{
  "body": "R. Gupta (NASA/GSFC), F. Longo (University and INFN, Trieste), and A.\nHolzmann (DF, University of Buenos Aires, Argentina) report on behalf of\nthe Fermi-LAT Collaboration:\n\n\nAt 14:03:51.50 on May, 27, 2024 Fermi-LAT detected high-energy emission\nfrom GRB 240527B which was also detected by Fermi-GBM (trigger 738511436 /\n240527586, GCN 36546).\n\nThe best LAT on-ground location is found to be\n\nRA, Dec = 128.10, -14.48 (J2000)\n\nwith an error radius of 0.19 deg (90 % containment, statistical error only).\n\nThis was 77 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\nthat is spatially and temporally correlated with the trigger with high\nsignificance. The photon flux above 100 MeV in the time interval 0-3000 s\nafter the GBM trigger is (6.2 +/- 3.0) E-7 ph/cm2/s. The estimated photon\nindex above 100 MeV is - 1.6+/- 0.2.\n\nThe highest-energy photon is a 4.0 GeV event which is observed about\n1200 seconds after the GBM trigger.\n\nA Swift ToO has been approved.\n\nThe Fermi-LAT point of contact for this burst is Rahul Gupta (\nrahul.gupta@nasa.gov).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy\nband from 20 MeV to greater than 300 GeV. It is the product of an\ninternational collaboration between NASA and DOE in the U.S. and many\nscientific institutions across France, Italy, Japan and Sweden.\n",
  "bibcode": "2024GCN.36550....1G",
  "subject": "GRB 240527B: Fermi-LAT detection",
  "eventId": "GRB 240527B",
  "submitter": "Rahul Gupta at NASA/GSFC <rahulbhu.c157@gmail.com>",
  "createdOn": 1716851379309,
  "submittedHow": "email",
  "circularId": 36550
}