The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

Abstract

We present the first catalog of active galactic nuclei (AGN) detected by the LAT, corresponding to 11 months of data collected in scientific operation mode. The First LAT AGN Catalog (1LAC) includes 671 gamma-ray sources located at high Galactic latitudes (|b| > 10 deg) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs. Some LAT sources are associated with multiple AGNs, and consequently, the catalog includes 709 AGNs, comprising 300 BL Lacertae objects (BL Lacs), 296 flat-spectrum radio quasars (FSRQs), 41 AGNs of other types, and 72 AGNs of unknown type. We also classify the blazars based on their spectral energy distributions (SEDs) as archival radio, optical, and X-ray data permit. In addition to the format 1LAC sample, we provide AGN associations for 51 low-latitude LAT sources and AGN "affiliations" (unquantified counterpart candidates) for 104 high-latitude LAT sources without AGN associations. The overlap of the 1LAC with existing gamma-ray AGN catalogs (LBAS, EGRET, AGILE, Swift, INTEGRAL, TeVCat) is briefly discussed. Various properties--such as gamma-ray fluxes and photon power law spectral indices, redshifts, gamma-ray luminosities, variability, and archival radio luminosities--and their correlations are presented and discussed for the different blazar classes. We compare the 1LAC results with predictions regarding the gamma-ray AGN populations, and we comment on the power of the sample to address the question of the blazar sequence.

68 pages, 28 figures; submitted to ApJ; electronic tables available by clicking the link in the top left of http://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermilac.html

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• The redshift distribution of BL Lacs and FSRQs
• Long-term optical and $\gamma -$ray variability of the blazar PKS~1222+216
• Cherenkov telescope array extragalactic survey discovery potential and the impact of axion-like particles and secondary gamma rays
• The spectral variability of FSRQs
• Polarization and Variation of Near-IR Light from Fermi/LAT gamma-ray Sources
• Revisiting Correlations Between Broad-Line and Jet Emission Variations for AGNs: 3C 120 and 3C 273
• A New Result on the Origin of the Extragalactic Gamma-ray Background
• Blazar jet physics in the age of Fermi
• Scheduling and calibration strategy for continuous radio monitoring of 1700 sources every three days
• Luminosity of ultrahigh energy cosmic rays and bounds on magnetic luminosity of radio-loud active galactic nuclei
• Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
• Search for Very-High-Energy Gamma Rays from the z = 0.896 Quasar 4C +55.17 with the MAGIC telescopes
• A New Method to Study the Origin of the EGB and the First Application on AT20G
• Searching for an EBL attenuation signature in the Fermi/LAT 1st year catalog data
• Constraints on the Optical-IR extragalactic background from gamma-ray absorption studies
• On the mechanism of the pulsed high energy emission from the pulsar PSR B1509-58
• Source Count Distribution of Fermi LAT Gamma-Ray Blazars Using Novel Nonparametric Methods
• Astrophysical Evidence of Wakefield Acceleration in Galactic and Extragalactic Jets via Gamma Rays and UHECRs
• A puzzle of radio-quiet quasar PG 1407+265: are optical and X-ray emissions produced from relativistic jet?
• Multiwavelength Probes of the Environs of Relativistic Shocks in Blazar Jets
• Search for neutrino emission in gamma-ray flaring blazars with the ANTARES telescope
• Very high energy $\gamma$-ray emission from RBS 0679
• Gamma-ray variability and correlation properties of blazars observed with Fermi LAT
• Disentangling the nature of the prototype radio weak BL Lac: Contemporaneous multifrequency observations of WISE J141046.00 + 740511.2
• Is Low-Frequency-Peaked BL Lac Object OJ 287 a TeV Emitter?
• Constraining the $\gamma$-ray Emission Region for Fermi-Detected FSRQs by the Seed Photon Approach
• Searches for very high energy gamma rays from blazars with CANGAROO-III telescope in 2005-2009
• The physical properties of candidate neutrino-emitter blazars
• Correlation between Ultra-high Energy Cosmic Rays and Active Galactic Nuclei from Fermi Large Area Telescope
• Supermassive black holes and their surroundings: MeV signatures
• Transient Point Source Analyses in the ANTARES Neutrino Telescope
• Inverse Compton Scattering of Radiation from a Central Source as a Possible Mechanism for the Formation of X-Ray Radiation from Kiloparsec Jets of Core-Dominated Quasars
• New blazar candidates from the 9Y-MST catalogue detected at energies higher than 10 GeV
• A variability study of the AGILE first catalog of γ-ray sources on 2.3 years of AGILE pointed observations
• Fermi LAT detection of two high Galactic latitude gamma-ray sources, Fermi J1049.7+0435 and J1103.2+1145