[vsnet-grb-info 18455] GRB 160908A: CALET Gamma-Ray Burst Monitor detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19903
SUBJECT: GRB 160908A: CALET Gamma-Ray Burst Monitor detection
DATE:    16/09/11 11:55:45 GMT
FROM:    Takanori Sakamoto at AGU  <tsakamoto at phys.aoyama.ac.jp>

T. Sakamoto, A. Yoshida, 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), 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 160908A (Konus-Wind trigger time on 05:17:01.127;
INTEGRAL-SPI/ACS trigger #7558) triggered the CALET Gamma-ray Burst Monitor
(CGBM) at 05:17:00.07 on 8 September 2016.  The burst signal was seen by
all CGBM instruments.  Please note that the trigger time reported on the GCN CALET
GBM Flight Lightcurve notice, 05:17:00.74 UT, was wrongly reported due to the real-time
pipeline issue.  The correct trigger time is 05:17:00.07 UT.

The light curve of the SGM shows four peaks.  The whole burst emission
starts at T-5 sec and ends at T+40 sec.  The four spikes peak at T+8 sec,
T+16 sec, T+26 sec and T+41 sec.  The T90 duration measured by the SGM data
is 36.2 +- 5.1 sec (40-1000 keV).

The light curve is available at

http://cgbm.calet.jp/cgbm_trigger/flight/1157347009/

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