[vsnet-grb-info 19390] GRB 170510A CALET Gamma-Ray Burst Monitor detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  21105
SUBJECT: GRB 170510A CALET Gamma-Ray Burst Monitor detection
DATE:    17/05/19 02:55:29 GMT
FROM:    Takanori Sakamoto at AGU  <tsakamoto at phys.aoyama.ac.jp>

A. Tezuka, A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama,
Y. Yamada, S. Matsukawa (AGU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),
I. Takahashi (IPMU), Y. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu,
T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU),
S. Ricciarini (U of Florence), A. V. Penacchioni, P. S. Marrocchesi (U of Siena)
and the CALET collaboration:

The long-duration GRB 170510A (Roberts et al., GCN Circ. 21085;
Bissaldi et al., GCN Circ. 21080; Svinkin et al. GCN Circ. 21090;
Sharma et al. GCN Circ. 21093; INTEGRAL SPI-ACS trigger #7841)
triggered the CALET Gamma-ray Burst Monitor (CGBM) at 05:12:23.19 on
10 May 2017.  The burst signal was seen by all CGBM instruments.

The light curve of the SGM shows multiple peaks.  The emission
starts from T+5 sec, peaks at T+25 sec and ends at T+35 sec.
The T90 duration measured by the SGM data is 24.9 +- 1.0 sec (40-1000 keV).

The light curve is available at

http://cgbm.calet.jp/cgbm_trigger/flight/1178427921/

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