A Catalog of Quasar Properties from SDSS DR7

Abstract

We present a compilation of properties of the 105,783 quasars in the SDSS Data Release 7 (DR7) quasar catalog. In this value-added product, we compile continuum and emission line measurements around the Halpha, Hbeta, MgII and CIV regions, as well as other quantities such as radio properties, broad absorption line quasar (BALQSO) flags, and disk emitters. We also compile virial black hole mass estimates based on various calibrations. For the fiducial virial mass estimates we use the Vestergaard & Peterson (VP06) calibrations for Hbeta and CIV, and our own calibration for MgII which matches the VP06 Hbeta masses on average. We describe the construction of this catalog, and discuss its limitations. The catalog and its future updates will be made publicly available online.

Updated the paper and the catalog; ApJS in press. The catalog can be accessed at https://www.cfa.harvard.edu/~yshen/BH_mass/dr7.htm

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• Multiwavelength analysis and the C IV λ1549 Å emission line behavior from 2008 to 2020 of the FSRQ B2 1633+382
• The XMM-Newton Bright Survey sample of absorbed quasars: X-ray and accretion properties
• Selection of Burst-like Transients and Stochastic Variables Using Multi-Band Image Differencing in the Pan-STARRS1 Medium-Deep Survey
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• A candidate of binary black hole system in AGN with broad Balmer emission lines having quite different line widths
• High Star Formation Rates of Low Eddington Ratio Quasars at $z\gtrsim 6$
• Submm-bright X-ray absorbed QSOs at z~2: insights into the co-evolution of AGN and star-formation
• On The Fine Tuning and Physical Origin of Line-Locked Absorption Systems in Active Galaxies
• The dust, nebular emission and dependence on QSO radio properties of the associated Mg II absorption line systems
• Evaluating and Improving the Redshifts of z>2.2 Quasars
• Observational nonstationarity of AGN variability: The only way to go is down!
• A Closer Look at Two of the Most Luminous Quasars in the Universe
• How Similar are the Properties of Quasars with Nearly Identical Ultraviolet Spectra?
• A Systematic Analysis of Stellar Populations in the Host Galaxies of SDSS Type I QSOs
• The Mass Distribution of Quasars in Optical Time-domain Surveys
• A novel Bayesian approach for decomposing the radio emission of quasars: II. Link between quasar radio emission and black hole mass
• Modelling the variable emission states of $\gamma$-ray emitting Narrow-Line Seyfert 1 galaxies
• Examining AGN UV/Optical Variability Beyond the Simple Damped Random Walk. II. Insights from 22 Years Observations of SDSS, PS1 and ZTF
• VLA Snapshot Continuum Survey of FRI Quasar Candidates Selected from the LOFAR Two-Metre Sky Survey (LoTSS)
• A Sample Bias in Quasar Variability Studies
• Breaking the rules at $z\simeq$0.45: the rebel case of RBS 1055
• High-$z$ Universe probed via Lensing by QSOs (HULQ) I. Number Estimates of QSO-QSO and QSO-Galaxy Lenses
• An Optically Faint Quasar Survey at z~5 in the CFHTLS Wide Field: Estimates of the Black Hole Masses and Eddington Ratios
• Nonparametric Methods in Astronomy: Think, Regress, Observe -- Pick Any Three
• Exploring the Connection between UV/Optical Variations and Radio Emission in Radio-Quiet Quasars: Clues on Radio Emission Origin
• A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
• The ${\sigma }_{\mathrm{H}\beta }$-based dimensionless accretion rate and its connection with the corona for AGN
• Tracing Quasar Narrow-Line Regions Across Redshift: A Library of High S/N Optical Spectra
• Location of gamma-ray flaring region in quasar 4C +21.35
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• The mid-infrared variability of the SDSS optical quasars
• Monster radio jet (>66 kpc) observed in quasar at z$\sim$5
• HYPERION: broad-band X-ray-to-near-infrared emission of Quasars in the first billion years of the Universe
• Probing the He II re-Ionization ERa via Absorbing C IV Historical Yield (HIERACHY) I: A Strong Outflow from a z~4.7 Quasar
• Radio Dichotomy in Quasars with H$\beta$ FWHM greater than $15,000$ km\,s${}^{-1}$
• Orientation effects on the near-infrared broad band emission of quasars
• Awakening of The High Redshift Blazar CGRaBS J0809+5341
• The detections of inflowing gas from narrow absorption lines at the parsec scale
• The Performance of Photometric Reverberation Mapping at High Redshift and the Reliability of Damped Random Walk Models
• BH Mass, Jet and Accretion Disk Connection: An Analysis of Radio-loud and Radio-quiet Quasars
