{
  "bibcode": "2015GCN.17576....1A",
  "body": "M. Axelsson (KTH Royal Institute of Technology, Sweden), D. Kocevski (NASA/GSFC)\nand J. Racusin (NASA/GSFC) report on behalf of the Fermi-LAT team:\n\nAt 04:54:50.9 UT on March 14, 2015, Fermi-LAT detected\nhigh-energy emission from GRB 150314A, which was also detected by Fermi-GBM\n(trigger 448001693/150314205) and Swift (Hagen et al., GCN 17573), and a possible\noptical counterpart by KAIT (Zhang et al., GCN 17574).\n\nThe best LAT on-ground location is found to be\n\nRA, Dec 125.40, 64.46 (J2000)\n\nwith an error radius of 0.85 deg (90% containment, statistical error only) and consistent\nwith the Swift/XRT location. This was ~40 deg from the LAT boresight at the time of the\ntrigger and triggered an autonomous repoint of the spacecraft.\n\nThe data from the Fermi-LAT show a significant increase in the event rate within 10 degrees\nof the Swift/XRT location after the trigger. More than 14 photons above 100 MeV are observed\nwithin 500 seconds. The highest-energy photon is a 670 MeV event which is\nobserved 78 seconds after the GBM trigger.\n\nThe Fermi-LAT point of contact for this burst is\nMagnus Axelsson (magnus.axelsson@astro.su.se<mailto:magnus.axelsson@astro.su.se>).\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.",
  "circularId": 17576,
  "createdOn": 1426341767000,
  "email": "magaxe@kth.se",
  "subject": "GRB 150314A: Fermi-LAT detection",
  "submitter": "Magnus Axelsson at Stockholm U.  <magaxe@kth.se>",
  "eventId": "GRB 150314A"
}