GRB 221201A: Swift-BAT refined analysis
Abstract
Using the data set from T-239 to T+941 sec from the recent telemetry downlink, we report further analysis of BAT GRB 221201A (trigger #1142847) (Troja et al., GCN Circ. 32998). The BAT ground-calculated position is RA, Dec = 266.903, -68.230 deg which is RA(J2000) = 17h 47m 36.6s Dec(J2000) = -68d 13' 48.2" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 51%. The mask-weighted light curve shows a single peaked pulse. T90 (15-350 keV) is 33.71 +- 2.03 sec (estimated error including systematics). The time-averaged spectrum from T-20.88 to T+22.92 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.63 +- 0.05. The fluence in the 15-150 keV band is 8.6 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-13.51 sec in the 15-150 keV band is 11.2 +- 0.6 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/1142847/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- December 2022
- Bibcode:
- 2022GCN.33013....1S