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List of works by Gordon T. Richards

A Feature at [CLC][ITAL]z[/ITAL][/CLC] ∼ 3.2 in the Evolution of the L[CLC]y[/CLC]α Forest Optical Depth

scientific article

A Large, Uniform Sample of X-Ray-emitting AGNs: Selection Approach and an Initial Catalog from theROSATAll-Sky and Sloan Digital Sky Surveys

scientific article published in Astronomical Journal

A Large, Uniform Sample of X-Ray-emitting Active Galactic Nuclei from theROSATAll Sky and Sloan Digital Sky Surveys: The Data Release 5 Sample

scientific article published in Astronomical Journal

A SURVEY OF z ∼ 6 QUASARS IN THE SLOAN DIGITAL SKY SURVEY DEEP STRIPE. II. DISCOVERY OF SIX QUASARS AT zAB>21

scientific article published in Astronomical Journal

A SURVEY OFz∼ 6 QUASARS IN THE SLOAN DIGITAL SKY SURVEY DEEP STRIPE. I. A FLUX-LIMITED SAMPLE ATzAB< 21

scientific article published in Astronomical Journal

A Spectroscopic Survey of Faint Quasars in the SDSS Deep Stripe. I. Preliminary Results from the Co-added Catalog

scientific article published in Astronomical Journal

A Survey of z > 5.7 Quasars in the Sloan Digital Sky Survey. II. Discovery of Three Additional Quasars at z > 6

scientific article published in Astronomical Journal

A Survey of z > 5.7 Quasars in the Sloan Digital Sky Survey. IV. Discovery of Seven Additional Quasars

scientific article published in Astronomical Journal

A Survey of z > 5.8 Quasars in the Sloan Digital Sky Survey. I. Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at z ∼ 6

scientific article published in Astronomical Journal

A gravitationally lensed quasar with quadruple images separated by 14.62 arcseconds

scientific article published in Nature

A multiwavelength study of binary quasars and their environments ⬇️

scientific article published in the Astrophysical Journal

A population of X-ray weak quasars: PHL 1811 analogs at high redshift ⬇️

scientific article published in the Astrophysical Journal

AGN Populations in Large-volume X-Ray Surveys: Photometric Redshifts and Population Types Found in the Stripe 82X Survey

scientific article published in the Astrophysical Journal

An Empirical Calibration of the Completeness of the SDSS Quasar Survey

scientific article published in Astronomical Journal

An Observational Determination of the Bolometric Quasar Luminosity Function ⬇️

scientific article published in the Astrophysical Journal

Analysis of Systematic Effects and Statistical Uncertainties in Angular Clustering of Galaxies from Early Sloan Digital Sky Survey Data ⬇️

scientific article published in the Astrophysical Journal

Analyzing the flux anomalies of the large-separation lensed quasar SDSS J1029+2623 ⬇️

article

Astrometric redshifts for quasars

scientific article

Average Properties of a Large Sample ofzabs∼zemAssociated MgiiAbsorption Line Systems ⬇️

scientific article published in the Astrophysical Journal

BAL and non-BAL quasars: continuum, emission, and absorption properties establish a common parent sample ⬇️

scholarly article

Bayesian high-redshift quasar classification from optical and Mid-IR photometry ⬇️

scholarly article

Candidate Type II Quasars from the Sloan Digital Sky Survey. I. Selection and Optical Properties of a Sample at 0.3<Z<0.83

scientific article published in Astronomical Journal

ChandraObservations of Red Sloan Digital Sky Survey Quasars

scientific article published in Astronomical Journal

ChandraObservations of SDSS J1004+4112: Constraints on the Lensing Cluster and Anomalous X‐Ray Flux Ratios of the Quadruply Imaged Quasar ⬇️

scientific article published in the Astrophysical Journal

Characterizing quasars in the mid-infrared: high signal-to-noise ratio spectral templates

scientific article

Close companions to two high-redshift quasars ⬇️

scientific article published in Astronomical Journal

Colors of 2625 Quasars at 0 < z < 5 Measured in the Sloan Digital Sky Survey Photometric System*

scientific article published in Astronomical Journal

Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications

scientific article (publication date: 13 June 2008)

Composite Quasar Spectra from the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

Connecting the X-ray properties of weak-line and typical quasars: testing for a geometrically thick accretion disk

scientific article

C iv emission-line properties and systematic trends in quasar black hole mass estimates ⬇️

article

Detection of Cosmic Magnification with the Sloan Digital Sky Survey ⬇️

scientific article published in the Astrophysical Journal

Detection of rest-frame optical lines from X-shooter spectroscopy of weak emission line quasars ⬇️

scientific article published in the Astrophysical Journal

Discovery of Two Gravitationally Lensed Quasars with Image Separations of 3″ from the Sloan Digital Sky Survey ⬇️

scientific article published in the Astrophysical Journal

Discovery of a Fifth Image of the Large Separation Gravitationally Lensed Quasar SDSS J1004+4112

