The SDSS Quasar Survey: Quasar Luminosity Function from Data Release Three

Abstract

We determine the number counts and z=0-5 luminosity function for a well-defined, homogeneous sample of quasars from the Sloan Digital Sky Survey (SDSS). We conservatively define the most uniform statistical sample possible, consisting of 15,343 quasars within an effective area of 1622 deg^2 that was derived from a parent sample of 46,420 spectroscopically confirmed broad-line quasars in the 5282 deg^2 of imaging data from SDSS Data Release Three. The sample extends from i=15 to i=19.1 at z<3 and to i=20.2 for z>3. The number counts and luminosity function agree well with the results of the 2dF QSO Survey, but the SDSS data probe to much higher redshifts than does the 2dF sample. The number density of luminous quasars peaks between redshifts 2 and 3, although uncertainties in the selection function in this range do not allow us to determine the peak redshift more precisely. Our best fit model has a flatter bright end slope at high redshift than at low redshift. For z<2.4 the data are best fit by a redshift-independent slope of beta = -3.1 (Phi(L) propto L^beta). Above z=2.4 the slope flattens with redshift to beta=-2.37 at z=5. This slope change, which is significant at a >5-sigma level, must be accounted for in models of the evolution of accretion onto supermassive black holes.

57 pages, 21 figures (9 color); minor changes to reflect the version accepted by AJ; higher resolution version available at ftp://ftp.astro.princeton.edu/gtr/dr3qlf/Feb1306/

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• Mean and Extreme Radio Properties of Quasars and the Origin of Radio Emission
• The Presence of Weak Active Galactic Nuclei in High Redshift Star Forming Galaxies
• Massive Star-Forming Host Galaxies of Quasars on Sloan Digital Sky Survey Stripe 82
• Deep Extragalactic VIsible Legacy Survey (DEVILS): Identification of AGN through SED Fitting and the Evolution of the Bolometric AGN Luminosity Function
• Luminosity dependent clustering of star-forming BzK galaxies at redshift 2
• Cosmic evolution of low-excitation radio galaxies in the LOFAR Two-meter Sky Survey Deep Fields
• Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam wide field imaging
• Is there a maximum mass for black holes in galactic nuclei?
• On the faint end of the high redshift AGN luminosity function
• The UV Properties of SDSS Selected Quasars
• The molecular gas content in obscured AGN at z > 1
• The spatial clustering of ROSAT All-Sky Survey Active Galactic Nuclei IV. More massive black holes reside in more massive dark matter halos
• The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: the 4th and 5th Data Release
• Dust Reddened Quasars in FIRST and UKIDSS: Beyond the Tip of the Iceberg
• What produces the far-infrared/submm emission in the most luminous QSOs?
• Orientation effects on spectral emission features of quasars
• An X-ray and Multiwavelength Survey of Highly Radio-Loud Quasars at z > 4: Jet-Linked Emission in the Brightest Radio Beacons of the Early Universe
• Tracing the evolution of Active Galactic Nuclei host galaxies over the last 9 Gyrs of Cosmic time
• Modeling Mid-Infrared Diagnostics of Obscured Quasars and Starbursts
• The 700 ks Chandra Spiderweb Field I: evidence for widespread nuclear activity in the Protocluster
• Determining Quasar Black Hole Mass Functions from their Broad Emission Lines: Application to the Bright Quasar Survey
• Molecular Gas in Submillimetre-Faint, Star-Forming Ultraluminous Galaxies at z>1
• Non-Gaussianity and large-scale structure in a two-field inflationary model
• The Sloan Digital Sky Survey Quasar Lens Search. IV. Statistical Lens Sample from the Fifth Data Release
• The Intrinsic Fractions and Radio Properties of Low Ionization Broad Absorption Line Quasars
• Observational constraints on the co-evolution of supermassive black holes and galaxies
• The Faint End of the Quasar Luminosity Function at z~4
• A Preferential Growth Channel for Supermassive Black Holes in Elliptical Galaxies at z<2
• A Search for Kilonovae in the Dark Energy Survey
