TITLE:   GCN CIRCULAR
NUMBER:  27163
SUBJECT: GRB 200219C: CALET Gamma-Ray Burst Monitor detection
DATE:    20/02/21 15:33:14 GMT
FROM:    Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>

S. Sugita, A. Yoshida, T. Sakamoto, V. Pal'shin (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 200219C (Fermi GBM detection: Fermi GBM Team,
GCN Circ. 27145, Hamburg et al., GCN Circ. 27155;
Fermi-LAT detection: Dirirsa et al., GCN Circ. 27151;
https://gcn.gsfc.nasa.gov/other/200219C.gcn3)
triggered the CALET Gamma-ray Burst Monitor (CGBM) at 23:57:10.630 UTC
on 19 February 2020. The burst signal was seen by only the SGM detector.

The burst light curve shows a multi-peaked pulse which starts at T+0.1 sec,
peaks at T+1.6 sec and ends at T+4.6 sec. The T90 and T50 durations
measured by the SGM data are 4.0 +- 0.7 sec and 2.1 +- 0.9 sec (40-1000
keV), respectively.

The ground processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1266191565/

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