{
  "subject": "GRB 260829A: GECAM-B observation of a long burst",
  "format": "text/plain",
  "body": "\nXue-Yuan Zao, Chen-Wei Wang, Shao-Lin Xiong (IHEP) report on behalf of GECAM team:\n\nGECAM-B was triggered on-ground by GRB 260829A, at 2026-08-29T06:08:10.450 UTC, which is also detected by Fermi/GBM (Fermi GBM team, GCN #45464, GCN #45465 and GCN #45467).\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 47.0 +/-4.0 s.\n\nThe GECAM-B light curve can be found here:\nhttps://www.bursthub.cn/gcn/2026/gecambgrb260829A.png\n\nThe time-averaged spectrum from T0+16.0 to T0+32.0 s is best fitted by a power law function with an exponential high-energy cutoff. The power law index is -1.15 +0.18/-0.15 and the cutoff energy, parameterized as Epeak, is 466 +138/-94 keV. The event fluence (10-1000 keV) in this time interval is (2.31 +0.13/-0.16) E-05 erg/cm^2.\n\nThe localization of GRB 260829A in the 'Amati' relation diagram is shown at: \nhttps://www.bursthub.cn/gcn/2026/gecambgrb260829A_amati.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",
  "createdOn": 1788104683387,
  "circularId": 45470,
  "eventType": [
    "GRB",
    "Gamma-ray Transient"
  ],
  "submittedHow": "web",
  "eventId": "GRB 260829A",
  "submitter": "xueyuan zao <zaoxueyuan@gmail.com>"
}