GRB 220319A: Swift-BAT refined analysis
Abstract
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 220319A (trigger #1098132) (Page et al., GCN Circ. 31769). The BAT ground-calculated position is RA, Dec = 218.139, 61.291 deg which is RA(J2000) = 14h 32m 33.4s Dec(J2000) = +61d 17' 26.6" with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 43%. The BAT light curve showed a single-peaked structure with a duration of about 10 sec. T90 (15-350 keV) is 6.44 +- 1.54 sec (estimated error including systematics). The time-averaged spectrum from T-0.36 to T+6.56 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.15 +- 0.28. The fluence in the 15-150 keV band is 2.3 +- 0.4 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T-0.24 sec in the 15-150 keV band is 1.5 +- 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/1098132/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- March 2022
- Bibcode:
- 2022GCN.31781....1K