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Table 1

Log of all Swift /XRT observations used in this work.

Sequence Obs/mode Start time (UT) End time (UT) Exposure N H k T diskbb N diskbb F 0.5−10 keV a /d.o.f.
(UTC) (UTC) (s) (1022 cm-2) (keV) (10-10 erg cm-2 s-1)

00037734002 XRT/PC 2014-09-05 15:28:19 2014-09-05 18:48:54 1655 4.6 ± 0.6 1.0 ± 0.1 11.6 0.79 1.16/35
00037734003 XRT/PC 2014-09-09 10:03:10 2014-09-09 10:35:53 1963 5.7 1.2 ± 0.1 8.9 1.06 0.86/51
00037734005 XRT/PC 2014-09-10 02:15:12 2014-09-10 12:09:56 1730 5.7 1.1 ± 0.1 9.0 0.69 0.83/31
00037734006 XRT/WT 2014-09-10 18:32:26 2014-09-10 23:03:06 1980 5.2 ± 0.5 1.4 ± 0.1 3.6 0.90 0.79/94
00037734007 XRT/WT 2014-09-11 16:50:33 2014-09-11 18:43:31 1992 5.4 ± 0.4 1.11 ± 0.06 13.0 1.20 1.03/147
00037734008 XRT/PC 2014-09-15 06:45:57 2014-09-15 08:25:08 955 6.0 ± 1.0 1.2 ± 0.2 11.5 1.44 0.80/29
00037734010 XRT/PC 2014-09-19 15:05:26 2014-09-19 15:22:54 1028 6.7 1.0 ± 0.2 42.4 1.50 0.80/18
00037734013 XRT/PC 2014-09-25 00:28:07 2014-09-25 00:44:55 1008 9.2 ± 4.0 2.0 0.3 0.33 0.44/13
00033439001 XRT/WT 2014-09-25 14:48:06 2014-09-25 15:00:13 724 4.7 ± 0.7 1.5 ± 0.2 2.5 1.18 1.18/51
00033439003 XRT/PC 2014-09-29 09:49:40 2014-09-29 10:06:56 1020 6.5 ± 1.0 1.3 ± 0.2 9.7 1.63 0.98/38
00033439004 XRT/PC 2014-10-03 05:08:51 2014-10-03 10:03:54 1111 6.4 ± 1.3 1.4 ± 0.2 4.6 1.36 0.46/25
00033439007 XRT/WT 2014-10-09 01:55:37 2014-10-09 02:10:57 904 7.4 1.7 0.5 0.36 0.61/18
00033439008 XRT/WT 2014-10-12 08:06:00 2014-10-12 08:25:58 1172 6.0 1.4 ± 0.2 8.4 2.05 0.93/54
00033439009 XRT/WT 2014-10-15 00:07:46 2014-10-15 00:23:29 936 6.3 ± 0.6 1.2 ± 0.1 15.6 1.82 0.98/100
00033439010 XRT/WT 2014-10-18 04:47:25 2014-10-18 05:03:58 971 5.9 ± 0.6 1.2 ± 0.1 12.3 1.57 1.11/87
00033439011 XRT/WT 2014-10-21 13:03:02 2014-10-21 13:19:58 1005 6.1 ± 0.6 1.09 ± 0.07 22.6 1.70 1.09/104
00033439012 XRT/WT 2014-10-24 11:02:12 2014-10-24 11:18:57 999 5.9 ± 0.6 1.1 ± 0.1 17.4 1.36 0.93/89
00033439014 XRT/PC 2015-02-03 05:16:37 2015-02-03 06:51:54 1991 5.4 ± 0.6 1.4 ± 0.2 5.3 1.78 1.31/56
00033439015 XRT/WT 2015-02-17 19:00:34 2015-02-17 19:18:58 1100 7.1 ± 0.9 1.4 ± 0.1 6.4 1.42 1.49/84
00033439016 XRT/WT 2015-03-03 21:34:47 2015-03-03 21:52:57 1079 5.8 ± 0.6 1.3 ± 0.1 9.7 1.84 1.11/113
00033439017 XRT/WT 2015-03-17 13:01:51 2015-03-17 13:13:58 706 6.0 ± 0.7 1.0 ± 0.1 23.4 1.31 1.2/61
00033439018 XRT/WT 2015-03-30 14:02:44 2015-03-30 14:17:57 901 4.7 ± 0.5 1.1 ± 0.1 12.4 1.34 1.08/82
00033439020 XRT/PC 2015-04-24 00:03:17 2015-04-24 03:26:56 1504 5.3 ± 1.4 1.1 ± 0.2 6.7 0.53 0.90/20
00033439021 XRT/PC 2015-04-24 04:36:39 2015-04-24 05:04:54 1675 5.4 1.6 0.3 0.19 1.21/13
00033439022 XRT/PC 2015-04-24 08:03:36 2015-04-24 08:24:54 1269 4.8 ± 1.0 1.1 ± 0.1 8.6 0.81 1.01/35
00033439023 XRT/WT 2015-05-09 08:53:36 2015-05-09 09:07:57 839 5.1 ± 1.0 0.86 ± 0.1 20.7 0.48 1.22/33
00033439025b XRT/PC 2015-05-18 22:35:51 2015-05-18 23:09:04 1986 3.7 ± 0.6 1.0 ± 0.1 0.98 0.046 1.22/244
00033439026b XRT/PC 2015-05-23 11:10:38 2015-05-23 13:16:56 697
00033439027b XRT/PC 2015-05-30 09:24:15 2015-05-30 11:00:54 980
00033439028b XRT/PC 2015-06-06 10:53:18 2015-06-06 18:58:55 1667

Notes. For each observation we also list the results of the spectral fit obtained by using an absorbed diskbb model (see Sects. 3 and 4). All uncertainties are given at 90% confidence level.

(a)

Observed flux in units of 10-10 erg cm-2 s-1 (not corrected for absorption).

(b)

We merged data from observations 00033439025 to 00033439028 as in all these cases the statistics was too low to carry out separate meaningful spectral fits. The results obtained from the fits to the merged observations is given in the row corresponding to observation ID. 00033439025.

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