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 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.