TITLE: GCN CIRCULAR NUMBER: 19749 SUBJECT: GRB 160801A: Swift-BAT refined analysis DATE: 16/08/01 17:43:33 GMT FROM: Hans Krimm at NASA-GSFC J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), 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-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 160801A (trigger #706871) (D'Elia, et al., GCN Circ. 19744). The BAT ground-calculated position is RA, Dec = 212.763, 13.485 deg which is RA(J2000) = 14h 11m 03.2s Dec(J2000) = +13d 29' 06.5" with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 73%. The mask-weighted light curve shows a single peak with ~3 second duration, peaking at T+0. T90 (15-350 keV) is 2.85 +- 0.41 sec (estimated error including systematics). The time-averaged spectrum from T-1.34 to T+1.83 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.85 +- 0.22. The fluence in the 15-150 keV band is 1.7 +- 0.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.02 sec in the 15-150 keV band is 1.2 +- 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/706871/BA/