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GCN Circular 11691

Subject

GRB 110210A: Swift-BAT refined analysis

Date

2011-02-10T18:30:41Z (13 years ago)

From

Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>

M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), V. D'Elia (ASDC), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL),
T. Sakamoto (GSFC/UMBC), J. Tueller (GSFC), T. N. Ukwatta (GWU)
(i.e. the Swift-BAT team):
 
Using the data set from T-239 to T+963 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 110210A (trigger #445141)
(D'Elia, et al., GCN Circ. 11687Not found
 
 
).  The BAT ground-calculated position is
RA, Dec = 13.108, 7.778 deg, which is 
   RA(J2000)  =  00h 52m 25.9s 
   Dec(J2000) = +07d 46' 39.5" 
with an uncertainty of 3.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 83%.
 
The mask-weighted light curve shows the emission starting at ~T-100 sec,
peaking at ~T+50 sec, and ending at ~T+150 sec.  T90 (15-350 keV) is
233 +- 60 sec (estimated error including systematics).
 
The time-averaged spectrum from T-102.9 to T+153.6 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.73 +- 0.29.  The fluence in the 15-150 keV band is 9.6 +- 1.9 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-54.44 sec in the 15-150 keV band
is 0.3 +- 0.1 ph/cm2/sec.  All the quoted errors are at the 90% confidence
level. 
 
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/445141/BA/