{
  "bibcode": "2019GCN.26240....1S",
  "body": "Y. Shimizu (Kanagawa U),\nA. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU),\nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),\nY. Asaoka, S. Torii (Waseda U), T. Tamura (Kanagawa U),\nN. Cannady (GSFC/UMBC), M. L. Cherry (LSU),\nS. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe short bright GRB 191031D (Swift detection: Ambrosi et al.,\nGCN Circ. 26112, Sakamoto et al., GCN Circ. 26133;\nFermi GBM detection: Mailyan and Meegan, GCN Circ. 26118;\nAGILE/MCAL observations: Ursi et al., GCN Circ. 26123;\nKonus-Wind observation: Frederiks et al., GCN Circ. 26126, 26149;\nAstroSat CZTI detection: Gaikwad et al., GCN Circ. 26129;\nhttps://gcn.gsfc.nasa.gov/other/191031D.gcn3)\ntriggered the CALET Gamma-ray Burst Monitor (CGBM) at 21:23:31.261 UTC\non 31 October 2019. The burst signal was seen by all CGBM detectors.\nNo real-time CGBM GCN notice was distributed about this trigger because\nthe real-time communication from the ISS was off (loss of signal).\n\nThe burst light curve shows a multi-peak structure which starts at T-0.168\nsec, peaks at 0.008 sec and ends at T+0.192 sec. The T90 and T50 durations\nmeasured by the SGM data are 0.240 +- 0.079 sec and 0.104 +- 0.008 sec\n(40-1000 keV), respectively.\n\nThe ground processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1256592147/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at the Waseda University.",
  "circularId": 26240,
  "createdOn": 1573616349000,
  "email": "val@phys.aoyama.ac.jp",
  "subject": "GRB 191031D: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>",
  "eventId": "GRB 191031D"
}