TITLE: GCN CIRCULAR NUMBER: 35386 SUBJECT: GRB 231215A: Swift-BAT refined analysis DATE: 23/12/17 04:59:08 GMT FROM: Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp> S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU), M. Stamatikos (OSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 231215A (trigger #1202522) (D'Avanzo, et al., GCN Circ. 35343). The BAT ground-calculated position is RA, Dec = 9.730, 57.634 deg which is RA(J2000) = 00h 38m 55.1s Dec(J2000) = +57d 38' 00.8" with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 6%. The mask-weighted light curve shows a structure of several overlapping pulses. The emission starts from T-10 s, peaks at T0 and ends at T+20 s. T90 (15-350 keV) is 20.75 +- 3.69 sec (estimated error including systematics). The time-averaged spectrum from T-7.04 to T+19.79 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.01 +- 0.09. The fluence in the 15-150 keV band is 1.0 +- 0.1 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+0.18 sec in the 15-150 keV band is 9.6 +- 1.4 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/1202522/BA/ View this GCN Circular online at https://gcn.nasa.gov/circulars/35386. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...