GRB 240101A: Swift-BAT refined analysis
Abstract
Using the data set from T-10 to T+242 sec from the recent telemetry downlink, we report further analysis of BAT GRB 240101A (trigger #1205708) (Cenko, et al., GCN Circ. 35448). The trigger time, which was unavailable in the first circular was 2024-01-01 at 14:20:17.331 UTC. The BAT ground-calculated position is RA, Dec = 10.289, 8.540 deg which is RA(J2000) = 00h 41m 09.5s Dec(J2000) = +08d 32' 25.3" with an uncertainty of 3.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 66%. The mask-weighted light curve shows a weak, complex structure lasting from About T-5 to T+10 seconds. T90 (15-350 keV) is 15.8 +- 6.1 sec (estimated error including systematics). The time-averaged spectrum from T-1.94 to T+20.28 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.03 +- 0.34. The fluence in the 15-150 keV band is 3.3 +- 0.7 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+2.11 sec in the 15-150 keV band is 0.9 +- 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/1205708/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- January 2024
- Bibcode:
- 2024GCN.35473....1L