TITLE: GCN CIRCULAR NUMBER: 38010 SUBJECT: GRB 241030A: Swift-BAT refined analysis DATE: 24/10/31 13:57:08 GMT FROM: Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp> H. A. Krimm (NSF), S. D. Barthelmy (GSFC), R. Gupta (GSFC), N. J. Klingler (GSFC/UMBC/CRESSTII), 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-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 241030A (trigger #1263718) (Klingler, et al., GCN Circ. 37956). The BAT ground-calculated position is RA, Dec = 343.216, 80.438 deg which is RA(J2000) = 22h 52m 51.9s Dec(J2000) = +80d 26' 18.2" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 80%. The mask-weighted light curve shows multiple emission periods. The initial episode starts from T0 following four overlapping pulses, and ends around T+45 sec. Then, the bright episode starts at T+105 sec, peaks at T+148 sec, and ends at T+230 sec. T90 (15-350 keV) is 173.3 +- 5.0 sec (estimated error including systematics). The time-averaged spectrum from T-0.86 to T+276.48 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.03. The fluence in the 15-150 keV band is 2.73 +- 0.04 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+147.45 sec in the 15-150 keV band is 11.8 +- 0.3 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/1263718 View this GCN Circular online at https://gcn.nasa.gov/circulars/38010. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...