TITLE: GCN CIRCULAR NUMBER: 26198 SUBJECT: GRB 191106A: Swift-BAT refined analysis DATE: 19/11/07 13:20:21 GMT FROM: Amy Lien at GSFC S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), F. E. Marshall (NASA/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-61 to T+242 sec from the recent telemetry downlink, we report further analysis of BAT GRB 191106A (trigger #933515) (Marshall et al., GCN Circ. 26177). The BAT ground-calculated position is RA, Dec = 269.356, 46.046 deg which is RA(J2000) = 17h 57m 25.4s Dec(J2000) = +46d 02' 44.7" with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 95%. The mask-weighted light curve shows many overlapping pulses. The burst emission starts at ~T-1.3 s and ends at ~T+2.4 s. T90 (15-350 keV) is 3.42 +- 0.35 sec (estimated error including systematics). The time-averaged spectrum from T-1.31 to T+2.38 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.89 +- 0.17. The fluence in the 15-150 keV band is 3.2 +- 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 1.1 +- 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/933515/BA/