TITLE: GCN CIRCULAR NUMBER: 20017 SUBJECT: GRB 161007A: Swift-BAT refined analysis DATE: 16/10/08 21:13:40 GMT FROM: Takanori Sakamoto at AGU M. Stamatikos (OSU), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), V. D'Elia (ASDC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (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 161007A (trigger #716127) (D'Elia, et al., GCN Circ. 20008). The BAT ground-calculated position is RA, Dec = 103.408, 23.289 deg which is RA(J2000) = 06h 53m 37.9s Dec(J2000) = +23d 17' 18.8" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 87%. The mask-weighted light curve shows a peak starting from T+20 sec, peaking at T+40 sec and ending at T+100 sec. There is a hint of an extended emission up to T+250 sec. T90 (15-350 keV) is 201.7 +- 40.3 sec (estimated error including systematics). The time-averaged spectrum from T+18.2 to T+105.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.46 +- 0.18. The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+33.81 sec in the 15-150 keV band is 0.4 +- 0.1 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/716127/BA/