GRB 230606A: 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 230606A (trigger #1173731) (Lien et al., GCN Circ. 33921). The BAT ground-calculated position is RA, Dec = 166.777, 36.504 deg which is RA(J2000) = 11h 07m 06.4s Dec(J2000) = +36d 30' 15.6" with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 15%. The mask-weighted light curve shows two distinct pulses. The first pulse starts at ~T0 and ends at ~T+4 s. The second pulse starts at ~T+14 s and ends at ~T+16 s. T90 (15-350 keV) is 16.26 +- 1.29 sec (estimated error including systematics). The time-averaged spectrum from T-0.26 to T+16.97 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.15 +- 0.30. The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.92 sec in the 15-150 keV band is 2.6 +- 0.6 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/1173731/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2023
- Bibcode:
- 2023GCN.33933....1L