Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei

Abstract

(abridged) We have spectrophotometrically monitored a well-defined sample of 28 Palomar-Green quasars in order to obtain measurements of their BLRs and to investigate the relationships between quasar luminosity, central black hole mass, and broad emission line region (BLR) size in active galactic nuclei (AGN). Spectrophotometry was obtained every 1-4 months for 7.5 years, yielding 20-70 observing epochs per object. Both the continuum and emission line fluxes of all of the quasars were observed to change during the duration of the observing program. Seventeen of the 28 objects were observed with adequate sampling to search for correlated variations between the Balmer emission lines and the continuum flux. For each of these 17 objects, a significant correlation was observed, with the Balmer line variations lagging those of the continuum by \~100 days (rest frame). Our work increases the available luminosity range for studying the size-mass-luminosity relations in AGN by two orders of magnitude and doubles the number of objects suitable for such studies. Combining our results with comparable published data available for Seyfert 1 galaxies, we find the BLR size scales with the rest-frame 5100 A luminosity as L^{0.70+-0.03}. This determination of the scaling of the size of the BLR as a function of luminosity is significantly different from those previously published, and suggests that the effective ionization parameter in AGN may be a decreasing function of luminosity. We are also able to constrain, subject to our assumption that gravity dominates the motions of the BLR gas, the scaling relationship between the mass of the central black holes and the luminosity in AGN: M \propto L^{0.5+-0.1}. This is inconsistent with all AGN having optical luminosity that is a constant fraction of the Eddington luminosity.

21 pages, 8 figures included, LaTeX emulateapj.sty, accepted for publication in the Astrophysical Journal. Resubmitting to Correct few confusing sentences in subsection 5.2

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• The properties of the extended warm ionised gas around low-redshift QSOs and the lack of extended high-velocity outflows
• The correlation of line strength with luminosity and redshift from composite QSO spectra
• Velocity-resolved reverberation mapping of five bright Seyfert 1 galaxies
• Photometric AGN reverberation mapping - an efficient tool for BLR sizes, black hole masses and host-subtracted AGN luminosities
• WFI J2026-4536 and WFI J2033-4723: Two New Quadruple Gravitational Lenses
• The relation between black hole mass and velocity dispersion at z~0.37
• The Host Galaxy and Central Engine of the Dwarf AGN POX 52
• MAGIC gamma-ray and multifrequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012
• Magnetically-Driven Accretion-Disk Winds and Ultra-Fast Outflows in PG1211+143
• The Host Galaxies of Low-mass Black Holes
• Exploring NLS1 through the physical properties of their hosts
• Correlation Analysis of a Large Sample of Narrow-Line Seyfert 1 Galaxies: Linking Central Engine and Host Properties
• Simultaneous Ultraviolet and X-ray Observations of the Seyfert Galaxy NGC 4151. I. Physical Conditions in the X-ray Absorbers
• Supermassive black holes with high accretion rates in active galactic nuclei. XI. Accretion disk reverberation mapping of Mrk 142
• Broad-Line Reverberation in the Kepler-Field Seyfert Galaxy Zw 229-015
• How Much Mass do Supermassive Black Holes Eat in their Old Age?
• The Black Hole-Bulge Relationship in Luminous Broad-Line Active Galactic Nuclei and Host Galaxies
• The Color Variability of Quasars
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. VIII. Structure of the Broad-Line Region and Mass of the Central Black Hole in Mrk 142
• Quantifying the fast outflow in the luminous Seyfert galaxy PG1211+143
• The Self-Regulated Growth of Supermassive Black Holes
• The M_BH - M_star relation for X-ray obscured, red QSOs at 1.2< z <2.6
• X-ray reflection in the Seyfert galaxy 1H0419-577 revealing strong relativistic effects in the vicinity of a Kerr black hole
• Cold Accretion Disks and Lineless Quasars
• The Formation of the First Massive Black Holes
• The Origin of the Intrinsic Scatter in the Relation Between Black Hole Mass and Bulge Luminosity for Nearby Active Galaxies
• Orientation dependency of broad-line widths in quasars and consequences for black-hole mass estimation
• Deciphering the JWST spectrum of a 'little red dot' at $z\sim 4.53$: An obscured AGN and its star-forming host
• AGN Feedback Compared: Jets versus Radiation
• Reasoning From Fossils: Learning From the Local Black Hole Population About the Evolution of Quasars
• Does the Narrow [O III] 5007 Line Reflect the Stellar Velocity Dispersion in AGN?