• Polar dust obscuration in broad-line active galaxies from the XMM-XXL field
• Dust Reverberation Mapping in Distant Quasars from Optical and Mid-Infrared Imaging Surveys
• Discovery of a Probable Physical Triple Quasar
• A spectroscopic follow-up program of very massive galaxies at 3<z<4: confirmation of spectroscopic redshifts, and a high fraction of powerful AGN
• Evidence for the Thermal Sunyaev-Zel'dovich Effect Associated with Quasar Feedback
• Variability-selected active galactic nuclei from supernova search in the Chandra deep field south
• Delayed triggering of radio Active Galactic Nuclei in gas-rich minor mergers in the local Universe
• Modelling the cosmic spectral energy distribution and extragalactic background light over all time
• Discovery of a Radio-Selected z ~ 6 Quasar
• The roles of star formation and AGN activity of IRS sources in the HerMES fields
• Dust Biasing of Damped Lyman Alpha Systems: a Bayesian Analysis
• On the discovery of stars, quasars, and galaxies in the Southern Hemisphere with S-PLUS DR2
• Faint-end Quasar Luminosity Functions from Cosmological Hydrodynamic Simulations
• Black Hole Mass Estimates and Rapid Growth of Supermassive Black Holes in Luminous $z\sim$ 3.5 Quasars
• The Sloan Digital Sky Survey Reverberation Mapping Project: Post-Starburst Signatures in Quasar Host Galaxies at z < 1
• $f(R)$ gravity theories in the Palatini Formalism constrained from strong lensing
• Finding Rare AGN: X-ray Number Counts of Chandra Sources in Stripe 82
• The Chandra X-ray point source catalog in the DEEP2 Galaxy Redshift Survey fields
• The frequency of extreme X-ray variability of radio-quiet quasars
• The Extremely Luminous Quasar Survey in the Sloan Digital Sky Survey footprint. III. The South Galactic Cap Sample and the Quasar Luminosity Function at Cosmic Noon
• Two close Large Quasar Groups of size ~ 350 Mpc at z ~ 1.2
• An Investigation into the Effects of Luminosity on the Mid-Infrared Spectral Energy Distributions of Radio-Quiet Quasars
• The Extremely Luminous Quasar Survey (ELQS) in the SDSS footprint I.: Infrared Based Candidate Selection
• Helium Reionization Simulations. II. Signatures of Quasar Activity on the IGM
• Low redshift AGN in the Hamburg/ESO Survey: I. The local AGN luminosity function
• Impact of Relativistic Effects on the Primordial Non-Gaussianity Signature in the Large-Scale Clustering of Quasars
• Optical Images and Source Catalog of AKARI North Ecliptic Pole Wide Survey Field
• A glance at the host galaxy of high-redshift quasars using strong damped Lyman-alpha systems as coronagraphs
• AGN and their host galaxies in the local Universe: two mass independent Eddington ratio distribution functions characterize black hole growth
• X-ray Observations of Luminous Dusty Quasars at z > 2
• An ultra-luminous quasar at z=5.363 with a ten billion solar mass black hole and a Metal-Rich DLA at z~5
• Discovery of Radio Jets in z~2 ULIRGs with Deep 9.7um Silicate Absorption
• The Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Two and Three
• The Chandra COSMOS Legacy survey: the z>3 sample
• The Magellanic Quasars Survey. II. Confirmation of 144 New Active Galactic Nuclei Behind the Southern Edge of the Large Magellanic Cloud
• The Sloan Digital Sky Survey Reverberation Mapping Project: Comparison of Lag Measurement Methods with Simulated Observations
• The Pan-STARRS1 $\mathbf{z}>5.6$ Quasar Survey: III. The $\mathbf{z}\approx 6$ Quasar Luminosity Function
• A tale of two feedbacks: star-formation in the host galaxies of radio-AGN
• The Relative Role of Galaxy Mergers and Cosmic Flows in Feeding Black Holes
• Probing the Radio Loud/Quiet AGN dichotomy with quasar clustering
• A UV to Mid-IR Study of AGN Selection
• The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Six to Nine
• Strong MgII systems in quasar and gamma-ray burst spectra
• Galaxy density profiles and shapes -- I. simulation pipeline for lensing by realistic galaxy models
• Cosmic Evolution of Star Formation In SDSS Quasar Hosts Since z=1
• The peculiar optical spectrum of 4C+22.25: Imprint of a massive black hole binary?
