{
  "subject": "GRB 251025C: CALET Gamma-Ray Burst Monitor detection",
  "submittedHow": "web",
  "circularId": 42467,
  "format": "text/plain",
  "bibcode": "2025GCN.42467....1T",
  "createdOn": 1761544195218,
  "submitter": "Yuta Kawakubo at Aoyama Gakuin University <kawakubo@phys.aoyama.ac.jp>",
  "body": "S. Torii (Waseda U), A. Yoshida, T. Sakamoto, S. Sugita, Y. Kawakubo (AGU),\nK. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), \nY. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),\nN. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 251025C (Fermi GBM Final Real-time Localization: Fermi GBM team,\nGCN Circ. 42449) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 23:08:37.27 \nUTC on 25 October 2025\n(https://cgbm.calet.jp/cgbm_trigger/flight/1445468431/index.html).\nThe burst signal was seen by all CGBM detectors.  \n\nThe burst light curve shows a multi-peaked structure that starts\nat T+2.9 sec, peaks at T+3.5 sec, and ends at T+46.7 sec.\nThe T90 and T50 durations measured by the SGM data are 38.6 +/- 2.6 sec\nand 15.1 +/- 1.4 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttps://cgbm.calet.jp/cgbm_trigger/ground/1445468431/\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "eventId": "GRB 251025C"
}