{
  "bibcode": "2019GCN.24560....1K",
  "body": "D. Kocevski (NASA/MSFC), M. Axelsson (KTH and Stockholm Univ.), L. Scotton (INFN Torino), E. Burns (NASA/GSFC), and M. Arimoto (Kanazawa Univ.) report on behalf of the Fermi-LAT team: \n\nAt 04:33:03 on 2019-05-15, Fermi-LAT triggered on high-energy emission from short GRB 190515A, which was also detected by Fermi-GBM  (trigger 579587588/190515190).\n\nThe best LAT on-ground location is found to be\n\nRA, Dec = 137.687 , 29.276 (J2000) \n\nwith an error radius of 0.907 deg (90% containment, statistical error only). This was 44 deg from the LAT boresight at the time of the trigger and 10 deg from the center of the GBM localization (GCN 24550).\n\nThe data from the Fermi-LAT show a significant increase in the event rate that is temporally correlated with the GBM emission with high significance. The highest-energy photon is a 874 MeV event which is observed 3 seconds after the GBM trigger.\n\nThe photon flux above 100 MeV in the time interval 0-300s after the GBM trigger is 6.5e-06 ph/cm2/s +/- 2.4e-06. The estimated photon index above 100 MeV is -2.6 +/- 0.5.\n\nThe Fermi-LAT point of contact for this burst is Magnus Axelsson (magnusa@fysik.su.se). \n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.",
  "circularId": 24560,
  "createdOn": 1557972330000,
  "email": "dankocevski@gmail.com",
  "subject": "GRB 190515A: Fermi-LAT detection",
  "submitter": "Daniel Kocevski at GSFC  <dankocevski@gmail.com>",
  "eventId": "GRB 190515A"
}