{
  "bibcode": "2026GCN.44217....1L",
  "createdOn": 1775374492382,
  "submitter": "Xinghao Luo at IHEP <2952704891@qq.com>",
  "editedOn": 1775742454541,
  "submittedHow": "web",
  "circularId": 44217,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Xinghao Luo at IHEP <2952704891@qq.com>",
  "version": 2,
  "body": "Xing-Hao Luo, Chen-Wei Wang, Shao-Lin Xiong (IHEP) report on behalf of GECAM team:\n\nGECAM-B was triggered in-flight by GRB 260403A, at 2026-04-03T02:31:29.500 UTC (denoted as T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #44195) and AstroSat CZTI (A. Goyal et.al., GCN#44202).\n\nAccording to the GECAM-B light curves in about 70-6000 keV, this burst mainly consists of a single pulse with a duration (T90) of  24.5 +3.0/-4.0 s.\n\nThe GECAM-B light curve can be found here:\nhttps://www.bursthub.cn//admin/static/gecambgrb260403A.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).\n",
  "subject": "GRB 260403A: GECAM-B observation of a long burst",
  "eventId": "GRB 260403A",
  "format": "text/plain"
}