{
  "bibcode": "2020GCN.27797....1F",
  "body": "F. Fana Dirirsa (Univ. of Johannesburg), M. Axelsson (KTH & Stockholm\nUniv.), M. Ohno (Hiroshima Univ.), F. Piron (CNRS/IN2P3/LUPM) and F. Longo\n(University and INFN, Trieste) report on behalf of the Fermi-LAT\nCollaboration:\n\nOn May 24, 2020, Fermi-LAT detected high-energy emission from\nGRB 200524A, which was also detected by Fermi-GBM (trigger 611989445).\n\nAt the time of the trigger (T0 = 05:04:00.36 UT) Fermi-LAT was passing\nthrough the SAA, and observations started at roughly\nT0+110 seconds. The GRB is detected at high energy (>100 MeV) by Fermi-LAT\nat a location of:\n\nRA, Dec = 212.8, 61.0 (degrees, J2000) with an error radius of 0.2 deg (90%\ncontainment, statistical error only).\n\nThis was ~25 deg from the LAT boresight when observations started\n(T0+110s), and is ~3 deg from the GBM final ground position.\n\nThe photon flux above 100 MeV in the time interval 110-900 s after the GBM\ntrigger is 2.2e-06 +/- 0.8e-06 ph/cm2/s. The estimated photon index above\n100 MeV is -1.7 +/ - 0.2. The highest-energy photon is a 9.2 GeV event\nwhich is observed 748 seconds after the GBM trigger. After ~T0+900s, the\nGRB location moved outside the LAT FoV.\n\nA Swift ToO has been approved for this burst.\n\nThe Fermi-LAT point of contact for this burst is\nFeraol Fana Dirirsa (fdirirsa@uj.ac.za ).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover\nthe energy band from 20 MeV to greater than 300 GeV.\nIt is the product of an international collaboration between\nNASA and DOE in the U.S. and many scientific institutions\nacross France, Italy, Japan and Sweden.",
  "circularId": 27797,
  "createdOn": 1590331752000,
  "email": "ohno@astro.hiroshima-u.ac.jp",
  "subject": "GRB 200524A: Fermi-LAT detection",
  "submitter": "Masanori Ohno at Hiroshima University  <ohno@astro.hiroshima-u.ac.jp>",
  "eventId": "GRB 200524A"
}