{
  "format": "text/plain",
  "body": "E. Bissaldi (Politecnico and INFN Bari), A. Holzmann Airasca (UniTrento and INFN Bari) and T. Khalil (Johannesburg Univ) report on behalf of the Fermi-LAT team:\n\nAt 02:15:08 UT on May 22nd, 2026, Fermi-LAT detected high-energy emission from GRB 260522A, which was also detected by Fermi-GBM (trigger 801108913 / 260522094, GCN #44687).\n\nThe best LAT on-ground location is found to be\n\nRA, Dec = 346.67, 9.66 (J2000)\n\nwith an error radius of 0.55 deg (90 % containment, statistical error only).\n\nThis was 15 deg from the LAT boresight at the time of the trigger.\n\nThe data from the Fermi-LAT show a significant increase in the event rate that is spatially and temporally correlated with the trigger with high significance.\nThe photon flux above 100 MeV in the time interval 0 - 50 s after the GBM trigger is (2.89 ± 0.97)E-5 ph/cm2/s. The estimated photon index above 100 MeV is -2.14 ± 0.38. The highest-energy photon is a 820 MeV event, which is observed 1.3 seconds after the GBM trigger.\n\nThe Fermi-LAT point of contact for this burst is Elisabetta Bissaldi \n(elisabetta.bissaldi@ba.infn.it ).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.",
  "circularId": 44689,
  "editedOn": 1779460996308,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Elisabetta Bissaldi at Politecnico and INFN Bari <elisabetta.bissaldi@ba.infn.it>",
  "submittedHow": "web",
  "version": 2,
  "bibcode": "2026GCN.44689....1B",
  "subject": "GRB 260522A: Fermi-LAT detection",
  "eventId": "GRB 260522A",
  "createdOn": 1779438261908,
  "submitter": "Elisabetta Bissaldi at Politecnico and INFN Bari <elisabetta.bissaldi@ba.infn.it>"
}