Fermi Large Area Telescope Fourth Source Catalog Data Release 2

Understand

We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi-LAT catalog of gamma-ray sources.

• Based on the first ten years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL catalog did for eight years of data.
• The spectral parameters, spectral energy distributions and associations are updated for all sources.
• Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals).