{
  "bibcode": "2020GCN.27663....1R",
  "body": "S. Ricciarini (U of Florence),\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), Y. Shimizu, T. Tamura (Kanagawa U),\nN. Cannady (GSFC/UMBC), M. L. Cherry (LSU),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe CALET Gamma-ray Burst Monitor (CGBM) has been observing\nhigh bursting activity of SGR 1935+2154 since the CGBM trigger\nat ~18:32 UTC on 27 April 2020.\nNo real-time CGBM GCN notice was distributed about this trigger because\nthe real-time communication from the ISS was off (loss of signal).\nThis trigger followed the Swift and Fermi-GBM triggers on bursts\nfrom SGR 1935+2154 at ~18:20 UTC reported in GCNs 27657, 27659, and 27660\n(at this time CGBM HV was off).\nThe CGBM data display a burst cluster along with multiple\nshort bright bursts.\n\nThe first CGBM trigger was shortly followed by another CGBM trigger at\n18:46:08.675 UTC (trigger 1272047979:\nhttp://cgbm.calet.jp/cgbm_trigger/flight/1272047979/index.html)\nwith several intense bursts.\n\nAdditional two unalerted CGBM triggers with multiple short intense soft\nbursts were detected at ~20:15 UTC and ~21:49 UTC on 2020-04-27.\nAfter this, CGBM on-board trigger was disabled because it reached the\nmaximum numbers of the accepted triggers.\n\nFurther episodes of SGR activity were observed in CGBM TH data at\n~23:18 UTC on 2020-04-27 and at ~00:43 - 00:57 UTC on 2020-04-28.\n\nTotally several tens of short bright SGR bursts have been detected by CGBM\nso far. So, SGR 1935+2154 did enter a new phase of activity\nas was suggested in GCN 27623.",
  "circularId": 27663,
  "createdOn": 1588056335000,
  "email": "val@phys.aoyama.ac.jp",
  "subject": "high bursting activity of SGR 1935+2154: CGBM observations",
  "submitter": "Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>",
  "eventId": "SGR 1935+2154"
}