{
  "bibcode": "2013GCN.15587....1V",
  "body": "G.Vianello (Stanford), N.Omodei (Stanford), report on behalf of the\nFermi-LAT team:\n\nAt 13:07:56.97on December 9, 2013, Fermi LAT detected a faint high energy\nsignal from GRB131209A, which was also detected by Fermi-GBM (trigger\n408287279/131209547).\n\nThe data from the Fermi LAT show a significant increase in the event rate\nwithin 10 degree of the GBM location after the GBM trigger that is\nspatially and temporally correlated with the GBM emission. Although the\ndetection is slightly above the 5 sigma level, there are only 4 photons\nlikely associated with this GRB in the first 200 s after the trigger. The\nlocalization has therefore a large statistical error. The best LAT\non-ground location is found to be RA, DEC 136.5, -33.2 (J2000) with an\nerror radius of 0.9 deg (68% containment, statistical error only), this was\n20 deg from the LAT boresight at the time of the trigger.\n\nThe Fermi LAT point of contact for this burst is Giacomo Vianello (\ngiacomov@stanford.edu).\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.",
  "circularId": 15587,
  "createdOn": 1386641161000,
  "email": "giacomov@slac.stanford.edu",
  "subject": "GRB 131209A: Fermi-LAT detection of a burst",
  "submitter": "Giacomo Vianello at SLAC  <giacomov@slac.stanford.edu>",
  "eventId": "GRB 131209A"
}