TITLE:   GCN CIRCULAR
NUMBER:  24552
SUBJECT: GRB 190510A: CALET Gamma-Ray Burst Monitor detection
DATE:    19/05/15 14:11:57 GMT
FROM:    Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>

V. Pal'shin, A. Yoshida, T. Sakamoto, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U),
S. Nakahira (RIKEN),  Y. Asaoka, S. Ozawa,
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 short GRB 190510A (Fermi GBM Final Real-time Localization: The Fermi
GBM team, GCN Circ. 24449; IPN triangulation: Kozlova et al.,
GCN Circ. 24497; Konus-Wind observation: Kozlova et al., GCN Circ. 24533)
triggered the CALET Gamma-ray Burst Monitor (CGBM) at 10:19:15.735 UTC
on 10 May 2019. The burst signal was seen mainly by the SGM detector.

The burst light curve shows a single multi-peaked pulse which starts at
T+0.29 sec and ends at T+0.90 sec. The T90 and T50 durations measured by
the SGM data are 0.54 +- 0.09 sec and 0.29 +- 0.07 sec (40-1000 keV),
respectively.

The ground processed light curve is available at

http://cgbm.calet.jp/cgbm_trigger/ground/1241518706/

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