• Clustering of infrared-bright dust-obscured galaxies revealed by the Hyper Suprime-Cam and WISE
• Constraints on the faint end of the quasar luminosity function at z~5 in the COSMOS field
• The Largest X-ray Selected Sample of z>3 AGNs: C-COSMOS & ChaMP
• The Magellanic Quasars Survey. I. Doubling the Number of Known AGNs Behind the Small Magellanic Cloud
• The White Dwarf Age of NGC 2477
• Astrometric Redshifts for Quasars
• Evidence for New Relations between Gamma Ray Burst Prompt and X-ray Afterglow Emission from 9 Years of Swift
• Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes
• The Large Sky Area Multi-Object Fiber Spectroscopic Telescope Quasar Survey: Quasar Properties from First Data Release
• The Sloan Digital Sky Survey Reverberation Mapping Project: Systematic Investigations of Short-Timescale CIV Broad Absorption Line Variability
• Radiative Efficiency of Disk Accretion in Individual SDSS QSOs
• Co-evolution of Extreme Star Formation and Quasar: hints from {\it Herschel} and the Sloan Digital Sky Survey
• A close quasar pair in a disk-disk galaxy merger at z = 2.17
• The role of the most luminous, obscured AGN in galaxy assembly at z~2
• Radio-Selected Quasars in the Sloan Digital Sky Survey
• What triggers black-hole growth? Insights from star formation rates
• Not So Heavy Metals: Black Hole Feedback Enriches The Circumgalactic Medium
• On The Survival and Abundance of Disk-dominated Galaxies
• The Impact of Mergers on the Survival and Abundance of Disk-Dominated Galaxies
• The mass function of black holes at 1<z<4.5: comparison of models with observations
• Galaxy Clusters, a Novel Look at Diffuse Baryons Withstanding Dark Matter Gravity
• The New Numerical Galaxy Catalogue (ν^2 GC): Properties of Active Galactic Nuclei and Their Host Galaxies
• The Optical and Near-Infrared Properties of 2837 Quasars in the UKIRT Infrared Deep Sky Survey (UKIDSS)
• Panchromatic Spectral Energy Distributions of Dusty Galaxies with RADISHE. I. Predictions for Herschel: Correlating Colors with Galactic Energy Sources
• Modeling Lyman continuum emission from young galaxies
• A new quadruple gravitational lens from the Hyper Suprime-Cam Survey: the puzzle of HSC~J115252+004733
• The RASS--6dFGS catalogue: a sample of X-ray selected AGN from the 6dF Galaxy Survey
• The environments of z~1 Active Galactic Nuclei at 3.6um
• Measuring large-scale structure with quasars in narrow-band filter surveys
• Bridging Star-Forming Galaxy and AGN Ultraviolet Luminosity Functions at $z=4$ with the SHELA Wide-Field Survey
• The High-z Quasar Hubble Diagram
• HST/NICMOS Imaging of Bright High-Redshift 24μm-selected Galaxies: Merging Properties
• Modelling of Lyman-alpha Emitting Galaxies and Ionized Bubbles at the Era of Reionization
• Optical properties of infrared-bright dust-obscured galaxies viewed with Subaru Hyper Suprime-Cam
• A Constraint on Quasar Clustering at z=5 from a Binary Quasar
• Evolution of active galactic nuclei
• The 2QDES Pilot : The luminosity and redshift dependence of quasar clustering
• Observing Supermassive Black Holes across cosmic time: from phenomenology to physics
• The Most Massive Black Holes in the Universe: Effects of Mergers in Massive Galaxy Clusters
• Early Black Holes in Cosmological Simulations: Luminosity Functions and Clustering Behaviour
• Discovery of an Extreme MeV Blazar with the Swift Burst Alert Telescope
• What controls the UV-to-X-ray continuum shape in quasars?
