{
  "bibcode": "2021GCN.31332....1C",
  "body": "N. Cannady (GSFC/UMBC),\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), M. L. Cherry (LSU),\nS. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 211225B (Swift detection and refined analysis: Page et al.,\nGCN Circ. 31305, Laha et al., GCN Circ. 31312;\nhttps://gcn.gsfc.nasa.gov/other/211225B.gcn3) triggered the CALET Gamma-ray\nBurst Monitor (CGBM) at 13:13:05.685 UTC on 25 December 2021 while exiting\nthe radiation belts. The burst signal was seen by all CGBM detectors.\nBecause of a problem in one of the ground alert processing script, the GCN\nnotice was not distributed automatically for this event.\n\nThe burst light curve shows a single pulse which starts at T-2.2 sec,\npeaks at T+3.6 sec and ends at T+42.0 sec. The extended tail is seen in\nthe low energy channels as long as a hint of the preceding emission (which\nis clearly seen in the Swift-BAT light curve: Laha et al. GCN Circ. 31312).\nThe T90 and T50 durations measured by the SGM data are 32.7 +- 8.1 sec and\n14.6 +- 1.9 sec (40-1000 keV), respectively.\n\nThe ground processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1324473176/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at the Waseda University.",
  "circularId": 31332,
  "createdOn": 1640761845000,
  "email": "val@phys.aoyama.ac.jp",
  "subject": "GRB 211225B: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>",
  "eventId": "GRB 211225B"
}