{
  "bibcode": "2018GCN.22438....1R",
  "body": "S. Ricciarini (U of Florence), A. Yoshida, T. Sakamoto, V. Pal'shin,\nY. Kawakubo, M. Moriyama, Y. Yamada, A. Tezuka, S. Matsukawa (AGU),\nK. Yamaoka (Nagoya U), S. Nakahira (RIKEN),\nI. Takahashi (IPMU), Y. Asaoka, S. Ozawa, S. Torii (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), W. Ishizaki (ICRR),\nM. L. Cherry (LSU), A. V. Penacchioni, P. S. Marrocchesi (U of Siena)\nand the CALET collaboration:\n\nThe long GRB 180221B (Konus-Wind trigger time on 12:30:00.79) triggered\nthe CALET Gamma-ray Burst Monitor (CGBM) at 12:29:59.616 UTC on\n21 February 2018.  The burst signal was seen by all CGBM detectors.\n\nThe burst light curve shows a multi-peaked structure which starts at T0,\npeaks at T0+16 sec and ends at T0+78 sec.  The T90 and the T50 durations\nmeasured by the SGM data are 66.6 +- 6.8 sec and 21.1 +- 6.3 sec\n(40-1000 keV), respectively.\n\nThe ground processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1203251126/\n\nThe CALET data used in this analysis are provided by the Waseda CALET\nOperation Center located at the Waseda University.",
  "circularId": 22438,
  "createdOn": 1519382737000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 180221B CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 180221B"
}