• The hyperluminous Compton-thick $z\sim 2$ quasar nucleus of the hot DOG W1835+4355 observed by NuSTAR
• Ultraviolet Emission-Line Correlations in Hubble/COS Spectra of Active Galactic Nuclei: Single-Epoch Black Hole Masses
• CO observations of high-z radio galaxies MRC 2104-242 and MRC 0943-242: spectral-line performance of the Compact Array Broadband Backend
• Search for primordial non-Gaussianity in the quasars of SDSS-III BOSS DR9
• A Study of Quasar Selection in the Dark Energy Survey Supernova fields
• A CO-rich merger shaping a powerful and hyper-luminous infrared radio galaxy at z=2: the Dragonfly Galaxy
• Extragalactic Background Light: Inventory of light throughout the cosmic history
• "Little red dots" cannot reside in the same dark matter halos as comparably luminous unobscured quasars
• The ChaMP Extended Stellar Survey (ChESS): Photometric and Spectroscopic Properties of Serendipitously Detected Stellar X-ray Sources
• Statistics of Galactic-Scale Quasar Pairs at Cosmic Noon
• The Geometry of the Infrared and X-ray Obscurer in a Dusty Hyperluminous Quasar
• First HETDEX Spectroscopic Determinations of Ly$\alpha$ and UV Luminosity Functions at $z=2-3$: Bridging a Gap Between Faint AGN and Bright Galaxies
• Where are the Cosmic Metals at z~3?
• A Chandra X-ray Survey of Optically Selected AGN Pairs
• ALMA reveals large overdensity and strong clustering of galaxies in quasar environments at $z\sim 4$
• The small observed scale of AGN--driven outflows, and inside--out disc quenching
• Tracing high redshift cosmic web with quasar systems
• Comoving Space Density and Obscured Fraction of High-Redshift Active Galactic Nuclei in the Subaru/{\it XMM-Newton} Deep Survey
• The clusters Abell~222 and Abell~223: a multi-wavelength view
• The relative growth of Optical and Radio Quasars in SDSS
• Why are AGN found in High Mass Galaxies?
• A Statistical Method for Estimating Luminosity Functions using Truncated Data
• Properties of Wide-separation Lensed Quasars by Clusters of Galaxies in the SDSS
• Observational evidence that positive and negative AGN feedback depends on galaxy mass and jet power
• CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE
• Constraining AGN triggering mechanisms through the clustering analysis of active black holes
• The Role of Star-Formation and AGN in Dust Heating of z=0.3-2.8 Galaxies - II. Informing IR AGN fraction estimates through simulations
• Downsizing of supermassive black holes from the SDSS quasar survey
• The Sunyaev-Zeldovich Effect from Quasar Feedback
• Placing High-Redshift Quasars in Perspective: a Catalog of Spectroscopic Properties from the Gemini Near Infrared Spectrograph -- Distant Quasar Survey
• An FMOS Survey of moderate-luminosity broad-line AGN in COSMOS, SXDS and E-CDF-S
• The spectral and environment properties of $z\sim 2.0-2.5$ quasar pairs
• Eight new quasars discovered by LAMOST in one extragalactic field
• Outskirts of Distant Galaxies In Absorption
• GAMA/DEVILS: Cosmic star formation and AGN activity over 12.5 billion years
• Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4
• Large-scale 3D mapping of the intergalactic medium using the Lyman Alpha Forest
• The Evolution of Active Galactic Nuclei in Warm Dark Matter Cosmology
• The Cosmic History of Black Hole Growth from Deep Multiwavelength Surveys
• Dusty Gas Accretion onto Massive Black Holes and Infrared Diagnosis of the Eddington Ratio
• HST Spectral Observations near the He II Ly-alpha Break: Implications for He II Reionization
• The co-evolution of black hole growth and star formation from a cross-correlation analysis between quasars and the cosmic infrared background
• Comparing Simple Quasar Demographics Models
• Suzaku observations of the type 2 QSO in the central galaxy of the Phoenix cluster
• The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes
• A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2
• Evidence for Merger-Driven Activity in the Clustering of High Redshift Quasars
• Use of neural networks for the identification of new z>=3.6 QSOs from FIRST-SDSS DR5
