{
  "bibcode": "2017GCN.20544....1M",
  "body": "E. Moretti (MPP), G. Vianello (Stanford Univ.), E. Bissaldi (INFN and Politecnico Bari), J. Racusin (NASA/GSFC) and M. Axelsson (Stockholm Univ. and KTH Stockholm) report on behalf of the Fermi-LAT team:\n\nOn January, 27, 2017 Fermi-LAT detected high-energy emission from GRB 170127C, which was also detected by Fermi-GBM starting at T0 = 01:35:47.79 (trigger 507173752 / 170127067; Bissaldi et al. GCN 20543).\n\n\nThe best LAT on-ground location is found to be\n\nRA, Dec =  339.3, -63.9 (J2000)\n\nwith an error radius of 0.4 deg (90 % containment, statistical error only).\n\nThe location was outside the LAT field-of-view at the time of the trigger. The event triggered an autonomous repoint of the spacecraft, causing the location to enter the field-of-view around 300s later.\n\nThe data from the Fermi-LAT show a significant increase in the event rate that is spatially correlated with the trigger with high significance.\n\nThe highest-energy photon is a 500 MeV event which is observed 2890 seconds after the GBM trigger. A total of 5 photons above 100 MeV were detected up to 4000s after the trigger.\n\nA Swift ToO has been requested for this burst.\n\n\nThe Fermi-LAT point of contact for this burst is Elena Moretti (moretti@mpp.mpg.de<mailto:moretti@mpp.mpg.de>).\n\n\nThe Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater\nthan 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and\nmany scientific institutions across France, Italy, Japan and Sweden.",
  "circularId": 20544,
  "createdOn": 1485537088000,
  "email": "magaxe@kth.se",
  "subject": "GRB 170127C: Fermi-LAT detection",
  "submitter": "Magnus Axelsson at Stockholm U.  <magaxe@kth.se>",
  "eventId": "GRB 170127C"
}