{
  "submittedHow": "web",
  "submitter": "tanwj@ihep.ac.cn",
  "bibcode": "2023GCN.35266....1T",
  "createdOn": 1701748131896,
  "subject": "GRB 231205A: GECAM-B detection of a short burst",
  "circularId": 35266,
  "body": "GRB 231205A: GECAM-B detection of a short burst\n\nWenjun Tan, Shaolin Xiong, report on behalf of the GECAM team:\n\nGECAM-B was triggered in-flight by a short burst, GRB 231205A\nat 2023-12-05T02:25:11.450 UTC(T0), which was also observed by \nFermi/GBM (Fermi/GBM team, GCN 35263).\n\nAccording to the realtime alert data of GECAM-B, this burst consists \nof one bright short pulse followed by weaker emission with a total \nduration (T90) of about ~0.3 sec (30-1020 keV).\n\nUsing the automatic on-ground localization pipeline with the realtime alert data, \nGECAM-B localized this burst to the following position (J2000): \nRa: 202.8 deg \nDec: 26.8 deg\nErr: 6.1 deg (1-sigma, statistical only)\nGECAM location is consistent with that of Fermi/GBM within the error.\n\nThe time-averaged spectrum of GECAM-B realtime data from about T0-0.05 s to T0 could be\nadequately fit by a cut-off power-law with a fluence about 1.10E-6 erg/cm^2 in 20-1000 keV. \n\nWe note that these results are based on realtime alert data and thus very preliminary. \n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor\n(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B)\nlaunched in Dec. 2020. As the third member of GECAM constellation, \nGECAM-C was launched onboard SATech-01 experimental satellite in July 2022. \nGECAM mission is funded by the Chinese Academy of Sciences (CAS).",
  "eventId": "GRB 231205A"
}