GRB 200711A: Swift-BAT refined analysis
Abstract
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200711A (trigger #981957) (Marshall et al., GCN Circ. 28078). The BAT ground-calculated position is RA, Dec = 285.975, -0.134 deg which is RA(J2000) = 19h 03m 53.9s Dec(J2000) = -00d 08' 04.1" with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 8%. The mask-weighted light curve shows a multi-peaked structure that starts at ~T-5 s and ends at ~T+30 s. The three major peaks occur at ~T0, ~T+5 s, and ~T+20 s, respectively. T90 (15-350 keV) is 29.39 +- 3.07 sec (estimated error including systematics). The time-averaged spectrum from T-4.72 to T+29.73 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.42 +- 0.10. The fluence in the 15-150 keV band is 5.3 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.20 sec in the 15-150 keV band is 7.7 +- 1.0 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/981957/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2020
- Bibcode:
- 2020GCN.28084....1S