GRB 180526A: CALET Gamma-Ray Burst Monitor detection

The long, bright GRB 180526A (INTEGRAL SPI-ACS trigger #8067, Konus-Wind trigger time on 11:03:36.006, AstroSat CZTI detection: Sharma et al., GCN circ. 22742) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 11:03:36.200 UTC on 26 May 2018. No real-time CGBM GCN notice was distributed about this trigger because the real-time communication from the ISS was off (loss of signal). The burst signal was seen by all CGBM detectors. The burst light curve shows a multi-peaked structure which starts at T-2.2 sec, peaks at T+44.4 sec and ends at T+79.2 sec. The T90 and the T50 durations measured by the SGM data are 56.9 +- 2.8 sec and 16.3 +- 1.3 sec (40-1000 keV), respectively. The ground processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1211367794/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.