Fourth Fermi-LAT Catalog of High-Energy Sources (4FHL)
This catalog of LAT sources reports the locations and spectra of sources significantly detected in the 50 GeV - 2 TeV energy range during 16 years of the Fermi mission using the Pass 8 event-level analysis.
For a full description of the catalog see the LAT 4FHL Catalog Paper.
4FHL Catalog Data Tables
The Fourth LAT High-Energy Catalog is available as FITS and XML files. These files are linked below.
- Fourth LAT High-Energy Catalog paper
- Main 4FHL Catalog file (FITS file)
- Main 4FHL Catalog file (XML file)
- DS9 region files:
- 4FHL_sources.reg includes 4FHL source positions marked with crosses and labeled by source name
- 4FHL_errors_and_extensions.reg includes 68% positional uncertainty circles for point sources, including systematic uncertainty. For extended sources, source extension/profile is shown instead of a localization error
- 4FHL_associations.reg includes 4FHL source positions labeled by their associated counterpart names, when available
- Extended Source template archive
Fourth LAT High-Energy Catalog Change Log
| Rev | Date | Filename | Change Description |
|---|---|---|---|
| v14 | August 2026 | gll_psch_v14.fit | Initial preliminary release. |