• The Unified Model of Active Galactic Nuclei: II. Evolutionary Connection
• An absorption event in the X-ray lightcurve of NGC 3227
• Mildly Super-Eddington Accretion Onto Slowly-Spinning Black Holes Explains the X-Ray Weakness of the Little Red Dots
• Dust-Deficient Palomar-Green Quasars and the Diversity of AGN Intrinsic IR Emission
• X-ray Properties of Intermediate-mass Black Holes in Active Galaxies
• Supermassive black holes, pseudobulges, and the narrow-line Seyfert 1 galaxies
• Selection effects in the black hole-bulge relation and its evolution
• A Bar Fuels a Super-Massive Black Hole?: Host Galaxies of Narrow-Line Seyfert 1 Galaxies
• SDSS J1254+0846: A Binary Quasar Caught in the Act of Merging
• The largest black holes and the most luminous galaxies
• Twelve years of X-ray and optical variability in the Seyfert galaxy NGC 4051
• The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad Line Region in Mrk 50
• Implications from Late-Time X-ray Detections of Optically Selected Tidal Disruption Events: State Changes, Unification, and Detection Rates
• Triggering Active Galactic Nuclei in Hierarchical Galaxy Formation: Disk instability vs. Interactions
• Application of Stochastic Modeling to Analysis of Photometric Reverberation Mapping Data
• Large-scale outflows in luminous QSOs revisited: The impact of beam smearing on AGN feedback efficiencies
• Black hole accretion and host galaxies of obscured quasars in XMM-COSMOS
• The spatially resolved broad line region of IRAS 09149-6206
• The Sloan Digital Sky Survey Reverberation Mapping Project: MgII Lag Results from Four Years of Monitoring
• Radiation pressure force and black hole mass determination in low redshift type-I and type-II active galactic nuclei
• Dynamical and Spectral Modeling of the Ionized Gas and Nuclear Environment in NGC 3783
• On X-ray variability in narrow line and broad line AGNs
• Powerful flares from recoiling black holes in quasars
• Evidence for periodicity in 43 year-long monitoring of NGC 5548
• Black Hole Masses of Active Galaxies with Double-Peaked Balmer Emission Lines
• Black Hole Mass Estimates of Radio Selected Quasars
• Active galactic nuclei in four metal-poor dwarf emission-line galaxies
• On the geometry of broad emission region in quasars
• Black hole masses from power density spectra: determinations and consequences
• Constraining Sub-Parsec Binary Supermassive Black Holes in Quasars with Multi-Epoch Spectroscopy. III. Candidates from Continued Radial Velocity Tests
• Discovery of a ~2 hr high frequency X-ray QPO and iron K alpha reverberation in the active galaxy MS 2254.9-3712
• The black hole mass of BL Lac objects from the stellar velocity dispersion of the host galaxy
• Space Telescope and Optical Reverberation Mapping Project. IV. Anomalous behavior of the broad ultraviolet emission lines in NGC 5548
• The dependence of quasar variability on black hole mass
• Strongly star-forming rotating disks in a complex merging system at z = 4,7 as revealed by ALMA
• Monitoring AGNs with Hβ Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping
• RUBIES: JWST/NIRSpec Confirmation of an Infrared-luminous, Broad-line Little Red Dot with an Ionized Outflow
• Evidence for Rapidly Spinning Black Holes in Quasars
• Properties of dusty tori in AGN: I. The Case of SWIRE/SDSS Quasars
• The Physical Connections Among IR QSOs, PG QSOs and Narrow-Line Seyfert 1 Galaxies
• Hubble Space Telescope ultraviolet spectroscopy of blazars: emission lines properties and black hole masses
• The resolved size and structure of hot dust in the immediate vicinity of AGN
• Gamma-ray loud quasars: a view with BeppoSAX
• Gamma-loud quasars: a view with BeppoSAX
• The SINS Survey: Broad Emission Lines in High-Redshift Star-Forming Galaxies
• Extended silicate dust emission in PG QSOs
• Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. I. ASCA Observations and the Variability of the X-ray Spectral Components
• Relativistic reverberation in the accretion flow of a tidal disruption event
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
• Calibrating CIV-based black hole mass estimators
• The Independence of AGN Black Hole Mass and Radio-Loudness
• What controls the Fe II strength in active galactic nuclei?
• A Very Radio-Loud Narrow-Line Seyfert 1: PKS 2004-447
• The Baldwin Effect and Black Hole Accretion: A Spectral Principal Component Analysis of a Complete QSO Sample
• A new way to measure supermassive black hole spin in accretion disc dominated Active Galaxies
• Radio-loud Narrow Line Seyfert 1 under a different perspective: a revised black hole mass estimate from optical spectropolarimetry
• The Civ line width distribution for quasars and its implications for broad-line region dynamics and virial mass estimation
• A Combined Optical and X-ray Study of Unobscured Type 1 AGN. II. Relation Between X-ray Emission and Optical Spectra
• The shape of broad-line profiles in AGN
• X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
• A Relation Between Supermassive Black Hole Mass and Quasar Metallicity?
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VIII. Identification of 44 newly detected hard X-ray sources
• Leptonic and Hadronic Radiative Processes in Supermassive-Black-Hole Jets
• Collisionally Regenerated Dark Matter Structures in Galactic Nuclei
• A Revised Calibration of the Virial Mass Estimator for Black Holes in Active Galaxies Based on Single-epoch H$\beta$ Spectra
• Wavelet Analysis of AGN X-Ray Time Series: A QPO in 3C 273?
