Fermi LAT 1FHL: High-Energy Gamma-Ray Source Catalog (2008-2011)

From 2008 August 4 to 2011 August 1, the Fermi Large Area Telescope (LAT) collected gamma-ray data above 10 GeV. The resulting catalog (1FHL) contains 514 sources, with 449 (87%) associated with known objects, including 393 active galactic nuclei and 27 pulsars. This table was created by NASA HEASARC in April 2015 based on data from the Fermi Gamma-ray Space Telescope mission.

Use Cases

• Identify candidate sources for follow-up observations above 50-100 GeV based on the highlighted subset.
• Study source variability and spectral characteristics in the 10-500 GeV range.
• Analyze contributions of unresolved sources to the isotropic gamma-ray background (27% +/- 8%).
• Cross-match and associate gamma-ray sources with known cataloged sources at other wavelengths.

Strengths

• Catalog contains 514 distinct high-energy gamma-ray sources.
• Provides detailed associations, with 393 sources identified as active galactic nuclei.
• Covers a defined three-year time interval with specific data selection criteria to limit atmospheric contamination.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is from 2008-2011; freshness should be verified for current research.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Data from the Fermi Large Area Telescope (LAT) accumulated during the first 3 years of the Fermi mission, processed and cataloged by the authors.

Time Range

2008-08-04 to 2011-08-01

Freshness

Last updated 2026-03-13 18:48:54.058846; freshness should be verified.

Geography

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