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GCN Circular 11527

Subject

GRB 110106A: Swift-BAT refined analysis

Date

2011-01-06T23:36:30Z (14 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), E. E. Fenimore (LANL), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), V. Mangano (INAF-IASFPA),
D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC),
G. Sato (ISAS), J. Tueller (GSFC), T. N. Ukwatta (GWU)
(i.e. the Swift-BAT team):
 
Using the data set from T-61 to T+242 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 110106A (trigger #441664)
(Mangano, et al., GCN Circ. 11520Not found
 
 
).  The BAT ground-calculated position is
RA, Dec = 79.295, 64.199 deg, which is 
   RA(J2000)  =  05h 17m 10.8s 
   Dec(J2000) = +64d 11' 56.4" 
with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 34%.
 
The mask-weighted light curve shows a pulse starting at ~T-1 sec and
lasting about 6 sec.  T90 (15-350 keV) is 4.3 +- 1.1 sec
(estimated error including systematics).
 
The time-averaged spectrum from T-1.0 to T+3.9 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.71 +- 0.28.  The fluence in the 15-150 keV band is 3.0 +- 0.5 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+0.32 sec in the 15-150 keV band
is 1.9 +- 0.3 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/441664/BA/