GCN Circular 23337
Subject
Trigger 866993: Swift detection of SGR1806-20
Date
2018-10-14T08:36:08Z (6 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@milkyway.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB) and
A. Melandri (INAF-OAB) report on behalf of the Neil Gehrels Swift
Observatory Team:
At 08:15:34 UT, the Swift Burst Alert Telescope (BAT) triggered and
located SGR1806-20 (trigger=866993). Swift did not slew to the source
because of an observing constraint. The BAT on-board calculated location is
RA, Dec 272.166, -20.380, which is
RA(J2000) = 18h 08m 40s
Dec(J2000) = -20d 22' 48"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows a single peak
with a duration of about 3 sec. The peak count rate
was ~2400 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. No XRT or UVOT follow-ups are planned.