TITLE: GCN CIRCULAR NUMBER: 16069 SUBJECT: GRB 140402A: Fermi-LAT detection of a burst DATE: 14/04/02 07:45:08 GMT FROM: Elisabetta Bissaldi at U.Innsbruk/IAPP E. Bissaldi (University & INFN Trieste), G. Vianello (Stanford U.) J. Chiang (KIPAC/SLAC) report on behalf of the Fermi-LAT team: At 00:10:07.00 on April 02, 2014, Fermi-LAT detected high-energy emission from GRB 140402A, which was also detected by Fermi-GBM (trigger 418090209/140402007). The best LAT on-ground location is found to be RA, Dec 207.47, 5.87 (J2000) with an error radius of 0.20 deg (90% containment, statistical error only). This position was 13 deg from the LAT boresight at the time of the trigger and is consistent with the last GBM ground location. The data from the Fermi-LAT show a significant increase in the event rate within 10 degrees of the GBM location after the GBM trigger that is spatially and temporally correlated with the GBM emission with high significance. More than 10 photons above 100 MeV are observed within 800 seconds. The highest-energy photon is a 3.5 GeV event which is observed 6.8 seconds after the GBM trigger. These numbers may increase as more data become available. A Swift ToO has been requested for this burst. The Fermi-LAT point of contact for this burst is Elisabetta Bissaldi (Elisabetta.Bissaldi@ts.infn.it). 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.