TITLE: GCN CIRCULAR NUMBER: 41396 SUBJECT: GRB 250814A: Swift-BAT refined analysis DATE: 25/08/15 21:11:04 GMT FROM: Amy <yarleen@gmail.com> H. A. Krimm (NSF), S. D. Barthelmy (GSFC), R. Caputo (GSFC), R. Gupta (GSFC), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (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-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 250814A (trigger #1342439) (Caputo et al., GCN Circ. 41358). The BAT ground-calculated position is RA, Dec = 306.313, 48.406 deg which is RA(J2000) = 20h 25m 15.2s Dec(J2000) = +48d 24' 23.1" with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 54%. The mask-weighted light curve shows a single-pulse structure that starts at ~T0 and peaks at ~T+10 s. The main pulse ends at ~T+25 s, but there is some weak emission that lasts till ~T+100 s. T90 (15-350 keV) is 110.11 +- 47.90 sec (estimated error including systematics). The time-averaged spectrum from T+1.06 to T+125.36 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.91 +- 0.21. The fluence in the 15-150 keV band is 1.4 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+10.22 sec in the 15-150 keV band is 0.8 +- 0.2 ph/cm2/sec. 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/1342439 View this GCN Circular online at https://gcn.nasa.gov/circulars/41396. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...