[vsnet-grb-info 18978] GRB 170115B: CALET Gamma-Ray Burst Monitor detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20483
SUBJECT: GRB 170115B: CALET Gamma-Ray Burst Monitor detection
DATE:    17/01/19 04:50:32 GMT
FROM:    Takanori Sakamoto at AGU  <tsakamoto at phys.aoyama.ac.jp>

Y. Shimizu (Kanagawa U), 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),
T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU),
S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena)
and the CALET collaboration:

The long-duration GRB 170115B (Hamburg et al., GCN Circ. 20463; McEnery et al.,
GCN Circ. 20464; Sharma et al., GCN Circ. 20466; Xiao et al., GCN Circ. 20469;
Verrecchia et al., GCN Circ. 20474; Frederiks et al., GCN Circ. 20476) triggered
the CALET Gamma-ray Burst Monitor (CGBM) at 17:49:12.63 on 15 January 2017.
The burst signal was only seen by the SGM instrument.

The light curve of the SGM shows several overlapping pulses starting at T0,
peaking at T+3 sec and ending at T+15 sec.  The T90 duration measured by
the SGM data is 12.0 +- 0.9 sec (40-1000 keV).

The light curve is available at

http://cgbm.calet.jp/cgbm_trigger/flight/1168537525/

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