[vsnet-grb-info 19014] GRB 170124A: CALET Gamma-Ray Burst Monitor detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20556
SUBJECT: GRB 170124A: CALET Gamma-Ray Burst Monitor detection
DATE:    17/01/28 04:30:56 GMT
FROM:    Takanori Sakamoto at AGU  <tsakamoto at phys.aoyama.ac.jp>

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

The long-duration GRB 170124A (Fermi-GBM trigger #506984291; Konus-Wind trigger
time on 20:58:06.428 UT) triggered the CALET Gamma-ray Burst Monitor (CGBM) at
20:58:04.58 on 24 January 2017.  The burst signal was seen by all CGBM instruments.

The light curve of the SGM shows two peaks.  The first peak starts at T0,
peaks at T+8 sec and ends at T+15 sec.  The second peak starts at T+15 sec,
peaks at T+23 sec and ends at T+30 sec.  The T90 duration measured by
the SGM data is 20.9 +- 1.3 sec (40-1000 keV).

The light curve is available at

http://cgbm.calet.jp/cgbm_trigger/flight//1169326441/index.html

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