• The halo mass of optically-luminous quasars at z=1-2 measured via gravitational deflection of the cosmic microwave background
• A disc wind model for blueshifts in quasar broad emission lines
• On the relation between hard X-ray photon index versus accretion rate for super-Eddington accreting quasars
• Finding Quasars behind the Galactic Plane. II. Spectroscopic Identifications of 204 Quasars at $|b|<20°$
• A Mock Catalog of Gravitationally Lensed Quasars for the LSST Survey
• Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4
• The Extremely Luminous Quasar Survey (ELQS) in the Sloan Digital Sky Survey footprint. II. The North Galactic Cap Sample
• A Highly Magnified Gravitationally Lensed Red QSO at z = 2.5 with a Significant Flux Ratio Anomaly
• A Direct Measurement of the Mean Occupation Function of Quasars: Breaking Degeneracies between Halo Occupation Distribution Models
• The accretion of a solar mass per day by a 17-billion solar mass black hole
• The rapid transition from star-formation to AGN dominated rest-frame UV light at z ~ 4
• Helium Reionization Simulations. I. Modeling Quasars as Radiation Sources
• Faint COSMOS AGN at z~3.3 - I. Black Hole Properties and Constraints on Early Black Hole Growth
• Galaxy And Mass Assembly: the evolution of the cosmic spectral energy distribution from z = 1 to z = 0
• The influence of metagalactic ultra-violet background fluctuations on the high-redshift Ly$\alpha$ forest
• X-ray properties and obscured fraction of AGN in the J1030 Chandra field
• Passive and star-forming galaxies at $1.4\le z\le 2.5$ in the Aegis field
• The Infrared Medium-deep Survey. VI. Discovery of Faint Quasars at $z\sim 5$ with a Medium-band-based Approach
• Genuine Retrieval of the AGN Host Stellar Population (GRAHSP)
• Universality in the Random Walk Structure Function of Luminous Quasi-Stellar Objects
• Searching for luminous absorbed sources in the WISE AGN catalogue
• Constraining Star Formation and AGN in z~2 Massive Galaxies using High Resolution MERLIN Radio Observations
• Spectral Energy Distributions of Candidate Periodically-Variable Quasars: Testing the Binary Black Hole Hypothesis
• Is the dependence of spectral index on luminosity real in optically selected AGN samples?
• A New Model for Dark Matter Halos Hosting Quasars
• High-redshift quasars along the Main Sequence
• The Infrared Medium-deep Survey. IV. Low Eddington Ratio of A Faint Quasar at $z\sim 6$: Not Every Supermassive Black Hole is Growing Fast in the Early Universe
• Observational evidence favors a static universe
• Broad Iron Emission from Gravitationally Lensed Quasars Observed by Chandra
• The evolution of disc galaxies with and without classical bulges since z~1
• Lecture notes on black hole binary astrophysics
• On the Search for Quasar Light Echoes
• SMM J04135+10277: A distant QSO-starburst system caught by ALMA
• A very bright i=16.44 quasar in the `redshift desert' discovered by LAMOST
• Do broad absorption line quasars live in different environments from ordinary quasars?
• JWST ERS Program Q3D: The pitfalls of virial BH mass constraints shown in a z = 3 quasar with an ultramassive host
• The Stellar Mass - Black Hole Mass Relation at $z\sim 2$ Down to ${\mathcal{M}}_{\mathrm{BH}}\sim 10^7{M}_{\odot }$ Determined by HETDEX
• SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line
• One-Two Quench: A Double Minor Merger Scenario
• Discovery of a single faint AGN in a large sample of z>5 Lyman break galaxies
• Quasar clustering in a galaxy and quasar formation model based on ultra high-resolution N-body simulations
• Selection constraints on high redshift quasar searches in the VISTA kilo-degree infrared galaxy survey
• Seoul National University Bright Quasar Survey in Optical (SNUQSO) I: First Phase Observations and Results
• A novel Bayesian approach for decomposing the radio emission of quasars: I. Modelling the radio excess in red quasars
• The most luminous blue quasars at 3.0<z<3.3. II. CIV/X-ray emission and accretion disc physics
• Predictions of Quasar Clustering: Redshift, Luminosity and Selection Dependence
