{
  "eventId": "GRB 260510C",
  "createdOn": 1778829800826,
  "bibcode": "2026GCN.44616....1S",
  "body": "T. Sakamoto, A. Yoshida, S. Sugita, Y. Kawakubo (AGU),\nK. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii,\nY. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),\nN. Cannady (GSFC), M. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe CALET Gamma-ray Burst Monitor (CGBM) detected GRB 260510C \n(Fermi GBM Final Real-time Localization: Fermi GBM team, GCN #44520; \nSVOM detection of a burst: Gotz et al., GCN #44521; MAXI/GSC detection:\nIwakiri et al., GCN #44526; AstroSat CZTI detection: Arya et al., GCN #44544;\nFermi GBM Observation: Palafox et al., GCN #44564) at 17:15:37.60 UTC on 10 May 2026\n(https://cgbm.calet.jp/cgbm_trigger/flight/1462468483/index.html).\n\nThe burst signal was seen by all CGBM detectors. The onboard CGBM trigger\ncorresponds to the second peak of the double-peaked structure reported by\nFermi/GBM and SVOM/ECLAIRs. In the CGBM ground analysis, the first peak was also\nmarginally visible in the SGM data. The second peak started at T+0.3 s,\npeaked at T+2.9 s, and ended at T+8.9 s. The T90 and T50 durations of the\nsecond peak, measured with the SGM data, are 7.4 +/- 0.8 s and 3.2 +/- 0.8 s\nin the 40-1000 keV band, respectively.\n\nThe ground-processed light curve is available at\n\nhttps://cgbm.calet.jp/cgbm_trigger/ground/1462468483/\n\nThe CALET data used in this analysis were provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "circularId": 44616,
  "submittedHow": "web",
  "format": "text/plain",
  "subject": "GRB 260510C: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Yuta Kawakubo at Aoyama Gakuin University <kawakubo@phys.aoyama.ac.jp>"
}