TITLE:   GCN CIRCULAR
NUMBER:  32981
SUBJECT: GRB 221124A: CALET Gamma-Ray Burst Monitor detection
DATE:    22/11/25 03:33:01 GMT
FROM:    Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>

S. Sugita, A. Yoshida, T. Sakamoto (AGU), Y. Kawakubo (LSU), 
K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), 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),
P. S. Marrocchesi (U of Siena),
and the CALET collaboration:

The long GRB 221124A (GECAM Trigger #79; IPN RAW Notice at
02:00:24.17 on 24 November) triggered the CALET Gamma-ray Burst
Monitor (CGBM) at 02:00:24.88 UTC on 24 November 2022
(http://cgbm.calet.jp/cgbm_trigger/flight/1353290389/index.html).
The burst signal was seen by all CGBM detectors.

The burst light curve shows a multi-peaked structure that starts 
at T-58 sec and ends at T+~350 sec. We are not able to obtain 
the duration because of the scheduled HV turn-off started just 
after the end of the emission. 

The ground-processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1353290389/

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