GRB 220711B: CALET Gamma-Ray Burst Monitor detection

The long GRB 220711B (Fermi GBM Final Real-time Localization: Fermi GBM team, GCN Circ. 32365; Fermi GBM Detection: Lesage et al., GCN Circ 32369; Swift detection: D'Ai et al., GCN Circ 32366, Swift-BAT refined analysis: Krimm et al., GCN Circ 32374) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 18:16:31.192 UTC on 11 July 2022 (http://cgbm.calet.jp/cgbm_trigger/flight/1341598587/index.html). The burst signal was seen by all CGBM detectors. 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 light curve shows a multi-peaked structure which starts at T-39.5 sec, peaks at T-2.4 sec, and ends at T+93.7 sec. The T90 and T50 durations measured by the SGM data are 82.7 +/- 3.8 sec and 15.7 +/- 4.0 sec (40-1000 keV), respectively. The ground processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1341598587/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.