GRB 210730A: Swift-BAT refined analysis
Abstract
Using the data set from T-240 to T+200 sec from the recent telemetry downlink, we report further analysis of BAT GRB 210730A (trigger #1062150) (Sonbas et al., GCN Circ. 30548). The BAT ground-calculated position is RA, Dec = 149.570, 69.703 deg which is RA(J2000) = 09h 58m 16.8s Dec(J2000) = +69d 42' 12.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 55%. The mask-weighted light curve shows a single-peaked structure that starts at ~T-0.5, peaks at ~T+0.5, and ends at ~T+5. T90 (15-350 keV) is 3.86 +- 0.66 sec (estimated error including systematics). The time-averaged spectrum from T-0.32 to T+5.01 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.41 +- 0.11. The fluence in the 15-150 keV band is 1.3 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.17 sec in the 15-150 keV band is 7.1 +- 0.5 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/1062150/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2021
- Bibcode:
- 2021GCN.30554....1S