GRB 221202A: Swift-BAT refined analysis
Abstract
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 221202A (trigger #1142997) (Caputo et al. GCN Circ. 33005). The BAT ground-calculated position is RA, Dec = 77.002, -59.836 deg which is RA(J2000) = 05h 08m 00.5s Dec(J2000) = -59d 50' 09.0" with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 85%. The mask-weighted light curve shows a single peaked pulse. T90 (15-350 keV) is 10.34 +- 1.21 sec (estimated error including systematics). The time-averaged spectrum from T+1.03 to T+12.44 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.25. The fluence in the 15-150 keV band is 3.2 +- 0.6 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+3.31 sec in the 15-150 keV band is 0.7 +- 0.2 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/1142997/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- December 2022
- Bibcode:
- 2022GCN.33015....1B