Second Fermi-LAT Catalog of Low-Energy Sources (2FLE)
This catalog of LAT sources reports the locations and spectra of sources significantly detected in the 20 MeV - 200 MeV energy range during 14 years of the Fermi mission.
For a full description of the catalog see the LAT 2FLE Catalog Paper.
2FLE Catalog Data Products
The Second Fermi-LAT Low Energy Catalog is available as a FITS file. The catalog file, DS9 region files, and SED plots are linked below:
- Second LAT Low-Energy Catalog paper
- Main 2FLE Catalog file (FITS file)
- DS9 region files:
- 2fle_catalog_fk5_named.reg 2FLE positions (as crosses) and source names
- 2fle_catalog_galactic_named.reg 2FLE positions in Galactic coordinates
- 2fle_catalog_fk5_95_ellipses.reg 2FLE 95% error ellipses (no source names)
- 2fle_catalog_galactic_95_ellipses.reg 2FLE ellipses in Galactic coordinates
- 2fle_catalog_associations_fk5.reg 2FLE association positions (as diamonds) and names
- 2fle_catalog_associations_galactic.reg 2FLE association positions in Galactic coordinates
- SEDs_2FLE_4FGL_pdf.zip Plots of the 2FLE + 4FGL-DR4 spectral energy distributions
Second LAT Low-Energy Catalog Change Log
| Rev | Date | Filename | Change Description |
|---|---|---|---|
| v1 | October 2026 | 2fle_psc_v8.fit | Initial preliminary release. |