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GCN Circular 32124

Subject
GRB 220523B: CALET Gamma-Ray Burst Monitor detection
Date
2022-05-26T14:42:39Z (2 years ago)
From
Yuta Kawakubo at Louisiana State U./CALET <kawakubo1@lsu.edu>
S. Sugita, A. Yoshida, T. Sakamoto(AGU), Y. Kawakubo (LSU), 
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 long GRB 220523B (Fermi GBM Detection: Fermi GBM team,
GCN Circ. 32098) triggered the CALET Gamma-ray
Burst Monitor (CGBM) at 13:24:04.522 UTC on 23 May 2022
(http://cgbm.calet.jp/cgbm_trigger/flight/1337347281/index.html).
The burst signal was seen by all CGBM detectors.

The burst light curve shows a multi-peaked structure which starts
at T+3.1 sec, peaks at T+5.7 sec, and ends at T+10.1 sec.
The T90 and T50 durations measured by the SGM data are 5.9 +/- 0.5 sec
and 2.1 +/- 0.3 sec (40-1000 keV), respectively.

The ground processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1337347281/

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