• The XXL Survey XIX. A realistic population of simulated X-ray AGN: Comparison of models with observations
• The Quasar-LBG Two-point Angular Cross-correlation Function at z ~ 4 in the COSMOS Field
• SMM J04135+10277: A Candidate Early-Stage "Wet-Dry" Merger of Two Massive Galaxies at z=2.8
• Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
• BAT AGN Spectroscopic Survey -- XIII. The nature of the most luminous obscured AGN in the low-redshift universe
• Narrow, Intrinsic CIV Absorption in Quasars as it Relates to Outflows, Orientation, and Radio Properties
• Imaging Spectroscopy of Ionized Gaseous Nebulae around Optically Faint AGN at Redshift z ~ 2
• Connecting Low- and High-Redshift Weak Emission-Line Quasars via HST Spectroscopy of Ly$\alpha$ Emission
• Revisiting the Extreme Clustering of $z\approx 4$ Quasars with Large Volume Cosmological Simulations
• Measuring the luminosity and virial black hole mass dependence of quasar-galaxy clustering at z ~ 0.8
• Discovering the missing 2.2<z<3 quasars by combining optical variability and optical/near-IR colors
• The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41
• Using the Properties of Broad Absorption Line Quasars to Illuminate Quasar Structure
• Magnitude and size evolution of bulgeless galaxies
• The spatial clustering of ROSAT all-sky survey Active Galactic Nuclei: V. The evolution of broad-line AGN clustering properties in the last 6 Gyr
• Early Science Result from the Japanese Virtual Observatory: AGN and Galaxy Clustering at z = 0.3 to 3.0
• SHARDS Frontier Fields: Physical properties of a low mass Lyman-alpha emitter at z=5.75
• A Multi-wavelength Analysis of Binary-AGN Candidate PSO J334.2028+01.4075
• Modeling active galactic nuclei: ongoing problems for the faint-end of the luminosity function
• On the small scale clustering of quasars: constraints from the MassiveBlack II simulation
• Dark-ages reionization and galaxy formation simulation -- XVIII. The high-redshift evolution of black holes and their host galaxies
• A Halo Occupation Interpretation Of Quasars At $z\sim 1.5$ Using Very Small Scale Clustering Information
• Correlated orientations of the axes of large quasar groups on Gpc scales
• A unifying evolutionary framework for infrared-selected obscured and unobscured quasar host haloes
• Herschel-ATLAS/GAMA: What determines the far-infrared properties of radio-galaxies?
• Measuring Lensing Magnification of Quasars by Large Scale Structure using the Variability-Luminosity Relation
• APEX at the QSO MUSEUM: molecular gas reservoirs associated with $z\sim$3 quasars and their link to the extended Ly$\alpha$ emission
• The optically-selected 1.4-GHz quasar luminosity function below 1 mJy
• The X-ray Luminosity Function Evolution of Quasars and the Correlation Between the X-ray and Ultraviolet Luminosities
• Near-infrared spectroscopy of a nitrogen-loud quasar SDSS J1707+6443
• The stellar, molecular gas and dust content of the host galaxies of two z~2.8 dust obscured quasars
• Infrared Imaging of SDSS Quasars: Implications for the Quasar K correction
• Searching for the most distant blazars with the Fermi Gamma-ray Space Telescope
• A Multiwavelength Study on the Fate of Ionizing Radiation in Local Starbursts
• Revisiting the Completeness and the Luminosity Function in High-Redshift Low-Luminosity Quasar Surveys
• A flexible method for estimating luminosity functions via Kernel Density Estimation
• Paving the Way for Euclid and JWST via Optimal Selection of High-z Quasars
• Semi-numeric simulations of helium reionization and the fluctuating radiation background
• Neural-network selection of high-redshift radio quasars, and the luminosity function at z~4
• Ultramassive black holes formed by triple quasar mergers at $z\sim 2$
• Far-infrared emission in luminous quasars accompanied by nuclear outflows
• Multiwavelength Scrutiny of X-ray Sources in Dwarf Galaxies: ULXs versus AGN
• Estimating Black Hole Masses in Hundreds of Quasars
• Quasar UV Luminosity Function at $3.5<z<5.0$ from SDSS Deep Imaging Data
• Is There a Quad Problem among Optical Gravitational Lenses?
