skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: γ-Ray And Parsec-Scale Jet Properties Of A Complete Sample Of Blazars From The Mojave Program

Journal Article · · The Astrophysical Journal
 [1]
  1. Purdue Univ., West Lafayette, IN (United States); et al.

We investigate the Fermi LAT -ray and 15 GHz VLBA radio properties of a joint -ray- and radio-selected sample of AGNs obtained during the first 11 months of the Fermi mission (2008 Aug 4 - 2009 Jul 5). Our sample contains the brightest 173 AGNs in these bands above declination -30° during this period, and thus probes the full range of -ray loudness ( -ray to radio band luminosity ratio) in the bright blazar population. The latter quantity spans at least four orders ofmagnitude, reflecting a wide range of spectral energy distribution (SED) parameters in the bright blazar population. The BL Lac objects, however, display a linear correlation of increasing -ray loudness with synchrotron SED peak frequency, suggesting a universal SED shape for objects of this class. The synchrotron self-Compton model is favored for the -ray emission in these BL Lacs over external seed photon models, since the latter predict a dependence of Compton dominance on Doppler factor that would destroy any observed synchrotron SED peak - -ray loudness correlation. The high-synchrotron peaked (HSP) BL Lac objects are distinguished by lower than average radio core brightness temperatures, and none display large radio modulation indices or high linear core polarization levels. No equivalent trends are seen for the flat-spectrum radio quasars (FSRQ) in our sample. Given the association of such properties with relativistic beaming, we suggest that the HSP BL Lacs have generally lower Doppler factors than the lower-synchrotron peaked BL Lacs or FSRQs in our sample.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
The MOJAVE Collaboration; The FERMI LAT Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1356784
Journal Information:
The Astrophysical Journal, Vol. 742, Issue 1; ISSN 0004-637X
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 85 works
Citation information provided by
Web of Science

References (160)

