TITLE:   GCN CIRCULAR
NUMBER:  33199
SUBJECT: GRB 230119A: CALET Gamma-Ray Burst Monitor detection
DATE:    23/01/20 12:20:10 GMT
FROM:    Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>

S. Nakahira (RIKEN), A. Yoshida, T. Sakamoto, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), 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 230119A (Fermi GBM Final Real-time Localization: 
Fermi GBM team, GCN Circ. 33197) triggered the CALET 
Gamma-ray Burst Monitor (CGBM) at 13:23:33.64 UTC on 19 Jan 2023
(http://cgbm.calet.jp/cgbm_trigger/flight/1358169750/).
The burst signal was seen by all CGBM detectors.

The burst light curve shows a multi-peaked structure that starts
at T-0.4 sec, peaks at T+3.0 sec, and ends at T+91.0 sec.
The T90 and T50 durations measured by the SGM data are 79.6 +/- 4.6 sec
and 45.4 +/- 1.2 sec (40-1000 keV), respectively.

The ground-processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1358169750/index.html

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