TITLE: GCN CIRCULAR NUMBER: 42278 SUBJECT: GRB 251014A: Swift-BAT refined analysis DATE: 25/10/15 01:35:52 GMT FROM: Rahul Gupta at NASA GSFC <rahul.gupta@nasa.gov> M. J. Moss (GSFC), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), R. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU) (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 251014A (trigger #1403878) (Ambrosi, et al., GCN Circ. 42238). The BAT ground-calculated position is RA, Dec = 111.728, 6.420 deg which is RA(J2000) = 07h 26m 54.7s Dec(J2000) = +06d 25' 10.7" with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 78%. The BAT mask-weighted light curve shows a single peaked emission with total duration of less than 2 sec. T90 (15-350 keV) is 1.56 +- 0.24 sec (estimated error including systematics). The time-averaged spectrum from T-0.07 to T+1.82 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.82 +- 0.70, and Epeak of 47.1 +- 9.2 keV (chi squared 60.50 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 2.3 +- 0.2 x 10^-07 erg/cm2 and the 1-sec peak flux measured from T-0.07 sec in the 15-150 keV band is 2.8 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.90 +- 0.13 (chi squared 69.47 for 57 d.o.f.). All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1403878 View this GCN Circular online at https://gcn.nasa.gov/circulars/42278. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...