Swift-BAT observations of SGR 1900+14

Detected Burst Times

Times of bursts detected on-board by BAT. Note that the onboard sometimes produces multiple measurements of a single burst with different start times and times and timescales, while ignoring smaller bursts that occur within a minute of the large burst. Thus not all individual bursts within a burst sequence are listed. Image fluence is over 15-50 keV and adjusted by coded area. Use these numbers only for relative intensity.
UTC Image Fluence Image Duration (s) delta T (s)
2006-03-25 10:12:04 0.363 0.032
2006-03-25 18:07:20 0.040 0.128 28516
2006-03-25 18:07:20 0.032 0.064
2006-03-25 20:16:40 0.010 0.008 7761
2006-03-25 23:34:07 0.006 0.032 11846
2006-03-26 00:59:22 0.011 0.016 5115
2006-03-26 13:30:04 0.008 0.016 45042
2006-03-26 16:50:17 0.008 0.008 12013
2006-03-28 01:00:15 0.023 0.008 115799
2006-03-28 11:57:22 0.029 0.016 39426
2006-03-28 11:59:15 0.104 0.032 113
2006-03-28 20:11:28 0.018 0.128 29533
2006-03-28 20:32:30 0.015 0.008 1262
2006-03-28 21:37:02 0.026 0.032 3872
2006-03-28 23:10:07 0.041 0.128 5584
2006-03-28 23:10:07 0.017 0.032
2006-03-29 00:56:01 0.089 0.032 6355
2006-03-29 01:14:08 0.019 0.128 1086
2006-03-29 01:14:08 0.014 0.064
2006-03-29 01:15:44 0.069 0.016 96
2006-03-29 01:28:04 1.029 0.128 740
2006-03-29 02:39:43 1.539 136 4299
2006-03-29 02:39:43 3.656 336
2006-03-29 02:40:02 0.017 0.016 20
2006-03-29 02:40:05 0.097 0.032 3
2006-03-29 02:40:51 0.762 0.128 46
2006-03-29 02:40:51 0.822 0.512
2006-03-29 02:40:51 0.287 0.016
2006-03-29 02:41:59 2.098 136 68
2006-03-29 02:42:11 0.013 0.008 12
2006-03-29 02:42:25 0.195 0.032 15
2006-03-29 02:43:10 0.036 0.016 44
2006-03-29 02:43:25 1.070 16.384 15
2006-03-29 02:43:33 0.865 0.128 8
2006-03-29 02:43:33 0.339 0.016
2006-03-29 02:43:45 0.264 0.256 12
2006-03-29 02:45:29 0.051 0.008 104
2006-03-29 02:45:29 1.906 0.128
2006-03-29 02:46:32 1.351 0.512 63
2006-03-29 02:46:32 1.203 0.128
2006-03-29 02:47:04 0.215 8.192 32
2006-03-29 02:47:46 0.089 0.016 42
2006-03-29 02:47:50 0.500 0.128 4
2006-03-29 02:48:46 0.011 0.016 55
2006-03-29 02:49:02 0.028 0.032 16
2006-03-29 02:49:42 0.212 1.024 41
2006-03-29 02:49:43 0.242 0.256 1
2006-03-29 02:49:43 0.199 0.064
2006-03-29 02:50:21 0.125 0.256 38
2006-03-29 02:51:11 0.076 0.064 50
2006-03-29 02:51:27 0.203 8.192 16
2006-03-29 02:51:30 0.204 0.032 3
2006-03-29 02:52:22 0.046 0.064 52
2006-03-29 02:52:37 0.152 0.016 15
2006-03-29 02:52:37 0.965 0.128
2006-03-29 02:53:09 2.585 0.128 32
2006-03-29 04:21:27 0.907 320 5298
2006-03-29 04:23:25 0.012 0.008 118
2006-03-29 04:23:56 0.336 8.192 31
2006-03-29 04:23:57 0.074 0.016
2006-03-29 04:23:57 0.219 0.032
2006-03-29 04:24:31 0.468 72 34
2006-03-29 04:24:33 0.117 0.016 2
2006-03-29 04:28:14 0.010 0.032 221
2006-03-29 04:34:51 0.034 0.128 397
2006-03-29 04:34:51 0.019 0.032
2006-03-29 04:35:18 0.070 0.032 27
2006-03-29 04:39:46 0.279 0.128 268
2006-03-29 04:39:46 0.227 0.064
2006-03-29 06:02:22 0.026 0.008 4957
2006-03-29 07:57:18 0.064 0.064 6896
2006-03-29 08:00:22 0.023 0.032 184
2006-03-29 12:19:51 0.016 0.032 15569
Table 1: Times of some SGR bursts.

Period of intense activity

Figure 1: Detected source flux during period of intense activity with 64 ms timescale. Horizontal zero of the plot (MET 165292691 = 2006-03-29 02:38:10) is the beginnning of the observation. Some individual bursts (especially during the storm around +900 seconds in the plot) caused wrapping in the internal counters and so the vertical scale is truncated.

The storm

Figure 2: Detail of the storm plotted with 1ms timescale. Vertical axis is counts/ms ~12-100 keV. Horizontal zero of the plot is MET 165293500 = 2006-03-29 02:51:39. This is a wide plot, you may have to scroll your browser window to the right.

The GCN contact is: Scott Barthelmy, scott@lheamail.gsfc.nasa.gov, (301)-286-3106