• The relation between quasars' optical spectra and variability
• The Variability of the Narrow-line Seyfert 1 Galaxies from the PanSTARRS's View
• X-ray properties of high-redshift Radio Loud and Radio Quiet Quasars observed by Chandra
• The MEXSAS2 Sample and the Ensemble X-ray Variability of Quasars
• The comparison of optical variability of broad-line Seyfert 1 and narrow-line Seyfert 1 galaxies from the view of Pan-STARRS
• Uncertainty Quantification of the Virial Black Hole Mass with Conformal Prediction
• Central Engine and Spectral Energy Distribution Properties of High Redshift Gamma Ray Blazars
• Multiband optical variability on diverse timescales of the blazar Ton 599 from 2011 to 2023
• Properties of Very Broad Line MgII Radio-Loud and Radio-Quiet Quasars
• H1821+643: The most X-ray and infrared luminous AGN in the Swift/BAT survey in the process of rapid stellar and supermassive black hole mass assembly
• Ensemble Mapping the Inner Structure of Luminous Quasars
• The Galaxy Activity, Torus, and Outflow Survey (GATOS). Black hole mass estimation using machine learning
• The black hole masses of extremely luminous radio-WISE selected galaxies
• HARMONI view of the host galaxies of active galactic nuclei around cosmic noon: Resolved stellar morpho-kinematics and the M${}_{BH}$-${\sigma }_{\star }$ relation
• The environment of QSO triplets at 1 $\lesssim$ z $\lesssim$ 1.5
• AGN in the ULIRG HE 0435-5304
• The Nature of LoBAL QSOs: II. HST/WFC3 Observations Reveal Host Galaxies Dominated by Mergers
• On the Power to Constrain the Accretion History of Massive Black Holes via Spin Measurements by Upcoming X-Ray Telescopes
• The Quasar Candidates Catalogs of DESI Legacy Imaging Survey Data Release 9
• The broad band SEDs of four 'hypervariable' AGN
• Cosmic quenching and scaling laws for the evolution of supermassive black holes and host galaxies
• Fe II velocity shifts in optical spectra of type 1 AGN
• The Energetics of the Central Engine in the Powerful Quasar, 3C298
• Multi-phase investigation of outflows in the circumgalactic and interstellar media of luminous quasars at z~5
• The ensemble broad-frequency power spectrum of Stripe-82 quasars from multiple surveys
• Far-UV Fe Emission as Proxy of Eddington Ratios
• AGNet: Weighing Black Holes with Machine Learning
• Optical Spectroscopy of Four Young Radio Sources
• Dusty Quasars at High Redshifts
• Large-scale environments of star-forming active galactic nuclei: How black hole mass, accretion rate, and luminosity connect to dark matter halos
• PHL 6625: A Minor Merger-Associated QSO Behind NGC 247
• Spectral Energy Distribution Modeling of Broad Emission Line Quasars: From X-ray to Radio Wavelengths
• AGN obscuration in optical and X-rays: Host properties and the interplay of nuclear and galactic gas and dust in a combined SDSS-XMM sample
• The physical properties of candidate neutrino-emitter blazars
• Gaia-supported re-discovery of a remarkable weak line quasar from a variability and proper motion survey
• Broadband nuclear emission in two radio-loud BAL quasars
• Hosts and environments: a (large-scale) radio history of AGN and star-forming galaxies
• Narrow lines correlations in an SDSS sample of type 1 quasars
• High-$z$ Universe probed via Lensing by QSOs (HULQ) II. Deep GMOS spectroscopy of a QSO lens candidate
• Testing [O II] $\lambda 3727$ as a Star Formation Rate Tracer in Quasar Host Galaxies
• Strong correlation between FeII/MgII ratio and Eddington ratio of type 1 Active galactic nuclei
• Slim accretion disks: theory and observational consequences
• The Relationship Between Emission Line and Continuum Luminosity and the Baldwin Effect in Blazars. I. The Case of the Mg II λ2798 Å Emission Line
• Understanding the Nature of an Unusual Post-Starburst Quasar with Exceptionally Strong Ne V Emission
• Can X-ray Observations Improve Optical-UV-based Accretion-Rate Estimates for Quasars?
• OISTER Optical and Near-Infrared Monitoring Observations of a Peculiar Radio-Loud Active Galactic Nucleus SDSS J110006.07+442144.3
• Near-infrared spectroscopy of extreme BAL QSOs from the QUBRICS bright quasar survey
• Reverberation Mapping of Two Luminous Quasars: the Broad-line Region Structure and Black Hole Mass
• The physical relation between disc and coronal emission in quasars
• Spectroscopic confirmation of dual and offset quasars from the Subaru HSC-SSP program
• The possible long-term periodic variability of the extremely luminous quasar WISE J090924.01+000211.1
• BH masses in NLS1: the role of the broad-line region geometry