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First Fermi-LAT Catalog of Sources above 10 GeV (1FHL)

Published by National Aeronautics and Space Administration | National Aeronautics and Space Administration | Metadata Last Checked: February 21, 2026 | Last Modified: 2025-03-31
This catalog of LAT sources above 10 GeV reports the locations, spectra, and variability properties of the 514 sources significantly detected in this range during the first three years of the Fermi mission. Many of these sources are already included in the 2FGL catalog, although in that catalog their characterization is dominated by the much larger numbers of gamma rays detected in the energy range 0.1 to 10 GeV.

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