GCN Circular 14675
Subject
GRB 130518A: Fermi LAT detection
Date
2013-05-18T21:02:32Z (11 years ago)
From
Julie McEnery at NASA/GSFC <julie.e.mcenery@nasa.gov>
Nicola Omodei (Stanford) and Julie McEnery (GSFC) report on behalf of
the Fermi-LAT team:
At 13:54:37.53 UT on 18 May 2013, Fermi LAT detected high energy
emission from GRB 130518A, which was also detected by Fermi-GBM (trigger
390578080 /130518580, GCN 14674).
The best LAT on-ground location is found to be RA=355.809, DEC=47.641
(J2000) with an error radius of 0.34 deg (68% containment, statistical
error only).
The burst was about 43 deg from the LAT boresight at the time of the
trigger.
The data from the Fermi LAT shows emission lasting approximately 100
seconds with a TS of 50.
Multi-peaked emission lasting roughly 40 seconds can be seen using the
non-standard LAT Low Energy (LLE) with a significance of ~15 sigma.
A Swift TOO request has been submitted.
The Fermi LAT point of contact for this burst is Sara Cutini
(sara.cutini@asdc.asi.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.