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GCN Circular 24575

GRB 190515A: CALET Gamma-Ray Burst Monitor detection
2019-05-17T10:26:34Z (5 years ago)
Valentin Pal'shin at AGU <>
S. Sugita, A. Yoshida, T. Sakamoto, V. Pal'shin(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 hard GRB 190515A (Fermi-LAT detection: Kocevski et al.,
GCN Circ. 24560; Fermi GBM detection: Roberts, GCN Circ. 24562)
triggered the CALET Gamma-ray Burst Monitor (CGBM) at 04:33:03.330 UTC
on 15 May 2019. The burst signal was seen by all CGBM detectors.

The burst light curve shows a single pulse which starts at T+0 sec,
peaks at T+0.19 sec and ends at T+0.45 sec. The T90 and T50 durations
measured by the SGM data are 0.38 +- 0.14 sec and
0.19 +- 0.06 sec (40-1000 keV), respectively.

The ground processed light curve is available at

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