GRB 230506C: 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 230506C (trigger #1167288) (Tohuvavohu et al., GCN Circ. 33731). The BAT ground-calculated position is RA, Dec = 134.371, 45.131 deg which is RA(J2000) = 08h 57m 29.1s Dec(J2000) = +45d 07' 50.7" with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 46%. The mask-weighted light curve shows a multi-peaked structure that starts at ~T-9 s and ends at ~T+28 s. The main peak occurs at ~T+1 s. T90 (15-350 keV) is 31.00 +- 6.32 sec (estimated error including systematics). The time-averaged spectrum from T-8.59 to T+28.41 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.89 +- 0.17. The fluence in the 15-150 keV band is 1.7 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.41 sec in the 15-150 keV band is 2.4 +- 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/1167288/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- May 2023
- Bibcode:
- 2023GCN.33743....1K