The Second Data Release of the Sloan Digital Sky Survey journal July 2004
The Third Data Release of the Sloan Digital Sky Survey journal March 2005
BRIGHT ACTIVE GALACTIC NUCLEI SOURCE LIST FROM THE FIRST THREE MONTHS OF THE FERMI LARGE AREA TELESCOPE ALL-SKY SURVEY journal July 2009
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG journal May 2010
PKS 1502+106: A NEW AND DISTANT GAMMA-RAY BLAZAR IN OUTBURST DISCOVERED BY THE FERMI LARGE AREA TELESCOPE journal January 2010
SPECTRAL PROPERTIES OF BRIGHT FERMI -DETECTED BLAZARS IN THE GAMMA-RAY BAND journal January 2010
THE SPECTRAL ENERGY DISTRIBUTION OF FERMI BRIGHT BLAZARS journal May 2010
The Sixth Data Release of the Sloan Digital Sky Survey
  • Adelman‐McCarthy, Jennifer K.; Agüeros, Marcel A.; Allam, Sahar S.
  • The Astrophysical Journal Supplement Series, Vol. 175, Issue 2 https://doi.org/10.1086/524984
journal April 2008
Optical Identification of the ASCA Medium Sensitivity Survey in the Northern Sky: Nature of Hard X‐Ray–Selected Luminous Active Galactic Nuclei journal October 2003
Discovery of Very High Energy γ-Rays from 1ES 1011+496 at z = 0.212 journal September 2007
Pearson-Readhead survey sources - Properties of the centimeter-wavelength flux and polarization of a complete radio sample journal November 1992
Pearson‐Readhead Survey Sources. II. The Long‐Term Centimeter‐Band Total Flux and Linear Polarization Properties of a Complete Radio Sample journal March 2003
The Molonglo Reference Catalog 1 Jy Radio Source Survey. IV. Optical Spectroscopy of a Complete Quasar Sample
  • Baker, Joanne C.; Hunstead, Richard W.; Kapahi, Vijay K.
  • The Astrophysical Journal Supplement Series, Vol. 122, Issue 1 https://doi.org/10.1086/313209
journal May 1999
Observations of the BL Lacertae Object 3C 66A with STACEE journal August 2005
A multi-epoch VLBI survey of the kinematics of CFJ sources: II. Analysis of the kinematics journal March 2008
Redshifts for Southern Quasars journal October 1975
Further Spectroscopic Observations of Quasi-Stellar Objects and Radio Galaxies journal April 1970
Large-scale jets in active galactic nuclei: multiwavelength mapping journal February 2001
DISCOVERY OF TWO MILLISECOND PULSARS IN FERMI SOURCES WITH THE NANÇAY RADIO TELESCOPE journal April 2011
The nature of the BL Lacertae object AO 0235 + 164 journal July 1987
The NRAO VLA Sky Survey journal May 1998
HUBBLE /COS OBSERVATIONS OF THE Lyα FOREST TOWARD THE BL Lac OBJECT 1ES 1553+113 journal August 2010
DiFX-2: A More Flexible, Efficient, Robust, and Powerful Software Correlator
  • Deller, A. T.; Brisken, W. F.; Phillips, C. J.
  • Publications of the Astronomical Society of the Pacific, Vol. 123, Issue 901 https://doi.org/10.1086/658907
journal March 2011
On the Beaming Statistics of Gamma-Ray Sources journal June 1995
New identifications and redshifts for southern 2-Jy radio sources journal August 1994
Gamma-ray-loud blazars and beaming journal April 1995
The Parkes half-jansky flat-spectrum sample journal January 1997
The CORALS survey I: New estimates of the number density and gas content of damped Lyman alpha systems free from dust bias journal November 2001
Optical spectrophotometry of blazars journal July 1994
PG 1553 + 11 - A bright optically selected BL Lacertae object journal October 1990
Redshift limits of BL Lacertae objects from optical spectroscopy journal November 2007
The first gamma-ray outburst of a narrow-line Seyfert 1 galaxy: the case of PMN J0948+0022 in 2010 July: First γ-ray outburst of a NLS1 journal March 2011
Decelerating Flows in TeV Blazars: A Resolution to the BL Lacertae-FR I Unification Problem journal August 2003
The FIRST‐2MASS Red Quasar Survey journal October 2007
4U1722 + 11: the discovery of an X-ray selected BL Lac object journal September 1989
Redshifts of Candidate Gamma-Ray Blazars journal February 2003
The Third EGRET Catalog of High‐Energy Gamma‐Ray Sources journal July 1999
CGRaBS: An All‐Sky Survey of Gamma‐Ray Blazar Candidates journal March 2008
Upper limit of peak area journal July 1983
The Bulk Lorentz Factor Crisis of TeV Blazars: Evidence for an Inhomogeneous Pileup Energy Distribution? journal March 2006
Redshifts for flat-spectrum radio sources in the second Caltech-Jodrell Bank VLBI sample journal September 1997
The large bright quasar survey. 6: Quasar catalog and survey parameters journal April 1995
An optical catalog of extragalactic emission-line objects similar to quasi-stellar objects journal February 1991
Magellan Spectroscopy of Low-Redshift Active Galactic Nuclei journal October 2009
Intrinsic Brightness Temperatures of AGN Jets journal April 2006
The Relation Between Radio Polarization and Gamma-Ray Emission in agn jets journal June 2010
Doppler factors, Lorentz factors, and viewing angles for quasars, BL Lacertae objects and radio galaxies journal March 2009
Detection of high-energy gamma rays from quasar PKS 0528 + 134 by EGRET on the Compton Gamma Ray Observatory journal May 1993
Energy distributions of blazars journal February 1988
Optical properties of quasars – I. Observations journal May 1991
The 6dF Galaxy Survey: final redshift release (DR3) and southern large-scale structures journal October 2009
Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array journal October 2005
Multiepoch Very Long Baseline Array Observations of EGRET‐detected Quasars and BL Lacertae Objects: Superluminal Motion of Gamma‐Ray Bright Blazars
