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The Fourth Catalog ...
The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope : Data Release 3
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- Ajello, M. (author)
- Clemson Univ, Dept Phys & Astron, Kinard Lab Phys, Clemson, SC 29634 USA.
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- Ciprini, S. (author)
- Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.;Agenzia Spaziale Italiana, Space Sci Data Ctr, Via Politecn Snc, I-00133 Rome, Italy.
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- Larsson, Stefan (author)
- Stockholms universitet,KTH,Partikel- och astropartikelfysik,Oskar Klein Ctr Cosmoparticle Phys, AlbaNova, SE-10691 Stockholm, Sweden.,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Zaharijas, G. (author)
- Univ Nova Gorica, Ctr Astrophys & Cosmol, Nova Gorica, Slovenia.
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Clemson Univ, Dept Phys & Astron, Kinard Lab Phys, Clemson, SC 29634 USA Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.;Agenzia Spaziale Italiana, Space Sci Data Ctr, Via Politecn Snc, I-00133 Rome, Italy. (creator_code:org_t)
- 2022-11-16
- 2022
- English.
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In: Astrophysical Journal Supplement Series. - : IOP Publishing Ltd. - 0067-0049 .- 1538-4365. ; 263:2
- Related links:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
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- An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 yr of E > 50 MeV gamma-ray data, where the spectral parameters, spectral energy distributions (SEDs), yearly light curves, and associations have been updated for all sources. The new reported AGNs include 587 blazar candidates and four radio galaxies. We describe the properties of the new sample and outline changes affecting the previously published one. We also introduce two new parameters in this release, namely the peak energy of the SED high-energy component and the corresponding flux. These parameters allow an assessment of the Compton dominance, the ratio of the inverse-Compton to the synchrotron-peak luminosities, without relying on X-ray data.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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