GCN Circular 7257
Subject
GRB 080205, Swift-BAT refined analysis
Date
2008-02-05T18:38:21Z (16 years ago)
From
Takanori Sakamoto at NASA/GSFC <Taka.Sakamoto@nasa.gov>
J. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), E. Fenimore (LANL),
N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (GSFC/ISAS),
M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 080205 (trigger #302506)
(Markwardt, et al., GCN Circ. 7250). The BAT ground-calculated
position is RA, Dec = 98.261, 62.782 deg which is
RA(J2000) = 6h 33m 2.6s
Dec(J2000) = 62d 46' 56"
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 52%.
The mask-weighted light curve shows at least 3 peaks at about T+2,
T+65, and T+93 sec. T90 (15-350 keV) is 106.5 +- 5.0 sec (estimated
error including systematics).
The time-averaged spectrum from T-10.1 to T+105.3 sec is best fit by a
simple power-law model. The power law index of the time-averaged
spectrum is 2.08 +- 0.12. The fluence in the 15-150 keV band is
2.1 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from
T+0.22 sec in the 15-150 keV band is 1.4 +- 0.2 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/302506/BA/