{
  "format": "text/plain",
  "bibcode": "2024GCN.38436....1B",
  "createdOn": 1733304379075,
  "circularId": 38436,
  "body": "E. Bissaldi (Politecnico and INFN Bari), A. Holzmann Airasca (UniTrento and INFN Bari)\nand T. Khalil (Johannesburg Univ) report on behalf of the Fermi-LAT Collaboration:\n\n\n\nOn Dec 4, 2024, Fermi-LAT detected high-energy emission from GRB 241204A,\nwhich was also detected by Fermi-GBM (trigger 754976367 / 241204.152).\n\nThe best LAT on-ground location is found to be:\n\nRA, Dec =  316.50, 6.55 (J2000),\n\nwith an error radius of 0.5 deg (90 % containment, statistical error only).\nThis was 26 deg from the LAT boresight at the time of the GBM trigger (T0 = 03:39:22.51 UT).\n\nThe data from the Fermi-LAT show a significant increase in the event rate\nthat is spatially and temporally correlated with the GBM emission\nwith high significance.\nThe photon flux above 100 MeV in the time interval 0 - 350 s after the GBM trigger\nis (1.7 +/- 0.4) E-5 ph/cm2/s.\nThe estimated photon index above 100 MeV is 2.8 +/- 0.4.\nThe highest-energy photon is a 260 MeV event which is observed ~16 seconds after the GBM trigger.\n\nThe Fermi-LAT point of contact for this burst is Tamador Khalil (tamtam2030@gmail.com).\n\n\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.",
  "subject": "GRB 241204A: Fermi-LAT detection",
  "eventId": "GRB 241204A",
  "submittedHow": "web",
  "submitter": "Elisabetta Bissaldi at Politecnico and INFN Bari <elisabetta.bissaldi@ba.infn.it>"
}