GRB 230321A: CALET Gamma-Ray Burst Monitor detection
Abstract
The long GRB 230321A (Fermi GBM Final Real-time Localization: Fermi GBM team, GCN Circ. 33490; BALROG localization: Kunzweiler et al., GCN Circ 33491) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 04:21:42.09 UTC on 21 March 2023 (http://cgbm.calet.jp/cgbm_trigger/flight/1363407527/index.html). The burst signal was seen by all CGBM detectors. The burst light curve shows a multi-peaked structure that starts at T+1.0 sec, peaks at T+31.9 sec, and ends at T+86.6 sec. The T90 and T50 durations measured by the SGM data are 75.5 +/- 1.2 sec and 35.4 +/- 3.1 sec (40-1000 keV), respectively. The ground-processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1363407527/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at Waseda University.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- March 2023
- Bibcode:
- 2023GCN.33502....1C