Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 35639

GRB 240125A: CALET Gamma-Ray Burst Monitor detection
2024-01-27T00:35:22Z (3 months ago)
Yuta Kawakubo at Louisiana State University <>
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
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

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

Looking for U.S. government information and services? Visit