, 409032020 2014 Oct. 14 16:49:56 2014 Oct. 22 2:40:56 56 949.56345974802

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