Continued burst activity from SGR 1830-0645

ATel #14208; David Palmer (LANL)
on 24 Nov 2020; 04:13 UT
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David Palmer reports on behalf of the Neil Gehrels Swift Observatory Team:

Since its discovery, SGR 1830-0645 (GCN #28594) has been detected and localized by Swift BAT in 4 additional bursts. One of these bursts was also seen by Swift-XRT and reported in Coti Zelati et al. https://arxiv.org/abs/2011.08653

The current catalog of BAT burst times (UTC) for this source is:

2020-10-05 18:20:35	BAT Pre-discovery (ATel #14088)
2020-10-10 14:49:24	BAT Discovery (GCN #28594)
2020-10-19 13:57:48	BAT (this ATel), Swift-XRT (Coti Zelati et al.)
2020-11-05 02:22:03	BAT (this ATel)
2020-11-11 09:45:06	BAT (this ATel)
2020-11-22 00:41:59	BAT (this ATel)

Not included in this table are 14 additional small bursts seen with Swift-XRT and reported in Coti Zelati et al.. These additional bursts (typically weaker in XRT than the 2020-10-19 13:57:48 burst) were not detected in BAT on-board images even though the XRT points at the center of the BAT FOV.

NICER reports (ATel #14112) more than 20 bursts during its observation, the brightest of which was at 2020-10-17 20:46:30. The source was above BAT's horizon at this time (although outside of BAT's imaging field of view), but the burst was not strong enough to be seen as an increase in BAT's count rate.