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Details

Autor(en) / Beteiligte
Titel
Fermi Large Area Telescope Fourth Source Catalog
Ist Teil von
  • The Astrophysical journal. Supplement series, 2020-03, Vol.247 (1), p.33
Ort / Verlag
Goddard Space Flight Center: The American Astronomical Society
Erscheinungsjahr
2020
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
  • We present the fourth Fermi Large Area Telescope catalog (4FGL) of γ-ray sources. Based on the first eight years of science data from the Fermi Gamma-ray Space Telescope mission in the energy range from 50 MeV to 1 TeV, it is the deepest yet in this energy range. Relative to the 3FGL catalog, the 4FGL catalog has twice as much exposure as well as a number of analysis improvements, including an updated model for the Galactic diffuse γ-ray emission, and two sets of light curves (one-year and two-month intervals). The 4FGL catalog includes 5064 sources above 4 significance, for which we provide localization and spectral properties. Seventy-five sources are modeled explicitly as spatially extended, and overall, 358 sources are considered as identified based on angular extent, periodicity, or correlated variability observed at other wavelengths. For 1336 sources, we have not found plausible counterparts at other wavelengths. More than 3130 of the identified or associated sources are active galaxies of the blazar class, and 239 are pulsars.
Sprache
Englisch
Identifikatoren
ISSN: 0067-0049, 1538-4365
eISSN: 1538-4365
DOI: 10.3847/1538-4365/ab6bcb
Titel-ID: cdi_hal_primary_oai_HAL_hal_02309079v1

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