Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 21336

GRB 170708B CALET Gamma-Ray Burst Monitor detection
2017-07-14T01:02:13Z (7 years ago)
Takanori Sakamoto at AGU <>
Y. Shimizu (Kanagawa U), A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama,
Y. Yamada, A. Tezuka, S. Matsukawa (AGU), K. Yamaoka (Nagoya U),
S. Nakahira (RIKEN), I. Takahashi (IPMU), Y. Asaoka, S. Ozawa, S. Torii (Waseda U),
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 170708B (Konus-Wind trigger time on
20:37:00.639 UT) triggered the CALET Gamma-ray Burst Monitor (CGBM)
at 20:36:54.18 on 8 July 2017.  The burst signal was only seen by the SGM

The light curve of the SGM shows a single peak.  The emission starts at T+2 sec,
peaks at T+4 sec and ends at T+9 sec.  The T90 duration measured by the SGM
data is 5.6 +- 0.7 sec (40-1000 keV).

The 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.
Looking for U.S. government information and services? Visit