[vsnet-grb-info 25014] GRB 200215A: CALET Gamma-Ray Burst Monitor detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27113
SUBJECT: GRB 200215A: CALET Gamma-Ray Burst Monitor detection
DATE:    20/02/17 09:01:26 GMT
FROM:    Valentin Pal'shin at AGU  <val at phys.aoyama.ac.jp>

T. Sakamoto, A. Yoshida, V. Pal'shin, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),
Y. Asaoka, S. Torii (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 200215A (Swift detection: Bernardini et al., GCN Circ. 27079,
Barthelmy et al., GCN Circ. 27098; Fermi GBM detection: Poolakkil and
Meegan, GCN Circ. 27087) triggered the CALET Gamma-ray Burst Monitor
(CGBM) at 14:39:28.087 UTC on 15 February 2020.
The burst signal was seen by all CGBM detectors.

The burst light curve shows a multi-peaked structure which starts
at T+0.1 sec, peaks at T+4.0 sec and ends at T+8.3 sec.
The T90 and T50 durations measured by the SGM data are 7.1 +- 1.6 sec
and 2.2 +- 1.5 sec (40-1000 keV), respectively.

The ground processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1265812510/

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