{
  "bibcode": "2021GCN.29268....1C",
  "body": "M. L. Cherry (LSU),\nA. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU),\nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),\nY. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nS. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long bright GRB 210104A (Swift detection: Troja et al.,\nGCN Circ. 29233, Palmer et al., GCN Circ. 29251;\nFermi GBM detection: Malacaria et al., GCN Circ. 29246;\nKonus-Wind detection: Frederiks et al., GCN Circ. 29258;\nhttps://gcn.gsfc.nasa.gov/other/210104A.gcn3) triggered the CALET\nGamma-ray Burst Monitor (CGBM) at 11:26:56.318 UTC on 4 January 2021\n(http://cgbm.calet.jp/cgbm_trigger/flight/1293794541/).\nThe burst signal was seen by all CGBM detectors.\n\nThe burst light curve shows multiple partially overlapped pulses which\nstart at T+2.5 sec and end at T+36.5 sec. The T90 and T50 durations\nmeasured by the SGM data are 31.2 +- 2.0 sec and 11.6 +- 9.4 sec\n(40-1000 keV), respectively.\n\nThe ground processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1293794541/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at the Waseda University.",
  "circularId": 29268,
  "createdOn": 1609928124000,
  "email": "val@phys.aoyama.ac.jp",
  "subject": "GRB 210104A: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>",
  "eventId": "GRB 210104A"
}