Dust Reddening in Sloan Digital Sky Survey Quasars

scientific article published in Astronomical Journal

Dust-free quasars in the early Universe

scientific article published in Nature

ERRATUM: “THE EIGHTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST DATA FROM SDSS-III” (2011, ApJS, 193, 29)

article

Erratum: Finding rare AGN:XMM–NewtonandChandraobservations of SDSS Stripe 82

scholarly article published in Monthly Notices of the Royal Astronomical Society

Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z = 6.28 Quasar

scientific article published in Astronomical Journal

Exploring the link between C <scp>iv</scp> outflow kinematics and sublimation-temperature dust in quasars

scientific article published on 12 December 2020

Finding rare AGN: X-ray number counts of Chandra sources in Stripe 82

scientific article

Finding rare AGN: XMM–Newton and Chandra observations of SDSS Stripe 82

scientific article

High Signal-to-Noise Ratio Mid-Infrared Quasar Spectral Templates ⬇️

High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data. IV. Luminosity Function from the Fall Equatorial Stripe Sample

scientific article published in Astronomical Journal

High-redshift Extremely Red Quasars in X-Rays

scientific article published in the Astrophysical Journal

High-redshift SDSS quasars with weak emission lines ⬇️

scientific article published in the Astrophysical Journal

Kinematics of C iv and [O iii] emission in luminous high-redshift quasars

scientific article

L Dwarfs Found in Sloan Digital Sky Survey Commissioning Data. II. Hobby-Eberly Telescope Observations

scientific article published in Astronomical Journal

Mass Functions of the Active Black Holes in Distant Quasars from the Sloan Digital Sky Survey Data Release 3 ⬇️

scientific article published in the Astrophysical Journal

Mean spectral energy distributions and bolometric corrections for luminous quasars

scientific paper

Narrow, intrinsic C iv absorption in quasars as it relates to outflows, orientation, and radio properties

scholarly article

Observations and Theoretical Implications of the Large‐Separation Lensed Quasar SDSS J1004+4112 ⬇️

scientific article published in the Astrophysical Journal

On R-W1 as a diagnostic to discover obscured active galactic nuclei in wide-area X-ray surveys ⬇️

scientific article published in the Astrophysical Journal

On the populations of radio galaxies with extended morphology at z < 0.3 ⬇️

scientific article published in the Astrophysical Journal

Optical and Radio Properties of Extragalactic Sources Observed by the FIRST Survey and the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

Probing the Evolution of Infrared Properties ofz~ 6 Quasars:SpitzerObservations

scientific article published in Astronomical Journal

Quasar classification using color and variability ⬇️

scientific article published in the Astrophysical Journal

Quasars in the Cosmic Environment

scientific article published in 2012

Quasars: The Observational Perspectives

SDSS J024634.11-082536.2: a new gravitationally lensed quasar from the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

SDSS J092455.87+021924.9: an interesting gravitationally lensed quasar from the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

SDSS J102111.02+491330.4: a newly discovered gravitationally lensed quasar

scientific article published in Astronomical Journal

SDSS J1029+2623: a gravitationally lensed quasar with an image separation of 22".5 ⬇️

scientific article published in the Astrophysical Journal

SDSS J1335+0118: A New Two-Image Gravitational Lens

SDSS-III: massive spectroscopic surveys of the distant universe, the Milky Way, and extra-solar planetary systems

scientific article published in Astronomical Journal

SEGUE: a spectroscopic survey of 240,000 stars with g = 14-20

scientific article published in Astronomical Journal

Seoul National University Bright Quasar Survey in Optical (SNUQSO). I. First Phase Observations and Results

scientific article

Sloan Digital Sky Survey Imaging of Low Galactic Latitude Fields: Technical Summary and Data Release

scientific article published in Astronomical Journal

Sloan Digital Sky Survey: Early Data Release

scientific article published in Astronomical Journal

SpIES: THESPITZERIRAC EQUATORIAL SURVEY ⬇️

article

Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars

article by Gordon T. Richards et al published October 2006 in The Astrophysical Journal Supplement Series

