{
  "bibcode": "2023GCN.34104....1N",
  "circularId": 34104,
  "eventId": "GRB 230623B",
  "subject": "GRB 230623B: CALET Gamma-Ray Burst Monitor detection",
  "body": "S. Nakahira (JAXA), A. Yoshida, T. Sakamoto, S. Sugita (AGU),\nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), Y. Asaoka (ICRR),\nS. Torii, Y. Akaike, K. Kobayashi (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC),\nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 230623B (GECAM trigger 195; Swift/BAT-GUANO \ndetection: Ronchini et al.,GCN Circ. 34076) triggered the CALET \nGamma-ray Burst Monitor (CGBM) at 21:22:37.02 UTC on 23 \nJune 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1371590547/index.html).\nThe burst signal was seen by all CGBM detectors.  No real-time \nCGBM 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-peaked structure that starts\nat T-3.2 sec, peaks at T+13.9 sec, and ends at T+20.4 sec.\nThe T90 and T50 durations measured by the SGM data are 21.4 +/- 1.5 sec\nand 13.4 +/- 0.6 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1371590547/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "createdOn": 1687970347741,
  "submitter": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>"
}