Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 23337

Trigger 866993: Swift detection of SGR1806-20
2018-10-14T08:36:08Z (6 years ago)
Scott Barthelmy at NASA/GSFC <>
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.
Looking for U.S. government information and services? Visit