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THE SECOND CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE

Journal Article · · Astrophysical Journal
; ; ; ; ; ; ; ;  [1]; ;  [2]; ;  [3];  [4]; ; ;  [5];  [6];  [7];  [8] more »; « less
  1. W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
  2. Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
  3. Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States)
  4. Department of Astronomy, Stockholm University, SE-106 91 Stockholm (Sweden)
  5. Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
  6. Laboratoire AIM, CEA-IRFU/CNRS/Universite Paris Diderot, Service d'Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France)
  7. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
  8. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
+ Show Author Affiliations
The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented. The second LAT AGN catalog (2LAC) includes 1017 {gamma}-ray sources located at high Galactic latitudes (|b| > 10 Degree-Sign ) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs. However, some of these are affected by analysis issues and some are associated with multiple AGNs. Consequently, we define a Clean Sample which includes 886 AGNs, comprising 395 BL Lacertae objects (BL Lac objects), 310 flat-spectrum radio quasars (FSRQs), 157 candidate blazars of unknown type (i.e., with broadband blazar characteristics but with no optical spectral measurement yet), 8 misaligned AGNs, 4 narrow-line Seyfert 1 (NLS1s), 10 AGNs of other types, and 2 starburst galaxies. Where possible, the blazars have been further classified based on their spectral energy distributions (SEDs) as archival radio, optical, and X-ray data permit. While almost all FSRQs have a synchrotron-peak frequency <10{sup 14} Hz, about half of the BL Lac objects have a synchrotron-peak frequency >10{sup 15} Hz. The 2LAC represents a significant improvement relative to the first LAT AGN catalog (1LAC), with 52% more associated sources. The full characterization of the newly detected sources will require more broadband data. 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. The general trends observed in 1LAC are confirmed.
OSTI ID:
22004415
Journal Information:
Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 743; ISSN ASJOAB; ISSN 0004-637X
Country of Publication:
United States
Language:
English

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Evaluating the Classification of Fermi BCUs from the 4FGL Catalog Using Machine Learning journal December 2019
Spectroscopy of high-energy BL Lacertae objects with X-shooter on the VLT journal April 2014
Unveiling the nature of the unidentified gamma-ray sources V: analysis of the radio candidates with the kernel density estimation text January 2014
Discovery of TeV γ -ray emission from PKS 0447-439 and derivation of an upper limit on its redshift text January 2013
Location of γ -ray emission and magnetic field strengths in OJ 287 journal January 2017
Horizon-Scale Lepton Acceleration in Jets: Explaining the Compact Radio Emission in m87 journal August 2015
Search for very high energy gamma-rays from the z = 0.896 quasar 4C +55.17 with the MAGIC telescopes journal March 2014
Blazar candidates beyond redshift 4 observed by Swift journal November 2014
Fermi Large Area Telescope Fourth Source Catalog collection January 2020
VLBI observations of flared optical quasar CGRaBS J0809+5341 journal August 2016
A broad-band spectro-polarimetric view of the NVSS rotation measure catalogue – II. Effects of off-axis instrumental polarization journal May 2019
Constraining the Physical Conditions in the jets of γ-Ray Flaring Blazars Using Centimeter-Band Polarimetry and Radiative Transfer Simulations. i. data and Models for 0420–014, oj 287, and 1156+295 journal July 2014
Correlation between γ-ray and radio emissions in Fermi blazars journal December 2014
MOJAVE. XIII. PARSEC-SCALE AGN JET KINEMATICS ANALYSIS BASED ON 19 YEARS OF VLBA OBSERVATIONS AT 15 GHz journal June 2016
THE IMPORTANCE OF JET BENDING IN GAMMA-RAY AGNs—REVISITED journal March 2014
UNVEILING THE NATURE OF THE UNIDENTIFIED GAMMA-RAY SOURCES. IV. THE SWIFT CATALOG OF POTENTIAL X-RAY COUNTERPARTS journal October 2013
Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase text January 2018
Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406 journal June 2013
Research and characterisation of blazar candidates among the Fermi /LAT 3FGL catalogue using multivariate classifications journal June 2017
Unveiling the nature of the unidentified gamma-ray sources IV: the $\textit{Swift}$ catalog of potential X-ray counterparts text January 2014
Radio Follow-up on All Unassociated Gamma-Ray Sources from the Third Fermi Large Area Telescope Source Catalog journal April 2017
Study of the PeV neutrino, γ-rays, and UHECRs around the lobes of Centaurus A journal September 2018
IMPLICATIONS OF PLASMA BEAM INSTABILITIES FOR THE STATISTICS OF THE FERMI HARD GAMMA-RAY BLAZARS AND THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND journal July 2014
The F-GAMMA programme: multi-frequency study of active galactic nuclei in the Fermi era : Programme description and the first 2.5 years of monitoring⋆ journal November 2016
Relativistic Jets in the Radio Reference Frame Image Database II: Blazar Jet Accelerations from the First 10 Years of Data (1994 - 2003) text January 2012
On weak Redshift Dependence of Gamma-Ray Spectra of Distant Blazars journal May 2012
The BL-Lac gamma-ray blazar PKS 0447-439 as a probable member of a group of galaxies at z = 0.343 journal February 2015
Diffuse Neutrino Intensity from the Inner Jets of Active Galactic Nuclei: Impacts of External Photon Fields and the Blazar Sequence text January 2014
The most luminous H α emitters at z ∼ 0.8–2.23 from HiZELS: evolution of AGN and star-forming galaxies journal February 2016
SUZAKU OBSERVATIONS OF γ-RAY BRIGHT RADIO GALAXIES: ORIGIN OF THE X-RAY EMISSION AND BROADBAND MODELING journal December 2014

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BL LACERTAE OBJECTS
CATALOGS
ENERGY SPECTRA
GALAXIES
GALAXY NUCLEI
GAMMA RADIATION
LUMINOSITY
PHOTONS
QUASARS
RED SHIFT
TELESCOPES
X RADIATION