TITLE: GCN CIRCULAR NUMBER: 23329 SUBJECT: GRB 181011A: CALET Gamma-Ray Burst Monitor detection DATE: 18/10/12 15:22:41 GMT FROM: Valentin Pal'shin at AGU P. S. Marrocchesi (U of Siena), A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita, Y. Kawakubo, A. Tezuka, S. Matsukawa, H. Onozawa, T. Ito, H. Morita, Y. Sone (AGU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), 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), A. V. Penacchioni and the CALET collaboration: The MAXI GRB 181011A (Kawakubo et al., GCN Circ. 23327) was detected in ground analysis of the CALET Gamma-ray Burst Monitor (CGBM) data near the MAXI trigger time at T0=03:36:12 UT on 11 October 2018. The burst signal was seen by all CGBM detectors. The burst light curve shows a single multi-peaked emission episode which starts at T+21 sec and ends at T+55 sec. The T90 and the T50 durations measured by the SGM data are 31 +- 8 sec and 15 +- 8 sec (40-1000 keV), respectively. The ground processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1223264170/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.