GCN Circular 23344
Subject
Trigger 867343: Swift detection of SGR1806-20
Date
2018-10-16T15:54:43Z (6 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@milkyway.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC),
J. A. Kennea (PSU), B. Sbarufatti (PSU) and A. Tohuvavohu (PSU) report
on behalf of the Neil Gehrels Swift Observatory Team:
At 15:40:15 UT, the Swift Burst Alert Telescope (BAT) triggered and
located SGR1806-20 (trigger=867343). Swift did not slew to the source
because of an observing constraint. The BAT on-board calculated location is
RA, Dec 272.130, -20.376, which is
RA(J2000) = 18h 08m 31s
Dec(J2000) = -20d 22' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows two peaks
with a duration of about 2 sec. The peak count rate
was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger.
Due to a Moon observing constraint, Swift cannot slew to the BAT
position until 2018 October 16 at 21:16 UT. A Swift XRT/UVOT
observation is planned for October 17th starting a 01:07 UT.