GRB 210610A: Swift-BAT refined analysis
Abstract
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 210610A (trigger #1054627) (Page et al., GCN Circ. 30160). The BAT ground-calculated position is RA, Dec = 204.284, 14.476 deg which is RA(J2000) = 13h 37m 08.2s Dec(J2000) = +14d 28' 32.5" with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 26%. The mask-weighted light curve shows a structure with two overlapping pulses that starts at ~T-6 s and ends at ~T+11 s. The two peaks occur at ~T-2 s and ~T0, respectively. T90 (15-350 keV) is 13.62 +- 3.15 sec (estimated error including systematics). The time-averaged spectrum from T-5.98 to T+11.35 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.41 +- 0.19. The fluence in the 15-150 keV band is 1.0 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.29 sec in the 15-150 keV band is 2.5 +- 0.4 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/1054627/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2021
- Bibcode:
- 2021GCN.30186....1B