• Fast, large volume, GPU enabled simulations for the Ly-alpha forest: power spectrum forecasts for baryon acoustic oscillation experiments
• Astrophysics in 2006
• Evolution of luminosity function and obscuration of AGN: connecting X-ray and Infrared
• The Intrinsic Quasar Luminosity Function: Accounting for Accretion Disk Anisotropy
• The Infrared Medium-Deep Survey II: How to Trigger Radio-AGN? Hints from Their Environments
• The Mid-Infrared Luminosity Evolution and Luminosity Function of Quasars with SDSS and WISE
• Cold Dust Emission from X-ray AGN in the SCUBA-2 Cosmology Legacy Survey: Dependence on Luminosity, Obscuration & AGN Activity
• Statistical analysis of AlIII 1860 and CIII] 1909 emission lines as virial black hole mass estimators in quasars
• Correlation function of quasars in real and redshift space from the Sloan Digital Sky Survey Data Release 7
• Characterizing Quasars in the Mid-infrared: High Signal-to-Noise Spectral Templates
• Constraining the Halo Mass of Damped Ly$\alpha$ Absorption Systems (DLAs) at $z=2-3.5$ using the Quasar-CMB Lensing Cross-correlation
• Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
• A $1.4$ deg${}^2$ blind survey for CII], CIII] and CIV at $\mathbf{z}\sim 0.7-1.5$. II: luminosity functions and cosmic average line ratios
• Neutral gas density in Damped Lyman Alpha systems
• Evolution of the Most Luminous Dusty Galaxies
• X-ray Clusters of Galaxies as Cosmological Tools
• A big red dot at cosmic noon
• Optical Selection of Faint AGN in the COSMOS Field
• Dark matter halos and the M-σrelation for supermassive black holes
• Probing helium reionization with kinetic Sunyaev Zel'dovich tomography
• SDSS J1640+1932: a spectacular galaxy-quasar strong lens system
• Composite spectra of quasars with different UV spectral index
• Waveband Luminosity Correlations in Flux-Limited Multiwavelength Data
• The AGN fraction in high-redshift protocluster candidates selected by Planck and Herschel
• A new apparent quasar pair: Q2225-403A,B
• Selection and Mid-infrared Spectroscopy of Ultraluminous Star-Forming Galaxies at z~2
• The Nature of Luminous Quasars with Very Large C IV Equivalent Widths
• A Sample Bias in Quasar Variability Studies
• Strong Lensed QSOs with Variability Detectable by LSST: How many are there?
• Euclid preparation. Observational expectations for redshift z<7 active galactic nuclei in the Euclid Wide and Deep surveys
• Properties of a Previously Unidentified Instrumental Signature in $\text{Kepler/K2}$ that was Confused for AGN Variability
• The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) II. Luminosity Function
• VLA Snapshot Continuum Survey of FRI Quasar Candidates Selected from the LOFAR Two-Metre Sky Survey (LoTSS)
• A novel Bayesian approach for decomposing the radio emission of quasars: II. Link between quasar radio emission and black hole mass
• A search for nontoroidal topological lensing in the Sloan Digital Sky Survey quasar catalog
• The physical constraints on a new LoBAL QSO at z=4.82
• Infrared spectroscopic confirmation of z~2 photometrically-selected obscured quasars
• Strong Lensing by Subhalos in the Dwarf-Galaxy Mass Range II: Detection Probabilities
• Observations of Ly$\alpha$ Emitters at High Redshift
• High-$z$ Universe probed via Lensing by QSOs (HULQ) I. Number Estimates of QSO-QSO and QSO-Galaxy Lenses
• Seeking the Epoch of Maximum Luminosity for Dusty Quasars
• An Optically Faint Quasar Survey at z~5 in the CFHTLS Wide Field: Estimates of the Black Hole Masses and Eddington Ratios
• A Peculiar Type~II QSO Identified via Broad-band Detection of Extreme Nebular Line Emission
• A left and right truncated Schechter luminosity function for quasars
• Tracing Quasar Narrow-Line Regions Across Redshift: A Library of High S/N Optical Spectra
• Euclid preparation. Optical emission-line predictions of intermediate-z galaxy populations in GAEA for the Euclid Deep and Wide Surveys
• The optical luminosity function of LOFAR radio-selected quasars at $1.4\le z\le 5.0$ in the NDWFS-Boötes field
• Selection Effects in the SDSS Quasar Sample: The Filter Gap Footprint
