{
  "bibcode": "2018GCN.23553....1S",
  "body": "T. Sakamoto, A. Yoshida, V. Pal'shin, S. Sugita, Y. Kawakubo,\nA. Tezuka, S. Matsukawa, H. Onozawa, T. Ito, H. Morita, Y. Sone (AGU),\nK. Yamaoka (Nagoya U), S. Nakahira (RIKEN), I. Takahashi (IPMU),\nY. Asaoka, S. Ozawa, S. Torii (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U),\nW. Ishizaki (ICRR), M. L. Cherry (LSU),\nS. Ricciarini (U of Florence),\nA. V. Penacchioni, P. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 181222A (MAXI/GSC detection: Sakamaki et al., GCN Circ. 23547;\nFermi-GBM observation: Vere & Bissaldi, GCN Circ. 23548)\ntriggered the CALET Gamma-ray Burst Monitor (CGBM) at 06:41:33.811 UTC\non 22 December 2018. The burst signal was seen by all CGBM detectors.\nSince the burst incident direction was nearly perpendicular to\nthe HXM detector axes, the signal in these detectors was heavily attenuated.\n\nThe burst light curve shows two main emission episodes which start\nat T+1.5 sec and end at T+105.8 sec.\nThe T90 and the T50 durations measured by the SGM data are\n98.3 +- 5.3 sec and 44.6 +- 39.7 sec (40-1000 keV), respectively.\n\nThe ground processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1229496031/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at the Waseda University.",
  "circularId": 23553,
  "createdOn": 1545628435000,
  "email": "val@phys.aoyama.ac.jp",
  "subject": "GRB 181222A: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>",
  "eventId": "GRB 181222A"
}