GCN Circular 35639
Subject
GRB 240125A: CALET Gamma-Ray Burst Monitor detection
Date
2024-01-27T00:35:22Z (3 months ago)
From
Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>
Via
Web form
P. S. Marrocchesi (U of Siena), A. Yoshida, T. Sakamoto,
S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U),
S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, Y. Akaike,
K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),
N. Cannady (GSFC/UMBC), M. L. Cherry (LSU),
S. Ricciarini (U of Florence),
and the CALET collaboration:
The short GRB 240125A (Glowbug gamma-ray detection:
Cheung et al., GCN Circ. 35630; AstroSat CZTI detection:
Joshi et al., GCN Circ. 35637) triggered the CALET Gamma-ray
Burst Monitor (CGBM) at 09:34:58.79 UTC on 25 January 2024
(http://cgbm.calet.jp/cgbm_trigger/flight/1390210300/).
The burst signal was seen by all CGBM detectors.
The burst light curve shows a triple-peaked structure that
starts at T+0.50 sec, peaks at T+1.02 sec, and ends at T+1.65 sec.
The T90 and T50 durations measured by the SGM data are
1.10 +/- 0.05 sec and 0.65 +/- 0.11 sec (40-1000 keV), respectively.
The ground-processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1390210300/index.html
The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at Waseda University.