GRB 231117A: Swift-BAT refined analysis
Abstract
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 231117A (trigger #1197027) (Laha, et al., GCN Circ. 35071). The BAT ground-calculated position is RA, Dec = 332.404, 13.516 deg which is RA(J2000) = 22h 09m 37.0s Dec(J2000) = +13d 30' 58.1" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 83%. The mask-weighted light curve shows a very strong fast rise exponential decay profile with potential precursor emission prior to the main pulse. T90 (15-350 keV) is 0.67 +- 0.07 sec (estimated error including systematics). The time-averaged spectrum from T-0.42 to T+1.30 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.55 +- 0.04. The fluence in the 15-150 keV band is 2.3 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-0.05 sec in the 15-150 keV band is 28.9 +- 0.7 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/1197027/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2023
- Bibcode:
- 2023GCN.35152....1M