Speaker
Description
The Third Catalog of Hard Fermi-LAT Sources (3FHL), based on the first 7 years of LAT data using the Pass 8 event-level analysis, contains 1556 sources in the 10 GeV--2 TeV energy range. The sensitivity and angular resolution are improved by factors of 3 and 2 relative to the previous LAT catalog in this energy range (1FHL). Most 3FHL sources (79%) are extragalactic, including 16 sources located at very high redshift (z>2), while 9% are Galactic and 12% are unassociated (or associated with sources of unknown nature). The catalog includes 214 new gamma-ray sources. The substantial increase in the number of photons (more than 4 times the number in 1FHL and 10 times that of 2FHL) also allows us to characterize spectral curvature for 32 sources and flux variability for 163 of them. The 3FHL catalog provides an excellent opportunity to relate observations from space to those accessible from the ground (e.g. H.E.S.S., MAGIC, VERITAS, HAWC, and in the near future the Cherenkov Telescope Array).
