GCN Circular 27657
Subject
Swift detection of multiple bursts from SGR 1935+2154
Date
2020-04-27T18:48:14Z (5 years ago)
From
David Palmer at LANL <palmer@lanl.gov>
S. D. Barthelmy (GSFC), M. G. Bernardini (INAF-OAB),
P. D'Avanzo (INAF-OAB), J.D. Gropp (PSU), J. A. Kennea (PSU),
A. Y. Lien (GSFC/UMBC), A. Melandri (INAF-OAB), D. M. Palmer (LANL),
T. Sbarrato (INAF-OAB) and M. H. Siegel (PSU) report on behalf of the
Neil Gehrels Swift Observatory Team:
At 18:26:20 UT, the Swift Burst Alert Telescope (BAT) triggered and
located a burst from the Soft Gamma Repeater SGR 1935+2154 (Trigger #968211).
Because this is a known source Swift did not automatically slew.
The on-board location is
RA, Dec 293.735, +21.895 which is
RA(J2000) = 19h 34m 56s
Dec(J2000) = +21d 53' 43"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a single
64 ms bin with a peak count rate of 25k counts/sec (15-350 keV),
at the time of the trigger.
A second BAT trigger from this source was seen at 18:32:59
(trigger #968212) with comparable intensity.
Follow-up observations with Swift are planned.