{
  "submittedHow": "web",
  "format": "text/plain",
  "createdOn": 1717556586599,
  "subject": "GRB 240604A: GECAM detection of a long burst",
  "circularId": 36614,
  "submitter": "yqzhang_cl@163.com",
  "bibcode": "2024GCN.36614....1Z",
  "eventId": "GRB 240604A",
  "body": "Yan-Qiu Zhang, Shao-Lin Xiong report on behalf of the GECAM team:\n\nGECAM-B was triggered in-flight by a long burst, GRB 240604A, at 2024-06-04T22:28:29.050 UTC (T0), which was also detected by INTEGRAL/SPI-ACS (trigger #10730).\n\nAccording to the realtime alert data of GECAM-B, the GECAM-B light curve shows a long pulse with a duration of ~50 sec (15-1020 keV). The time-averaged spectrum from T0-1 to T0+16 s could be adequately fit by a power law with high energy exponential cutoff function with a fluence of about 7.04E-6 erg/cm^2 in 20-1000 keV.\n\nThe GECAM light curve could be found here:\nhttps://twikinew.ihep.ac.cn/pubgecam/Sandbox/GRB/gecam-b_lc_grd_all_combine_171239309.png\n\nThe GECAM-B in-flight location (J2000) is: \nRa: 286.8 deg   \nDec: 79.5 deg\nErr: 3.7 deg (1-sigma, statistical only)\n\nThe GECAM preliminary location could be found here: \nhttps://twikinew.ihep.ac.cn/pubgecam/Sandbox/GRB/gecam-b_skymap_flt_171239309.png\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 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)."
}