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GCN Circular 7938

Subject

GRB 080703, Swift-BAT refined analysis

Date

2008-07-03T23:21:52Z (17 years ago)

From

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

T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC),
J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD),
D. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU),
J. Tueller (GSFC), T. Ukwatta (GWU), H. Ziaeepour (UCL-MSSL)
(i.e. the Swift-BAT team):
 
Using the data set from T-120 to T+183 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 080703 (trigger #315819)
(Ziaeepour, et al., GCN Circ. 7936Loading...
 
 ).  The BAT ground-calculated position is
RA, Dec = 101.822, -63.211 deg, which is 
   RA(J2000)  =  06h 47m 17.2s 
   Dec(J2000) = -63d 12' 40.7" 
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 53%.
 
The mask-weighted light curve shows a single peak starting at ~T-5 sec,
peaking at ~T+0 sec, and ending at ~T+4 sec.
T90 (15-350 keV) is 3.4 +- 0.8 sec (estimated error including systematics).
 
The time-averaged spectrum from T-1.7 to T+2.1 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.53 +- 0.22.  The fluence in the 15-150 keV band is 2.0 +- 0.3 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+0.04 sec in the 15-150 keV band
is 1.0 +- 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/315819/BA/