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2020ApJ...892..105A - Astrophys. J., 892, 105-105 (2020/April-1)

The fourth catalog of active galactic nuclei detected by the Fermi Large Area Telescope.

AJELLO M., ANGIONI R., AXELSSON M., BALLET J., BARBIELLINI G., BASTIERI D., BECERRA GONZALEZ J., BELLAZZINI R., BISSALDI E., BLOOM E.D., BONINO R., BOTTACINI E., BRUEL P., BUSON S., CAFARDO F., CAMERON R.A., CAVAZZUTI E., CHEN S., CHEUNG C.C., CIPRINI S., COSTANTIN D., CUTINI S., D'AMMANDO F., DE LA TORRE LUQUE P., DE MENEZES R., DE PALMA F., DESAI A., DI LALLA N., DI VENERE L., DOMINGUEZ A., FANA DIRIRSA F., FERRARA E.C., FINKE J., FRANCKOWIAK A., FUKAZAWA Y., FUNK S., FUSCO P., GARGANO F., GARRAPPA S., GASPARRINI D., GIGLIETTO N., GIORDANO F., GIROLETTI M., GREEN D., GRENIER I.A., GUIRIEC S., HARITA S., HAYS E., HORAN D., ITOH R., JOHANNESSON G., KOVAC'EVIC' M., KRAUSS F., KRETER M., KUSS M., LARSSON S., LETO C., LI J., LIODAKIS I., LONGO F., LOPARCO F., LOTT B., LOVELLETTE M.N., LUBRANO P., MADEJSKI G.M., MALDERA S., MANFREDA A., MARTI-DEVESA G., MASSARO F., MAZZIOTTA M.N., MEREU I., MEYER M., MIGLIORI G., MIRABAL N., MIZUNO T., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., NEGRO M., NEMMEN R., NUSS E., OJHA L.S., OJHA R., OMODEI N., ORIENTI M., ORLANDO E., ORMES J.F., PALIYA V.S., PEI Z., PENA-HERAZO H., PERSIC M., PESCE-ROLLINS M., PETROV L., PIRON F., POON H., PRINCIPE G., RAINO S., RANDO R., RANI B., RAZZANO M., RAZZAQUE S., REIMER A., REIMER O., SCHINZEL F.K., SERINI D., SGRO C., SISKIND E.J., SPANDRE G., SPINELLI P., SUSON D.J., TACHIBANA Y., THOMPSON D.J., TORRES D.F., TORRESI E., TROJA E., VALVERDE J., VAN ZYL P. and YASSINE M.

Abstract (from CDS):

The fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) between 2008 August 4 and 2016 August 2 contains 2863 objects located at high Galactic latitudes (| b| > 10^○). It includes 85% more sources than the previous 3LAC catalog based on 4 yr of data. AGNs represent at least 79% of the high-latitude sources in the fourth Fermi-Large Area Telescope Source Catalog (4FGL), which covers the energy range from 50 MeV to 1 TeV. In addition, 344 gamma-ray AGNs are found at low Galactic latitudes. Most of the 4LAC AGNs are blazars (98%), while the remainder are other types of AGNs. The blazar population consists of 24% Flat Spectrum Radio Quasars (FSRQs), 38% BL Lac-type objects, and 38% blazar candidates of unknown types (BCUs). On average, FSRQs display softer spectra and stronger variability in the gamma-ray band than BL Lacs do, confirming previous findings. All AGNs detected by ground-based atmospheric Cerenkov telescopes are also found in the 4LAC.

Journal keyword(s): Active galactic nuclei - Blazars - Gamma-ray sources - Relativistic jets - Quasars - BL Lacertae objects

VizieR on-line data: <Available at CDS (J/ApJ/892/105): highlat.dat lowlat.dat table5.dat table6.dat table7.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 376

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