TITLE: GCN CIRCULAR NUMBER: 17989 SUBJECT: GRB 150702A: Fermi-LAT detection DATE: 15/07/04 22:56:29 GMT FROM: Giacomo Vianello at SLAC G.Vianello (Stanford University), M.E. Monzani (SLAC), M. Axelsson (Stockholm University) report on behalf of the Fermi-LAT team: On July, 02, 2015 Fermi-LAT detected high-energy emission from GRB 150702A, which triggered Fermi-GBM at 23:56:38.55 UT (trigger 457574201 / 150702998). The LAT data from this burst were made available to the Fermi collaboration and to the public with an unusually long delay, due to an issue with ground software which affected the event reconstruction pipeline. This issue has now been solved. The best LAT on-ground location is found to be RA, Dec = 52.78, -57.00 (J2000) with an error radius of 0.36 deg (90 % containment, statistical error only). The GRB was outside the field of view of the LAT at the trigger time, but entered the FOV ~500 s after the trigger and exited again ~3000 s after the trigger. The data from the Fermi-LAT show a significant increase in the event rate that is spatially and temporally correlated with the trigger with high significance. The highest-energy photon is a 800 MeV event which is observed ~1200 seconds after the GBM trigger. A Swift ToO has been requested for this burst. The Fermi-LAT point of contact for this burst is Magnus Axelsson (magnusa@astro.su.se). The 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.