{
  "bibcode": "2023GCN.33423....1K",
  "body": "K. Kobayashi (Waseda U), A. Yoshida, T. Sakamoto, 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), 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 230304B (Fermi GBM Final Real-time Localization: Fermi GBM team,\nGCN Circ. 33396; AstroSat CZTI detection:  Navaneeth et al., GCN Circ 33400) \ntriggered the CALET Gamma-ray Burst Monitor (CGBM) at 14:35:45.442 UTC\non 4 March 2023\n(http://cgbm.calet.jp/cgbm_trigger/flight/1361975601/index.html).\nThe burst signal was seen by only the SGM detector.\n\nThe burst light curve shows a multi-peaked structure that starts\nat T+3.6 sec, peaks at T+4.1 sec, and ends at T+19.3 sec.\nThe T90 and T50 durations measured by the SGM data are 14.4 +/- 0.3 sec\nand 9.5 +/- 0.3 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttp://cgbm.calet.jp/cgbm_trigger/ground/1361975601/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "circularId": 33423,
  "createdOn": 1678291633000,
  "email": "kawakubo1@lsu.edu",
  "subject": "GRB 230304B: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>",
  "eventId": "GRB 230304B"
}