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GCN Circular 35176

Subject
GRB 231124A: CALET Gamma-Ray Burst Monitor detection
Date
2023-11-24T14:01:20Z (3 months ago)
From
Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>
Via
Web form
S. Torii (Waseda U), A. Yoshida, T. Sakamoto, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA),
Y. Asaoka (ICRR), 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),
P. S. Marrocchesi (U of Siena),
and the CALET collaboration:

The long GRB 231124A (Fermi GBM Final Real-time Localization: 
Fermi GBM team, GCN Circ. 35174) triggered the CALET Gamma-ray
Burst Monitor (CGBM) at 08:38:12.68 UTC on 24 November 2023
(http://cgbm.calet.jp/cgbm_trigger/flight/1384850206/).
The burst signal was seen by all CGBM detectors.

The burst light curve shows a multi-peaked structure that starts
at T-0.2 sec, peaks at T+10.9 sec, and ends at T+17.9 sec.
The T90 and T50 durations measured by the SGM data are 
16.7 +/- 1.0 sec and 7.1 +/- 1.1 sec (40-1000 keV), respectively.

The ground-processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1384850206/

The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at Waseda University.
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