TITLE: GCN CIRCULAR NUMBER: 6842 SUBJECT: GRB 071003, Swift-BAT refined analysis DATE: 07/10/03 22:22:49 GMT FROM: Scott Barthelmy at NASA/GSFC T. Ukwatta (GWU), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (GSFC/ISAS), P. Schady (MSSL-UCL), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) (i.e. the Swift-BAT team): Using the data set from T-239 to T+584 sec from recent telemetry downlinks, we report further analysis of BAT GRB 071003 (trigger #292934) (Schady, et al., GCN Circ. 6837). The BAT ground-calculated position is RA, Dec = 301.857, 10.954 deg which is RA(J2000) = 20h 07m 25.8s Dec(J2000) = 10d 57' 16" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 34%. The mask-weighted light curve shows a strong first peak with multiple overlapping subpeaks starting at ~T-20sec, peaking at T+0 sec, and ending at ~T+55 sec. The second, much weaker peak starts at ~T+130 sec, peaks at ~T+145 sec, and ends at ~T+220 sec. T90 (15-350 keV) is 150 +- 10 sec (estimated error including systematics). The time-averaged spectrum from T-7.6 to T+167.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.36 +- 0.07. The fluence in the 15-150 keV band is 8.3 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.37 sec in the 15-150 keV band is 6.3 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence level.