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GCN Circular 7913

Subject

GRB 080701A, Swift-BAT refined analysis

Date

2008-07-01T13:30:11Z (17 years ago)

From

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

E. Fenimore (LANL), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC),
J. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL),
T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU),
M. C. Stroh (PSU), J. Tueller (GSFC), T. Ukwatta (GWU)
(i.e. the Swift-BAT team):
 
Using the data set from T-120 to T+285 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 080701A (trigger #315615)
(Stroh, et al., GCN Circ. 7910Loading...
 
 ).  The BAT ground-calculated position is
RA, Dec = 45.944, 75.481 deg which is 
   RA(J2000)  =  03h 03m 46.5s 
   Dec(J2000) = +75d 28' 50.7" 
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 55%.
 
The mask-weighted light curve shows a single FRED-like peak starting
at ~T-2 sec, peaking at ~T+0 sec, and ending at ~T+20 sec.
T90 (15-350 keV) is 18 +- 9 sec (estimated error including systematics).
 
The time-averaged spectrum from T-2.7 to T+24.6 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
2.24 +- 0.17.  The fluence in the 15-150 keV band is 7.1 +- 0.7 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-0.08 sec in the 15-150 keV band
is 2.2 +- 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/315615/BA/