The new release of the fourth Fermi LAT source catalog


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  • <p>ICRC</p>


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  • uploaded June 25, 2021

Discussion timeslot (ZOOM-Meeting): 12. July 2021 - 18:00
ZOOM-Meeting URL:
ZOOM-Meeting ID: 98542982538
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session:
Live-Stream URL:

'The third release of the Fourth Catalog of Fermi-LAT Sources (4FGL-DR3), based on 12 years of data between 50 MeV and 1 TeV, is presented. Improvements in the analysis method relative to the original 4FGL catalog and new features are reviewed. The 4FGL-DR3 includes about 750 more sources than the previous release (4FGL-DR2, obtained with 10 years of data) and about 1500 more sources than 4FGL. About 40% of the new sources are associated with counterparts at other wavelengths, which are mostly blazar candidates. The properties of the global set of unassociated sources reported in the catalog are discussed, with particular attention to those lying close to the Galactic plane. A population of unassociated sources that do not fit in with already known classes of gamma-ray emitters is emphasized.'

Authors: Benoit Lott
Co-Authors: Philippe Bruel | Toby Burnett | Jean Ballet | for the Fermi-LAT collaboration
Collaboration: Ferrmi-LAT

Indico-ID: 571
Proceeding URL:

Presenter: Benoit Lott

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