//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 22373 SUBJECT: GRB 180126A CALET Gamma-Ray Burst Monitor detection DATE: 18/01/29 21:18:24 GMT FROM: Takanori Sakamoto at AGU T. Tamura (Kanagawa 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, S. Torii (Waseda U), Y. Shimizu (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 180126A (Fermi-GBM trigger #538625796; INTEGRAL SPI-ACS trigger #8000; Konus-Wind trigger time on 02:16:30.33) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 02:16:29.19 UTC on 26 January 2018. The burst signal was seen by all CGBM detectors. The light curve shows a single pulse which starts at T+2 sec, peaks at T+7 sec and ends at T+10 sec. The T90 and the T50 durations measured by the SGM data are 6.3 s +- 1.2 sec and 2.6 s +- 0.5 sec (40-1000 keV), respectively. The ground processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1200967960/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.