4FGL-DR4: Fermi LAT 14-Year Gamma-Ray Point Source Catalog

Fermi LAT's 14-year catalog (4FGL-DR4) lists high-energy gamma-ray sources detected from 50 MeV to 1 TeV. The NASA HEASARC updated this database table in February 2024 using data from the Fermi Science Support Center. It provides updated spectral parameters, energy distributions, and light curves for all sources.

Use Cases

• Identify and classify gamma-ray point sources based on spectral parameters and associations.
• Analyze spectral energy distributions for detected sources across the 50 MeV to 1 TeV range.
• Study source variability over time using updated light curves.
• Cross-match Fermi-LAT sources with counterparts in other astronomical catalogs.

Strengths

• Covers 14 years of science data from the Fermi Large Area Telescope.
• Provides updated spectral parameters, energy distributions, and light curves for all sources.
• Analysis methods are consistent with the previous 12-year catalog release.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

NASA HEASARC, using data from the Fermi Science Support Center.

Collection Method

Analysis of data from the Fermi Gamma-ray Space Telescope's Large Area Telescope.

Time Range

First 14 years of Fermi LAT science data.

Freshness

Last updated 2026-03-13 18:27:42.934939; freshness should be verified.

Geography

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