{
  "bibcode": "2023GCN.34560....1S",
  "submitter": "Yuta Kawakubo at Louisiana State University <kawakubo1@lsu.edu>",
  "eventId": "GRB 230818B",
  "createdOn": 1693024514898,
  "subject": "GRB 230818B: CALET Gamma-Ray Burst Monitor detection",
  "submittedHow": "web",
  "body": "Y. Shimizu (Kanagawa U), A. Yoshida, T. Sakamoto, \nS. Sugita (AGU), Y. Kawakubo (LSU),K. Yamaoka (Nagoya U),\nS. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, Y. Akaike, \nK. Kobayashi (Waseda U), T. Tamura (Kanagawa U), \nN. 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 230818B (AstroSat CZTI detection: \nNavaneeth et al., GCN Circ. 34524; VZLUSAT-2 detection: \nDafcikova et al., GCN Circ. 34525; Konus/Wind detection at \n2023-08-18 10:12:54.913 UT) triggered the CALET Gamma-ray \nBurst Monitor (CGBM) at 10:12:54.02 UTC on 18 August 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1376388662/).\nThe burst signal was seen by all CGBM detectors.\nBecause of a problem in one of the ground alert processing script,\nthe GCN notice was not distributed automatically for this event.\n\nThe burst light curve shows a multi-peaked structure that starts\nat T-0.6 sec, peaks at T+0.6 sec, and ends at T+32.0 sec.\nThe T90 and T50 durations measured by the SGM data are 27.6 +/- 1.2 sec\nand 13.3 +/- 0.6 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1376388662/index.html\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.\n",
  "circularId": 34560
}