Incremental Fermi Large Area Telescope Fourth Source Catalog

Understand

We present an incremental version (4FGL-DR3, for Data Release 3) of the fourth Fermi-LAT catalog of gamma-ray sources.

• Based on the first twelve years of science data in the energy range from 50 MeV to 1 TeV, it contains 6658 sources.
• The analysis improves on that used for the 4FGL catalog over eight years of data: more sources are fit with curved spectra, we introduce a more robust spectral parameterization for pulsars, and we extend the spectral points to 1 TeV.
• The spectral parameters, spectral energy distributions, and associations are updated for all sources.