{
  "bibcode": "2015GCN.18228....1A",
  "body": "GRB 150902A: Fermi-LAT detection\n\nM. Arimoto (Tokyo Tech), M. Axelsson (KTH Stockholm), J. Racusin (NASA/GSFC), E. Bissaldi (INFN Bari),\nD. Kocevski (NASA/GSFC) report on behalf of the Fermi-LAT team:\n\nAt 17:35:39.37 UT on 2015-09-02, Fermi-LAT detected high-energy emission from GRB 150902A,\nwhich was also detected by Fermi-GBM (trigger 462908143/150902733).\n\nThe best LAT on-ground location is found to be\n\nRA, Dec = 214.926, -69.361 degrees (J2000)\n\nwith an error radius of 0.127 deg (90% containment, systematic error only). This was 38 deg\nfrom the LAT boresight at the time of the trigger and triggered an autonomous repoint of the\nspacecraft.\n\nThe data from the Fermi-LAT show a significant increase in the event rate that is spatially and\ntemporally correlated with the GBM emission. More than 50 photons above 100 MeV and 9\nphotons above 1 GeV were observed within 300 seconds. The highest-energy photon is a 11 GeV\nevent which is observed ~100 seconds after the GBM trigger.\n\nA Swift ToO has been requested for this burst.\n\nThe Fermi-LAT point of contact for this burst is Daniel Kocevski (daniel.kocevski@nasa.gov<mailto:daniel.kocevski@nasa.gov>).\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV\nto greater than 300 GeV. It is the product of an international collaboration between NASA and\nDOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.",
  "circularId": 18228,
  "createdOn": 1441264746000,
  "email": "magaxe@kth.se",
  "subject": "GRB 150902A: Fermi-LAT detection",
  "submitter": "Magnus Axelsson at Stockholm U.  <magaxe@kth.se>",
  "eventId": "GRB 150902A"
}