  • Jorstad, Svetlana G.; Marscher, Alan P.; Mattox, John R.
  • The Astrophysical Journal Supplement Series, Vol. 134, Issue 2 https://doi.org/10.1086/320858
journal June 2001
Spectrophotometry of the QSO NRAO 530 journal July 1984
Sub‐Milliarcsecond Imaging of Quasars and Active Galactic Nuclei. III. Kinematics of Parsec‐scale Radio Jets journal July 2004
Sub-Milliarcsecond Imaging of Quasars and Active Galactic Nuclei journal April 1998
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: COSMOLOGICAL INTERPRETATION journal February 2009
IDENTIFICATION OF THE EARLY FERMI /LAT GAMMA-RAY BRIGHT OBJECTS WITH EXTRAGALACTIC VLBI SOURCES journal November 2009
The Relation Between agn Gamma-Ray Emission and Parsec-Scale Radio jets journal April 2009
Sub-Milliarcsecond Imaging of Quasars and Active Galactic Nuclei. IV. Fine-Scale Structure journal December 2005
Total Flux Density Variations in Extragalactic Radio Sources. II. Determining the Limiting Brightness Temperature for Synchrotron Sources journal January 1999
On the relationship between BL Lacertae objects and radio galaxies journal December 2008
The classification of BL Lacertae objects: the Ca H&K break journal November 2002
Optical Spectra of a Complete Sample of Radio Sources. I. The Spectra journal November 1996
Characteristics of Gamma-Ray loud Blazars in the vlba Imaging and Polarimetry Survey journal December 2010
Parsec‐Scale Jet Polarization Properties of a Complete Sample of Active Galactic Nuclei at 43 GHz journal November 2001
Relativistic Beaming and Flux Variability in Active Galactic Nuclei journal November 2001
MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. I. First-Epoch 15 GHz Linear Polarization Images journal October 2005
Mojave: Monitoring of jets in Active Galactic Nuclei with vlba Experiments. v. Multi-Epoch vlba Images journal February 2009
Mojave: Monitoring of jets in Active Galactic Nuclei with vlba Experiments. vi. Kinematics Analysis of a Complete Sample of Blazar jets journal November 2009
A CONNECTION BETWEEN APPARENT VLBA JET SPEEDS AND INITIAL ACTIVE GALACTIC NUCLEUS DETECTIONS MADE BY THE FERMI GAMMA-RAY OBSERVATORY journal April 2009
New Spectroscopic Observations of Twenty Quasi-Stellar Sources journal February 1967
Resolving Doppler-Factor Crisis in Active Galactic Nuclei: Non-Steady Magnetized Outflows journal September 2010
Comparative Analysis of the High- and Low-Ionization Lines in the Broad-Line Region of Active Galactic Nuclei journal May 1996
Roma-BZCAT: a multifrequency catalogue of blazars journal December 2008
The Likelihood Analysis of EGRET Data journal April 1996
FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE ACTIVE GALAXY 4C +55.17: STEADY, HARD GAMMA-RAY EMISSION AND ITS IMPLICATIONS journal August 2011
A Statistical Study of Rest‐Frame Optical Emission Properties in Luminous Quasars at \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $2.0\leq z\leq 2.5$ \end{document} journal March 1999
Imaging Redshift Estimates for bl Lacertae Objects journal February 2010
Redshifts of galaxies in the winter plane journal May 1988
Spectral energy distributions of a large sample of BL Lacertae objects journal December 2005
Blazar sequence – an artefact of Doppler boosting journal July 2008
Detection of the host galaxy of S5 0716+714 journal July 2008
Luminosity effects and the emission-line properties of quasars with 0 less than Z less than 3.8 journal December 1994
The Possible Determination of Two New BL Lac Redshifts book January 1986
Redshifts of southern radio sources. V journal September 1979
The Parsec‐Scale Structure and Jet Motions of the TeV Blazars 1ES 1959+650, PKS 2155−304, and 1ES 2344+514 journal January 2004
THE JETS OF TeV BLAZARS AT HIGHER RESOLUTION: 43 GHz AND POLARIMETRIC VLBA OBSERVATIONS FROM 2005 TO 2009 journal October 2010
Radio/Gamma-Ray time Delay in the Parsec-Scale Cores of Active Galactic Nuclei journal September 2010
Jet opening angles and gamma-ray brightness of AGN journal October 2009
Intraday variability in compact extragalactic radio sources: I. VLA observations journal January 2000
Spectroscopic monitoring of the BL Lac object AO 0235+164 journal January 2007
THREE MILLISECOND PULSARS IN FERMI LAT UNASSOCIATED BRIGHT SOURCES journal December 2010
The Properties of the Radio-Selected 1 J[CLC]y[/CLC] Sample of BL Lacertae Objects journal August 2001
BLAZARS IN THE FERMI ERA: THE OVRO 40 m TELESCOPE MONITORING PROGRAM journal May 2011
Limits and confidence intervals in the presence of nuisance parameters
  • Rolke, Wolfgang A.; López, Angel M.; Conrad, Jan
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 551, Issue 2-3 https://doi.org/10.1016/j.nima.2005.05.068
journal October 2005
Multi-frequency VLBA observations of compact sources from the Peacock and Wall catalogue journal April 2005
Spectral modelling of 1 ES 1218+30.4 journal January 2010
Redshifts of Southern Quasars journal October 1976
Relativistic beaming and gamma-ray brightness of blazars journal March 2010
European Southern Observatory very Large Telescope Optical Spectroscopy of bl Lacertae Objects. iii. an Extension of the Sample journal December 2008
Imaging Redshifts of BL Lacertae Objects journal December 2005
ESO Very Large Telescope Optical Spectroscopy of BL Lacertae Objects. II. New Redshifts, Featureless Objects, and Classification Assessments journal June 2006
