[vsnet-grb-info 11846] Trigger 519868: Swift detection of SGR1806-20

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13237
SUBJECT: Trigger 519868: Swift detection of SGR1806-20
DATE:    12/04/10 23:23:06 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <scott at milkyway.gsfc.nasa.gov>

S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB),
N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU),
C. B. Markwardt (NASA/GSFC) and B. Sbarufatti (INAF-OAB/PSU) report on
behalf of the Swift Team:

At 23:08:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located an outburst from SGR1806-20 (trigger=519868).  Swift did not slew because
of the Moon observering constraint.  The BAT on-board calculated location is 
RA, Dec 272.153, -20.410 which is 
   RA(J2000)  =  18h 08m 37s
   Dec(J2000) = -20d 24' 35"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single spike
with a duration of about 0.2 sec.  The peak count rate
was ~13,000 counts/sec (15-350 keV), at ~0 sec after the trigger. 

Due to an observing constraint Swift will be unable to observe this
field with the XRT and UVOT instruments until 12 April at 14:00 UT.