Steep Hard-X-Ray Spectra Indicate Extremely High Accretion Rates in Weak Emission-line Quasars

scientific article published in the Astrophysical Journal

THEz= 5 QUASAR LUMINOSITY FUNCTION FROM SDSS STRIPE 82 ⬇️

scientific article published in the Astrophysical Journal

The 2dF-SDSS LRG and QSO (2SLAQ) Survey: thez< 2.1 quasar luminosity function from 5645 quasars tog= 21.85

article

The 2dF-SDSS LRG and QSO Survey: the spectroscopic QSO catalogue

article

The 2dF–SDSS LRG and QSO survey: the QSO luminosity function at 0.4 < z < 2.6

article

The 31 deg^2^ release of the Stripe 82 X-ray survey: the point source catalog ⬇️

scientific article published in the Astrophysical Journal

The Chandra view of the largest quasar lens SDSS J1029+2623 ⬇️

scientific article published in the Astrophysical Journal

The Clustering of High-redshift (2.9 ≤ z ≤ 5.1) Quasars in SDSS Stripe 82

scientific article published in the Astrophysical Journal

The Fifth Data Release of the Sloan Digital Sky Survey

article

The First Data Release of the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

The Fourth Data Release of the Sloan Digital Sky Survey

article

The Hidden Fortress: structure and substructure of the complex strong lensing cluster SDSS J1029+2623

scientific article

The Hunt for Red Quasars: Luminous Obscured Black Hole Growth Unveiled in the Stripe 82 X-Ray Survey

scientific article published in the Astrophysical Journal

The Physical Properties of Low-redshift FeLoBAL Quasars. III. The Location and Geometry of the Outflows

scientific article published in 2022

The Radio‐Loud Fraction of Quasars is a Strong Function of Redshift and Optical Luminosity ⬇️

scientific article published in the Astrophysical Journal

The SDSS-III Baryon Oscillation Spectroscopic Survey: quasar target selection for data release nine

article

The SDSS-III Baryon Oscillation Spectroscopic Survey: the quasar luminosity function from Data Release nine ⬇️

scientific article published in the Astrophysical Journal

The Second Data Release of the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

The Sixth Data Release of the Sloan Digital Sky Survey

scientific article published in 2008

The Sloan Digital Sky Survey QSO absorption line catalogue

article

The Sloan Digital Sky Survey Quasar Catalog. I. Early Data Release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Catalog. II. First Data Release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Catalog. III. Third Data Release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical lens sample from the third Data Release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on dark energy from the third Data Release quasar lens catalog

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Lens Search. IV. Statistical lens sample from the fifth data release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Quasar Survey: Quasar Luminosity Function from Data Release 3

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey Reverberation Mapping Project: The C iv Blueshift, Its Variability, and Its Dependence Upon Quasar Properties

scholarly article published on 20 February 2018

The Sloan Digital Sky Survey Reverberation Mapping project: technical overview ⬇️

scientific article

The Sloan Digital Sky Survey Stripe 82 imaging data: depth-optimized co-adds over 300 deg^2^ in five filters ⬇️

scholarly article

The Sloan Digital Sky Survey quasar catalog. V. Seventh data release

scientific article published in Astronomical Journal

The Sloan Digital Sky Survey reverberation mapping project: ensemble spectroscopic variability of quasar broad emission lines ⬇️

scientific article published in the Astrophysical Journal

The Sloan Digital Sky Survey reverberation mapping project: first broad-line H{beta} and Mg II lags at z >~ 0.3 from six-month spectroscopy ⬇️

scientific article published in the Astrophysical Journal

The Sloan Digital Sky Survey reverberation mapping project: velocity shifts of quasar emission lines ⬇️

scientific article published in the Astrophysical Journal

The Sloan Digital Sky Survey: Technical Summary

scientific article published in Astronomical Journal

The Third Data Release of the Sloan Digital Sky Survey

scientific article published in Astronomical Journal

The Third Image of the Large-Separation Lensed Quasar SDSS J1029+2623 ⬇️

scientific article published in the Astrophysical Journal

The Ultraviolet, Optical, and Infrared Properties of Sloan Digital Sky Survey Sources Detected by GALEX

scientific article published in Astronomical Journal

The baryon oscillation spectroscopic survey of SDSS-III

scientific article published in Astronomical Journal

The bolometric quasar luminosity function at z = 0–7

scientific article

The discovery of the first "changing look" quasar: new insights into the physics and phenomenology of active galactic nucleus ⬇️

scientific article published in the Astrophysical Journal

The eighth data release of the Sloan Digital Sky Survey: first data from SDSS-III

scientific article published in 2011

The host galaxies of active galactic nuclei

scientific article published in January 2003

The ninth data release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III baryon oscillation spectroscopic survey

scientific article published in November 2012

The seventh data release of the Sloan Digital Sky Survey

scientific article published in 2009

VLT Optical and Near-Infrared Observations of the z = 6.28 Quasar SDSS J1030+0524

scientific article published in Astronomical Journal

Weak line quasars at high redshift: extremely high accretion rates or anemic broad-line regions? ⬇️

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