[vsnet-grb-info 11216] GRB 111208A found in ground analysis of BAT data

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12628
SUBJECT: GRB 111208A found in ground analysis of BAT data
DATE:    11/12/08 16:35:58 GMT
FROM:    Takanori Sakamoto at NASA/GSFC  <takanori at milkyway.gsfc.nasa.gov>

T. Sakamoto (GSFC/UMBC), C. Graziani (U of Chicago), J. R. Cummings (GSFC/UMBC), 
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), 
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), 
D. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), 
T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):

Automated BAT ground analysis found a burst that occurred at 08:28:11 UT 
with a significance of 10.1 sigma (15-200 keV) from the failed event data 
of trigger #509285.  The event is temporally coincident with the Fermi GBM 
345025692.  The best BAT location is RA, Dec = 290.2151, +40.6686 deg, which is

  RA(J2000)  =  19h 20m 51.6s 
  Dec(J2000) = +40d 40' 07.0" 

with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 10%.

The mask-weighted light curve created from the failed event data 
(available from 08:28:12 to 08:28:22 UT) shows a constant positive 
rate from the beginning of the data and then decaying at 08:28:20 UT.