TITLE: GCN CIRCULAR NUMBER: 6911 SUBJECT: GRB 071013, Swift-BAT refined analysis DATE: 07/10/13 17:24:19 GMT FROM: Scott Barthelmy at NASA/GSFC D. Palmer (LANL), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), F. Marshall (GSFC), 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-119 to T+183 sec from recent telemetry downlinks, we report further analysis of BAT GRB 071013 (trigger #294120) (Marshall, et al., GCN Circ. 6907). The BAT ground-calculated position is RA, Dec = 279.501, 33.846 deg which is RA(J2000) = 18h 38m 0.3s Dec(J2000) = 33d 50' 46" with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 70%. The mask-weighted light curve shows a single peak starting at ~T-5 sec, peaking at ~T+5sec, and ending at ~T+30 sec. T90 (15-350 keV) is 26 +- 1 sec (estimated error including systematics). The time-averaged spectrum from T-5.9 to T+23.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.60 +- 0.36. The fluence in the 15-150 keV band is 3.2 +- 0.7 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+3.69 sec in the 15-150 keV band is 0.4 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.