• Stellar and Black Hole Mass Densities as Empirical Tracers of Co-evolution Show Lock-step Growth since $z\sim 3$
• Morphology and structure of BzK-selected galaxies at z~2 in the CANDELS-COSMOS field
• Physical Models for the Clustering of Obscured and Unobscured Quasars
• Detecting quasars at very high redshift with next generation X-ray telescopes
• Search for extended Lyman-$\alpha$ emission around 9k quasars at z=2-3
• Environments of Strong / Ultrastrong, Ultraviolet Fe II Emitting Quasars
• Photometric Selection of type 1 Quasars in the XMM-LSS Field with Machine Learning and the Disk-Corona Connection
• Revealing the Warm and Hot Halo Baryons via Thomson Scattering of Quasar Light
• The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) III. A red quasar with extremely high equivalent widths showing powerful outflows
• Using microlensed quasars to probe the structure of the Milky Way
• An Extremely Bright QSO at $z=2.89$
• Quasars Have Fewer Close Companions than Normal Galaxies
• The 2.4 $\mu$m Galaxy Luminosity Function as Measured Using WISE. III. Measurement Results
• pop-cosmos: Insights from generative modeling of a deep, infrared-selected galaxy population
• Environments around quasars at $z\sim$3 revealed by wide-field imaging with Subaru HSC and CFHT
• The Physical Properties of Galaxies with Unusually Red Mid-Infrared Colours
• On the Metallicities and Kinematics of the Circumgalactic Media of Damped Ly$\alpha$ Systems at $z\sim 2.5$
• X-ray absorption in Compton-thin AGN: the predictions of a model revisited
• Probing the Wind Component of Radio Emission in Luminous High-Redshift Quasars
• The PAU Survey: The quasar UV and Ly$\alpha$ luminosity functions at $2.7<z<5.3$
• Rapidly Spinning Black Holes in Quasars: An Open Question
• Tracking X-ray Variability in Next Generation EHT LLAGN Targets
• Discovering bright quasars at intermediate redshifts based on the optical/near-IR colors
• Optical and UV properties of a radio-loud and a radio-quiet Population A quasar at high redshift
• QSOs in the combined SDSS/GALEX database
• Revisiting the X-ray-to-UV relation of Quasars in the era of all-sky surveys
• Scalable and Robust Multiband Modeling of AGN Light Curves in Rubin-LSST
• The impact of binary stars on the colors of high-redshift galaxies
• Effects of Biases in Virial Mass Estimation on Cosmic Synchronization of Quasar Accretion
• Ultraviolet Fe II Emission in Fainter Quasars: Luminosity Dependences, and the Influence of Environments
• The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release 10 to 12
• Systematic search for lensed X-ray sources in the CLASH fields
• Completeness III: identifying characteristic systematics and evolution in galaxy redshift surveys
• Exploratory X-Ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: Extended Time-Series Analyses and Stacked Imaging Spectroscopy
• Optical selection of quasars: SDSS and LSST
• Central kiloparsec region of Andromeda. I. Dynamical modelling
• X-ray luminosity functions of different morphological and X-ray type AGN populations
• Extracting the Possible Intrinsic Relation between Radiative Efficiency and Mass of QSOs: a Maximum Likelihood Method and its Application to the SDSS DR7 QSOs
• Simulating quasar microlensing light curves: High magnification events
• The Lyman-$\alpha$ Forest from LBGs: First 3D Correlation Measurement with DESI and Prospects for Cosmology
• A flexible method for estimating luminosity functions via Kernel Density Estimation -- II. Generalization and Python implementation
• The evolution of extragalactic peaked-spectrum sources down to 54 megahertz
• SRG/eROSITA-SDSS view on the relation between X-ray and UV emission for quasars
• Quasar Mass Functions Across Cosmic Time
• Investigating the Accretion Nature of Binary Supermassive Black Hole Candidate SDSS J025214.67-002813.7
• Detecting the signature of helium reionization through 3HeII 3.46cm line-intensity mapping
• Probing Quasar Viewing Angle with the Variability Structure Function
• Bayesian luminosity function estimation in multi-depth datasets with selection effects: A case study for $3<z<5$ Lyman $\alpha$ emitters