GCN Circular 34123
Subject
GRB 230625B: CALET Gamma-Ray Burst Monitor detection
Date
2023-06-30T04:09:47Z (a year ago)
From
Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>
Y. Asaoka (ICRR), A. Yoshida, T. Sakamoto, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA),
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 230625B (Swift/BAT-GUANO Detection: Ronchini et al.,
GCN Circ. 34083; AstroSat CZTI detection: Navaneeth et al., GCN
Circ. 34119) triggered the CALET Gamma-ray Burst Monitor (CGBM)
at 07:28:45.62 UTC on 25 June 2023
(http://cgbm.calet.jp/cgbm_trigger/flight/1371713313/index.html).
The burst signal was seen by all CGBM detectors.
The burst light curve shows multi-peaked structure that starts
at T-2.0 sec. The whole episode was not seen by CGBM because
the sequence of the HV turn-off started from T+220 sec.
The ground-processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1371713313/
The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at Waseda University.