GRB 230816A: Swift-BAT refined analysis
Abstract
Using the data set from T-239 to T+303 sec from the recent telemetry downlink, we report further analysis of BAT GRB 230816A (trigger #1185673) (Siegel, et al., GCN Circ. 34450). The BAT ground-calculated position is RA, Dec = 328.453, 37.853 deg which is RA(J2000) = 21h 53m 48.8s Dec(J2000) = +37d 51' 12.1" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 98%. The mask weighted light curve shows a fast rise exponential decay type single peak. T90 (15-350 keV) is 20.48 +- 4.94 sec (estimated error including systematics). The time-averaged spectrum from T-5.60 to T+21.08 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.43 +- 0.14. The fluence in the 15-150 keV band is 7.7 +- 0.7 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+0.60 sec in the 15-150 keV band is 1.0 +- 0.1 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/1185673/BA/ <http://gcn.gsfc.nasa.gov/notices_s/1185673/BA/>
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2023
- Bibcode:
- 2023GCN.34474....1L