TITLE: GCN CIRCULAR NUMBER: 42686 SUBJECT: GRB 251112A: Swift-BAT refined analysis DATE: 25/11/14 20:37:19 GMT FROM: Rahul Gupta at NASA GSFC <rahul.gupta@nasa.gov> D. Sadaula (GSFC/UMBC), S. D. Barthelmy (GSFC), R. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), A. Mei (INAF-OAB) M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), T. Sakamoto (AGU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 251112A (trigger #1413695) (Mei, et al., GCN Circ. 42656). The BAT ground-calculated position is RA, Dec = 274.081, 24.158 deg which is RA(J2000) = 18h 16m 19.5s Dec(J2000) = +24d 09' 28.8" with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted BAT light curve shows multi-peaked emission starting ~T-28 sec. T90 (15-350 keV) is 55.42 +- 6.65 sec (estimated error including systematics). The time-averaged spectrum from T-28.30 to T+32.38 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.77 +- 0.75, and Epeak of 48.4 +- 11.9 keV (chi squared 86.37 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 7.6 +- 0.9 x 10^-07 erg/cm2 and the 1-sec peak flux measured from T+1.05 sec in the 15-150 keV band is 0.7 +- 0.1 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.86 +- 0.15 (chi squared 94.39 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/1413695 View this GCN Circular online at https://gcn.nasa.gov/circulars/42686. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...