GCN Circular 38129
Subject
GRB 241104A: CALET Gamma-Ray Burst Monitor detection
Event
Date
2024-11-08T15:27:54Z (a year ago)
From
Yuta Kawakubo at Aoyama Gakuin University <kawakubo@phys.aoyama.ac.jp>
Via
Web form
T. Tamura (Kanagawa U), 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 (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 241104A (Fermi GBM Final Real-time Localization:
Fermi GBM team, GCN Circ. 38075; Detection and localization by
SVOM/ECLAIRs: Schanne et al., GCN Circ. 38078; EP detection of GRB 241104A
X-ray emission: Zhou et al., GCN Circ. 38081; SVOM/GRM observation: Zhang
et al., GCN Circ. 38082) triggered the CALET Gamma-ray Burst Monitor (CGBM)
at 18:30:15.957 UTC on 04 November 2024
(https://cgbm.calet.jp/cgbm_trigger/flight/1414780091/index.html).
The burst signal was seen by only the SGM detector. 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 multi-peaked structure that starts
at T-0.6 sec, peaks at T+2.6 sec, and ends at T+5.1 sec.
The T90 and T50 durations measured by the SGM data are 5.0 +/- 0.4 sec
and 3.3 +/- 0.5 sec (40-1000 keV), respectively.
The ground-processed light curve is available at
https://cgbm.calet.jp/cgbm_trigger/ground/1414780091/
The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at Waseda University.