{
  "bibcode": "2020GCN.27623....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, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),\nN. Cannady (GSFC/UMBC), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nAt 08:53:17.656 UTC on 22 April 2020, the CALET Gamma-ray Burst Monitor\n(CGBM) triggered on a very bright SGR-like burst (trigger 1271580418:\nhttp://cgbm.calet.jp/cgbm_trigger/flight/1271580418/index.html).\nThe burst signal was seen by all CGBM detectors.\n\nThis burst is also clearly seen by the publicly available\nINTEGRAL SPI-ACS light curve.\n\nThe CGBM light curve shows a bright pulse with a duration of about 0.6 sec.\nThe emission is seen up to ~170 keV.\n\nThe estimated time delay between CGBM and INTEGRAL-SPI-ACS is consistent\nwith the expected propagation time delay for the position of SGR 1935+2154,\nfrom which a bright burst has been recently observed\n(Svinkin et al., GCN Circ. 27527, Veres et al., GCN Circ. 27531,\nRidnaia et al., GCN Circ. 27554).\nAt the trigger time, this SGR was above the horizon and in the FOVs of\nthe CGBM detectors. At the same time, it was below the horizon for Fermi\nand above the horizon, but outside the coded FOV of Swift-BAT,\nthat is consistent with the non-triggering by these facilities.\n\nHence, we conclude that this bright burst is likely originated from\nSGR 1935+2154 which may be entering a new active phase.\n\nThe results of the further analysis will be reported upon arrival of\nthe burst event data.\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at the Waseda University.",
  "circularId": 27623,
  "createdOn": 1587567431000,
  "email": "val@phys.aoyama.ac.jp",
  "subject": "bright SGR burst detected by CALET Gamma-Ray Burst Monitor",
  "submitter": "Valentin Pal'shin at AGU  <val@phys.aoyama.ac.jp>"
}