GRB 200215A: 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 200215A (trigger #956639) (Bernardini, et al., GCN Circ. 27079). The BAT ground-calculated position is RA, Dec = 34.100, 12.775 deg which is RA(J2000) = 02h 16m 24.1s Dec(J2000) = +12d 46' 31.7" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 73%. The mask-weighted light curve shows a single symmetrical peak from roughly -10 sec to +6 sec, peaking at T+0 sec. T90 (15-350 keV) is 11.7 +- 2.2 sec (estimated error including systematics). The time-averaged spectrum from T-9.97 to T+5.37 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.41 +- 0.09. The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.16 sec in the 15-150 keV band is 2.7 +- 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/956639/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2020
- Bibcode:
- 2020GCN.27098....1B