TITLE: GCN CIRCULAR NUMBER: 22359 SUBJECT: GRB 180113A CALET Gamma-Ray Burst Monitor detection DATE: 18/01/17 05:44:00 GMT FROM: Takanori Sakamoto at AGU S. Torii (Waseda U), A. Yoshida, T. Sakamoto, V. Pal'shin, 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 (Waseda U), Y. Shimizu, 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 180113A (Ukwatta et al., GCN circ. 22325; Veres et al., GCN circ. 22328; Frederiks et al., GCN circ. 22344) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 02:47:03.27 on 13 January 2018. The burst signal was seen by the all CGBM instruments. The light curve of the SGM shows two overlapping pulses. The emission starts at T+3 sec, peaks at T+4 sec and ends at T+16 sec. The T90 and the T50 durations measured by the SGM data are 11.3 +- 1.3 sec and 7.0 +- 0.6 sec (40-1000 keV), respectively. The ground processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1199846617 The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.