{
  "circularId": 35689,
  "submittedHow": "web",
  "bibcode": "2024GCN.35689....1Z",
  "subject": "GRB 240205B: GECAM detection of a long burst ",
  "submitter": "wenlongzhang2018@163.com",
  "createdOn": 1707189130473,
  "eventId": "GRB 240205B",
  "body": "Wen-Long Zhang, Shao-Lin Xiong, Chen-Wei Wang report on behalf of the GECAM team:\n\nGECAM-B was triggered in-flight by a long burst, GRB 240205B, at 2024-02-05T22:13:08.400 UTC (T0), which was also detected by Fermi/GBM (GCN #35682), Swift/BAT (GCN #35683), INTEGRAL_SPIACS (trig# 10513) and CALET/GBM (trig# 1391206207). As the science data arrived, GECAM-B was also triggered on-ground by this burst with the automatic processing pipeline. \n\nAccording to the GECAM-B light curves, this burst shows multi-pulses with a total duration of ~50 sec. Interestingly, we note that there is a bright and narrow peak at T0+ 37.5 s.\n\nAccording to the in-flight software, GECAM-B localized this burst to the following position (J2000): \nRa: 344.14 deg   \t\nDec: -53.02 deg\nErr: 8.74 deg (1-sigma, statistical only)\nThis GECAM-B localization is consistent with that of Swift/BAT and Fermi/GBM within the error.\n\nWe note that these results are very preliminary. Refined analysis will be reported later.\n\nGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in December 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)."
}