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GCN Circular 35020

GRB 231110A: CALET Gamma-Ray Burst Monitor detection
2023-11-14T03:07:36Z (6 months ago)
Yuta Kawakubo at Louisiana State University <>
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S. Sugita, A. Yoshida, T. Sakamoto (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),
P. S. Marrocchesi (U of Siena),
and the CALET collaboration:

The long GRB 231110A (Swift detection: D'Elia et al., GCN Circ. 34977;
GECAM-B detection: Wang et al., GCN Circ. 34992; AstroSat CZTI 
detection: Navaneeth et al., GCN Circ. 35005; Glowbug gamma-ray 
detection: Cheung et al., GCN Circ. 35006; Swift-BAT refined analysis:
Laha et al., GCN Circ. 35015) triggered the CALET Gamma-ray Burst
Monitor (CGBM) at 21:19:35.19 UTC on 10 November 2023
The burst signal was seen by all CGBM detectors.  No real-time 
CGBM GCN notice was distributed about this trigger because
the real-time communication from the ISS was off (loss of signal).

The burst light curve shows a single pulse that starts
at T-1.0 sec, peaks at T+0.5 sec, and ends at T+1.5 sec.
The T90 and T50 durations measured by the SGM data are 2.1 +/- 0.2 sec
and 1.1 +/- 0.1 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.
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