GRB 210112A: 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 210112A (trigger #1016881) (Ambrosi et al., GCN Circ. 29289). The BAT ground-calculated position is RA, Dec = 219.005, 33.058 deg which is RA(J2000) = 14h 36m 01.3s Dec(J2000) = +33d 03' 30.4" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 89%. The mask-weighted light curve shows a multi-peaked structure that starts at ~T-10 s and ends at ~T+220 s. The three main peaks occur at ~T+1 s, ~T+70 s, and ~T+105 s, respectively, and the one at ~T+70 s is the largest peak. T90 (15-350 keV) is 107.60 +- 13.02 sec (estimated error including systematics). The time-averaged spectrum from T-10.44 to T+218.47 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.45 +- 0.03. The fluence in the 15-150 keV band is 2.33 +- 0.03 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+68.86 sec in the 15-150 keV band is 20.5 +- 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/1016881/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- January 2021
- Bibcode:
- 2021GCN.29297....1S