GRB 201020A: Swift-BAT refined analysis
Abstract
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 201020A (trigger #1000926) (Ambrosi et al., GCN Circ.28696). The BAT ground-calculated position is RA, Dec = 261.239, 31.428 deg which is RA(J2000) = 17h 24m 57.4s Dec(J2000) = +31d 25' 41.8" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 90%. The mask-weighted light curve shows a single symmetrical peak starting at ~T+8 sec, peaking at T+17 sec, and decaying to background by T+26 sec. T90 (15-350 keV) is 14.17 +- 4.68 sec (estimated error including systematics). The time-averaged spectrum from T+8.23 to T+30.17 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.25 +- 0.14. The fluence in the 15-150 keV band is 9.2 +- 0.7 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+17.17 sec in the 15-150 keV band is 2.1 +- 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/1000926/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- October 2020
- Bibcode:
- 2020GCN.28705....1S