TITLE:   GCN CIRCULAR
NUMBER:  32272
SUBJECT: GRB 220624A: CALET Gamma-Ray Burst Monitor detection
DATE:    22/06/27 03:03:19 GMT
FROM:    Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>

Y. Akaike (Waseda U), A. Yoshida, T. Sakamoto, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),
Y. Asaoka (ICRR), S. Torii, 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 220624A (Fermi GBM Final Real-time Localization: Fermi GBM team,
GCN Circ. 32256; AGILE detection: Ursi et al., GCN Circ. 32259; AGILE/GRID analysis:
Verrecchia et al., GCN Circ: 32261; Swift/BAT-GUANO detection: Tohuvavohu et al., 
GCN Circ. 32263; IPN triangulation: Kozyrev et al., GCN Circ. 32265; Fermi-GBM 
Detection: Lesage et al., GCN Circ. 32269) triggered the CALET Gamma-ray Burst 
Monitor (CGBM) at 02:58:32.538 UTC on 24 June 2022
(http://cgbm.calet.jp/cgbm_trigger/flight/1340074490/index.html).
The burst signal was seen by all CGBM detectors.

The burst light curve shows a multi-peaked structure which starts at T+2.5 sec.
The whole episode was not seen by CGBM because the sequence of the HV
turn-off started from T+20 sec.

The ground processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1340074490/

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