{
  "eventId": "GRB 260415B",
  "createdOn": 1776765076654,
  "circularId": 44371,
  "submittedHow": "web",
  "submitter": "Yuta Kawakubo at Aoyama Gakuin University <kawakubo@phys.aoyama.ac.jp>",
  "body": "P. S. Marrocchesi (U of Siena), A. Yoshida, T. Sakamoto, S. Sugita,\nY. Kawakubo (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), \nY. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu,\nT. Tamura (Kanagawa U), N. Cannady (GSFC), M. L. Cherry (LSU), \nS. Ricciarini (U of Florence),\nand the CALET collaboration:\n\nThe CALET Gamma-ray Burst Monitor (CGBM) detected GRB 260415B \n(Fermi GBM Final Real-time Localization: Fermi GBM team, GCN #44300; \nNuSTAR detection: Waratkar et al., GCN #44302; Glowbug gamma-ray \ndetection: Woolf et al., GCN #44313) at 02:28:55.55 UTC on 15 April 2026\n(https://cgbm.calet.jp/cgbm_trigger/flight/1460255329/index.html).\nThe burst signal was seen by all CGBM detectors.  \n\nThe burst light curve shows a multi-peaked structure starting\nat T-2.9 s, peaking at T+22.1 s, and ending at T+124.5 s.\nThe T90 and T50 durations measured with the SGM data are 111.6 +/- 1.8 s\nand 50.7 +/- 1.0 s (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\nhttps://cgbm.calet.jp/cgbm_trigger/ground/1460255329/\n\nThe CALET data used in this analysis were provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "format": "text/plain",
  "subject": "GRB 260415B: CALET Gamma-Ray Burst Monitor detection"
}