GCN Circular 33901

Subject

GRB 230525A: CALET Gamma-Ray Burst Monitor detection

Date

2023-05-31T06:20:08Z (6 months ago)

From

Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>

Y. Kawakubo (LSU), A. Yoshida, T. Sakamoto, S. Sugita (AGU), 
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 short GRB 230525A (Fermi-GBM Final Localization: The 
Fermi GBM team, GCN Circ. 33877; Fermi-GBM detection: The Fermi 
GBM team, GCN Circ. 33879) was detected in the ground analysis of 
the CALET Gamma-ray Burst Monitor (CGBM) data around 
10:46:08.33 UTC on 25 May 2023 (referenced to GCN Circ 33879).
The burst signal was seen by all CGBM detectors.

The burst light curve shows a short pulse around the reference time. 
We are not able to obtain the duration because no event data is available 
for ground-detected events.

The ground-processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1369046781/

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