Fermi Large Area Telescope Second Source Catalog

By The Fermi-LAT Collaboration. 2011

294 citations recorded by the source corpus.

We present the second catalog of high-energy γ -ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi) , derived from data taken during the ﬁrst 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average ﬂux over the 24 month period. The second Fermi -LAT catalog (2FGL) includes source location regions, deﬁned in terms of elliptical ﬁts to the 95% conﬁdence regions and spectral ﬁts in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are ﬂux measurements in ﬁve energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the ﬁrst Fermi -LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution ﬂags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 MeV to 100 GeV range of which we consider 127 as being ﬁrmly identiﬁed and 1171 as being reliably associated with counterparts of known or likely γ -ray-producing source classes. properties of the sources in the catalog. We present a

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4d4220da62a9ae89fb98eba450a8fccc0c6ea810

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Citations in the corpus

THE SPECTRUM OF ISOTROPIC DIFFUSE GAMMA-RAY EMISSION BETWEEN 100 MeV AND 820 GeV (2014, methodology): “We include the 403 sources from the second LAT source catalog (2FGL; Nolan et al. 2012) from above and below the Galactic plane (|b| > 2◦) that are detected with a test statistic (TS) larger than 200 in that catalog as individual templates.”
Dark matter and pulsar model constraints from Galactic Center Fermi-LAT gamma-ray observations (2013, methodology): “fits introduced in the 2FGL catalogue [6] was created by fitting all-sky gamma ray data with a highly sophisticated physical model.”
Limits on dark matter annihilation signals from the Fermi LAT 4-year measurement of the isotropic gamma-ray background (2015, background): “The Fermi LAT has detected many extragalactic sources: among the 1873 sources in the 2FGL catalog, there are 672 blazars (all classified according to the Roma BZCAT(15)), 8 radio galaxies, 3 normal galaxies, 3 starburst galaxies and 2 Seyfert galaxies [2].”
Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications (2013, unknown): “We also applied an energy-dependent mask to remove events potentially associated with bright γ-ray sources in the 2FGL catalog [38] in our energy range.”
The IceCube Realtime Alert System (2016, background): “The list of monitored sources is based on the second Fermi point-source catalog [39], containing mostly BL-Lac objects and FSRQs, which have exhibited previous variable behavior and are visible to the follow-up telescopes.”
OBSERVATION AND CHARACTERIZATION OF A COSMIC MUON NEUTRINO FLUX FROM THE NORTHERN HEMISPHERE USING SIX YEARS OF ICECUBE DATA (2016, background): “Figure 15 shows the direction of the event with its angular uncertainty and nearby high-energy gamma-ray sources from Nolan et al. (2012), Acero et al. (2015), Wakely & Horan (2007) in a window centered around the arrival direction.”