TITLE: GCN CIRCULAR NUMBER: 20178 SUBJECT: GRB 161113A: Swift-BAT refined analysis DATE: 16/11/15 14:49:29 GMT FROM: Hans Krimm at NSF/NASA-GSFC S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. D'Avanzo (INAF-OAB), N. Gehrels (GSFC), H. A. Krimm (NSF/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-240 to T+499 sec from the recent telemetry downlink, we report further analysis of BAT GRB 161113A (trigger #722063) (D'Avanzo, et al., GCN Circ. 20172). The BAT ground-calculated position is RA, Dec = 179.794, -5.316 deg which is RA(J2000) = 11h 59m 10.6s Dec(J2000) = -05d 18' 57.3" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a pair of overlapping peaks, both containing substructure. The first peak begins at T-3 sec and peaks at T+5 sec. The second peaks at T+15 sec and continues until about T+60 sec. T90 (15-350 keV) is 42.60 +- 11.10 sec (estimated error including systematics). The time-averaged spectrum from T+0.12 to T+64.88 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.73 +- 0.10. The fluence in the 15-150 keV band is 1.5 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+15.28 sec in the 15-150 keV band is 1.4 +- 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/722063/BA/