{
  "circularId": 44200,
  "subject": "GRB 260402B: GECAM-B observation",
  "eventId": "GRB 260402B",
  "submittedHow": "web",
  "format": "text/plain",
  "bibcode": "2026GCN.44200....1Z",
  "createdOn": 1775206416763,
  "body": "Jin-Peng Zhang, Chen-Wei Wang, Shao-Lin Xiong (IHEP) report on behalf of GECAM team:\n\nGECAM-B ground search was triggered by GRB 260402B, at 2026-04-02T22:57:17.100 UTC (denoted as T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #44193).\n\nAccording to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of one pulse, with a duration (T90) of 2.0 +0.5/-1.0 s.\n\nThe GECAM-B light curve can be found here:\nhttps://www.bursthub.cn//admin/static/gecambgrb260402B.png\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission originally consists of two micro-satellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).",
  "submitter": "zhangjinpeng@ihep.ac.cn"
}