Ten new BL Lacertae objects discovered by an efficient X-ray/radio/optical technique journal July 1993
Optical spectra and redshifts of quasi-stellar radio sources in the NRAO 5 GHz and 4C radio catalogs journal October 1977
The Sloan Digital sky Survey Quasar Catalog. v. Seventh data Release journal April 2010
Redshifts of Fifteen Radio Sources journal November 1968
Optical Spectroscopy of Bright Fermi lat Blazars journal September 2009
Spectrophotometric observations of Molonglo radio source identifications journal July 1977
Streaming motions of galaxy clusters within 12 000 km s-1 -- I. New spectroscopic data journal April 2000
A VLBA survey of the core shift effect in AGN jets: I. Evidence of dominating synchrotron opacity⋆ journal July 2011
A Northern Survey of Gamma‐Ray Blazar Candidates journal June 2005
Emission-line and continuum properties of 92 bright QSOs - Luminosity dependence and differences between radio-selected and optically selected samples journal December 1991
A redshift survey of IRAS galaxies. VII - The infrared and redshift data for the 1.936 Jansky sample journal November 1992
Optical spectroscopy of a complete sample of southern 2-Jy radio sources* journal August 1993
Spine–sheath layer radiative interplay in subparsec-scale jets and the TeV emission from M87 journal March 2008
TeV BL Lac objects at the dawn of the Fermi era journal January 2010
Characteristics of EGRET Blazars in the VLBA Imaging and Polarimetry Survey (VIPS) journal December 2007
Spectroscopy of radio sources from the Parkes 2700 MHz survey journal November 1990
Measuring the Brightness Temperature Distribution of Extragalactic Radio Sources with Space VLBI journal March 2001
Nonthermal continuum radiation in three elliptical galaxies journal June 1975
Unified Schemes for Radio-Loud Active Galactic Nuclei journal June 1995
When Is BL Lac Not a BL Lac? journal October 1995
The emission line spectrum of active galactic nuclei and the unifying scheme journal June 2000
Spectroscopy of 26 QSO candidates from the Jodrell Bank 966-MHz survey journal November 1984
Spectroscopy of 33 QSO candidates from the Jodrell Bank 966-MHz survey journal September 1982
The milliarcsecond structure of highly variable radio sources journal June 1992
Redshifts of southern radio sources. VII journal April 1988
The FIRST Bright Quasar Survey. II. 60 Nights and 1200 Spectra Later
  • White, Richard L.; Becker, Robert H.; Gregg, Michael D.
  • The Astrophysical Journal Supplement Series, Vol. 126, Issue 2 https://doi.org/10.1086/313300
journal February 2000
Studies of broad emission line profiles in QSOs - II. Properties of a large, predominantly radio selected sample journal January 1986
An Atlas of QSO Spectra journal January 1983
Studies of new complete samples of quasi-stellar radio sources from the 4C and Parkes catalogs journal March 1978
Spectroscopy of objects near Texas radio-source positions. journal June 1974
Spectroscopy of 206 QSO candidates and radio galaxies. journal May 1976
A study of a representative sample of flat-spectrum radio sources journal December 1983
New redshifts of radio sources from the S4 and S5 surveys journal August 1994
Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies journal November 2008
The sixth data release of the sloan digital sky survey text January 2008
The FIRST-2MASS Red Quasar Survey text January 2007
CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates text January 2007
A Connection Between Apparent VLBA Jet Speeds and Initial Active Galactic Nucleus Detections Made by the Fermi Gamma-ray Observatory text January 2009
Optical Spectroscopy of Bright Fermi LAT Blazars text January 2009
Magellan Spectroscopy of Low-Redshift Active Galactic Nuclei text January 2009
TeV BL Lac objects at the dawn of the Fermi era text January 2009
The Spectral Energy Distribution of Fermi bright blazars text January 2009
PKS 1502+106: a new and distant gamma-ray blazar in outburst discovered by the Fermi Large Area Telescope text January 2009
The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope text January 2010
Radio/gamma-ray time delay in the parsec-scale cores of active galactic nuclei text January 2010
Characteristics of Gamma-Ray Loud Blazars in the VLBA Imaging and Polarimetry Survey text January 2010
Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program text January 2010
Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources text January 2010
Fermi Large Area Telescope Observations of the Active Galaxy 4C +55.17: Steady, Hard Gamma-Ray Emission and its Implications text January 2011
The CORALS Survey I: New Estimates of the Number Density and Gas Content of Damped Lyman Alpha Systems Free from Dust Bias text January 2001
Optical Identification of the ASCA Medium Sensitivity Survey in the Northern Sky: Nature of Hard X-ray-selected Luminous Active Galactic Nuclei text January 2003
Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei III. Kinematics of Parsec-Scale Radio Jets text January 2004
The Second Data Release of the Sloan Digital Sky Survey text January 2004
The Third Data Release of the Sloan Digital Sky Survey text January 2004
Observations of the BL Lac Object 3C 66A with STACEE text January 2005
Spectroscopic monitoring of the BL Lac object AO 0235+164 text January 2007
The Molonglo Reference Catalog 1-Jy radio source survey IV. Optical spectroscopy of a complete quasar sample text January 1999

