GCN Circular 38439
Subject
GRB 241130A: CALET Gamma-Ray Burst Monitor detection
Event
Date
2024-12-04T13:47:11Z (a year ago)
From
Yuta Kawakubo at Aoyama Gakuin University <kawakubo@phys.aoyama.ac.jp>
Via
Web form
S. Ricciarini (U of Florence), A. Yoshida, T. Sakamoto, S. Sugita,
Y. Kawakubo (AGU), 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), P. S. Marrocchesi (U of Siena),
and the CALET collaboration:
The long GRB 241130A (Fermi GBM Final Real-time Localization:
Fermi GBM team, GCN Circ. 38405; Fermi GBM Detection: Sharma
et al., GCN Circ. 38421; EIRSAT-1 GMOD Detection: McDermott et al.,
GCN Circ. 38423; IPN triangulation: Ridnaia et al., GCN Circ. 38424;
Konus-Wind detection: Frederiks et al., GCN Circ. 38429) triggered the
CALET Gamma-ray Burst Monitor (CGBM) at 23:13:45.911 UTC on 30 November 2024
(https://cgbm.calet.jp/cgbm_trigger/flight/1417043611/index.html).
The burst signal was seen by all CGBM detectors. Because of a problem
with the ground alert processing script, the GCN notice was not distributed
automatically for this event.
The burst light curve shows a single pulse that starts
at T-0.4 sec, peaks at T+0.1 sec, and ends at T+5.9 sec.
The T90 and T50 durations measured by the SGM data are 5.4 +/- 0.8 sec
and 2.4 +/- 0.5 sec (40-1000 keV), respectively.
The ground-processed light curve is available at
https://cgbm.calet.jp/cgbm_trigger/ground/1417043611
The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at Waseda University.