Cited By (29)

Radio and gamma-ray properties of extragalactic jets from the TANAMI sample journal May 2016
A sample of weak blazars at milli-arcsecond resolution journal April 2015
TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry: II. Additional sources journal February 2018
Mojave. x. Parsec-Scale jet Orientation Variations and Superluminal Motion in Active Galactic Nuclei journal October 2013
THE IMPORTANCE OF JET BENDING IN GAMMA-RAY AGNs—REVISITED journal March 2014
REFINING THE ASSOCIATIONS OF THE FERMI LARGE AREA TELESCOPE SOURCE CATALOGS journal February 2015
The awakening of BL Lacertae: observations by Fermi, Swift and the GASP-WEBT★ journal October 2013
A simplified view of blazars: the γ-ray case journal March 2013
Investigating the peculiar emission from the new VHE gamma-ray source H1722+119 journal March 2016
Simulations of AGN jets: magnetic kink instability versus conical shocks journal May 2017
MOJAVE – XIV. Shapes and opening angles of AGN jets journal April 2017
The GENJI Programme: Gamma-Ray Emitting Notable AGN Monitoring by Japanese VLBI journal April 2013
VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA): Evaluation of imaging capability journal December 2014
STAR FORMATION IN 3CR RADIO GALAXIES AND QUASARS AT z < 1 journal April 2016
MOJAVE. XIII. PARSEC-SCALE AGN JET KINEMATICS ANALYSIS BASED ON 19 YEARS OF VLBA OBSERVATIONS AT 15 GHz journal June 2016
The Radio/Gamma Connection of Blazars from High to Low Radio Frequencies journal December 2018
MOJAVE. XV. VLBA 15 GHz Total Intensity and Polarization Maps of 437 Parsec-scale AGN Jets from 1996 to 2017 journal January 2018
Optical polarization of high-energy BL Lacertae objects journal December 2016
WHY HAVE MANY OF THE BRIGHTEST RADIO-LOUD BLAZARS NOT BEEN DETECTED IN GAMMA-RAYS BY FERMI ? journal August 2015
MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-loud Blazars journal March 2019
CONTEMPORANEOUS VLBA 5 GHz OBSERVATIONS OF LARGE AREA TELESCOPE DETECTED BLAZARS journal December 2011
Investigating the peculiar emission from the new VHE gamma-ray source H1722+119 text January 2016
J0906+6930: a radio-loud quasar in the early Universe journal February 2017
The Properties of Parsec-scale Blazar Jets journal January 2019
MOJAVE XVI: Multiepoch Linear Polarization Properties of Parsec-scale AGN Jet Cores journal August 2018
Radio-to-gamma-ray Monitoring of the Narrow-Line Seyfert 1 Galaxy PMN J0948+0022 from 2008 to 2011 text January 2012
A Tight Connection between Gamma-Ray Outbursts and Parsec-Scale Jet Activity in the Quasar 3C 454.3 text January 2013
J0906+6930: a radio-loud quasar in the early Universe text January 2017
MOJAVE XVI: Multi-Epoch Linear Polarization Properties of Parsec-Scale AGN Jet Cores text January 2018


Similar Records

{gamma}-RAY AND PARSEC-SCALE JET PROPERTIES OF A COMPLETE SAMPLE OF BLAZARS FROM THE MOJAVE PROGRAM
Journal Article · Sun Nov 20 00:00:00 EST 2011 · Astrophysical Journal · OSTI ID:1356784

The Spectral Energy Distribution of Fermi bright blazars
Journal Article · Thu May 13 00:00:00 EDT 2010 · The Astrophysical Journal · OSTI ID:1356784

THE SPECTRAL ENERGY DISTRIBUTION OF FERMI BRIGHT BLAZARS
Journal Article · Thu Jun 10 00:00:00 EDT 2010 · Astrophysical Journal · OSTI ID:1356784