• On the observed distributions of black hole masses and Eddington ratios from radiation pressure corrected virial indicators
• The accretion ratios in Seyfert 2 galaxies with and without hidden broad-line regions
• Nebular Attenuation in Hα-selected Star-forming Galaxies at z=0.8 from the NewHα Survey
• The UV peak in Active Galactic Nuclei : a false continuum from blurred reflection ?
• Failed radiatively Accelerated Dusty Outflow model of the Broad Line Region in Active Galactic Nuclei. I. Analytical solution
• A Family Tree of Optical Transients from Narrow-Line Seyfert 1 Galaxies
• Geometry and inclination of the broad line region in blazars
• Broad-Band Spectral Energy Distributions of Active Galactic Nuclei from an Accretion Disk with Advective Coronal Flow
• Rest-frame Optical Spectra and Black Hole Masses of 3<z<6 Quasars
• The black hole fundamental plane: revisit with a larger sample of radio and X-ray emitting broad-line AGNs
• Discovery of a bright quasar without a massive host galaxy
• Quasar Black Hole Mass Estimates in the Era of Time Domain Astronomy
• Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. II. Ultraviolet Continuum and Emission-line Variability
• Multi-dimensional modelling of X-ray spectra for AGN accretion-disk outflows II
• Reverberation Mapping of the Broad-line Region in NGC 5548: Evidence for Radiation Pressure?
• The dust sublimation radius as an outer envelope to the bulk of the narrow Fe Kalpha line emission in Type 1 AGN
• The Quasar SDSS J105041.35+345631.3: Black Hole Recoil or Extreme Double-Peaked Emitter?
• Integral-field spectroscopy of the quadruple QSO HE 0435-1223: Evidence for microlensing
• Neutrinos in IceCube from AGN's
• Complex Optical-X-ray Correlations in the Narrow-Line Seyfert 1 Galaxy NGC 4051
• First high energy observations of Narrow Line Seyfert 1s with INTEGRAL/IBIS
• BASS XXV: DR2 Broad-line Based Black Hole Mass Estimates and Biases from Obscuration
• Confirming the high velocity outflow in PG 1211+143
• The black hole fundamental plane from a uniform sample of radio and X-ray emitting broad line AGNs
• A census of ionized gas outflows in type 1 AGNs: gas outflows in AGNs. V
• Spectral Properties From Lyman-alpha to H-alpha For An Essentially Complete Sample of Quasars I: Data
• Mid-IR Variability and Dust Reverberation Mapping of Low-$z$ Quasars. I. Data, Methods and Basic Results
• VLT/ISAAC Spectra of the H-beta Region in Intermediate Redshift Quasars
• How frequent are close supermassive binary black holes in powerful jet sources?
• The Sloan Digital Sky Survey Reverberation Mapping Project: The H$\beta$ Radius-Luminosity Relation
• Low-z MgII Broad Absorption-Line Quasars from the Sloan Digital Sky Survey
• Virial Black Hole Mass Estimates for 280,000 AGNs from the SDSS Broad-Band Photometry and Single Epoch Spectra
• Estimating Black Hole Masses in Quasars Using Broad Optical and UV Emission Lines
• Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. III. Optical Observations and the Optical--UV--X-ray Connection
• The role of Kelvin-Helmholtz instability in the internal structure of relativistic outflows. The case of the jet in 3C 273
• The Evolution of Quasar CIV and SiIV Broad Absorption Lines Over Multi-Year Time Scales
• Can reverberation-measured quasars be used for cosmology?
• Supermassive Black Hole Masses of AGNs with Elliptical Hosts
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. III. Observations of seven southern sources
• Detection of a possible X-ray Quasi-periodic Oscillation in the Active Galactic Nucleus 1H~0707-495
• Chemical Abundances in Broad Emission Line Regions: The "Nitrogen-Loud" QSO 0353-383
• A soft X-ray reverberation lag in the AGN ESO 113-G010
• X-ray/UV Observing Campaign on the Mrk 279 AGN Outflow: A Global Fitting Analysis of the UV Absorption
• VLT/ISAAC Spectra of the H-beta Region in Intermediate-Redshift Quasars II. Black Hole Mass and Eddington Ratio
• Toward precise constraints on growth of massive black holes
• Gravitational microlensing of quasar broad line regions at large optical depths
• The Lick AGN Monitoring Project: Alternate Routes to a Broad-line Region Radius
• Discovery of Nuclear X-ray Sources in SINGS Galaxies
• Black hole shadow as a standard ruler in cosmology
• Microlensing variability in the gravitationally lensed quasar Q2237+0305 = the Einstein Cross, I. Spectrophotometric monitoring with the VLT
• Magellan Spectroscopy of Low-Redshift Active Galactic Nuclei
• Low-luminosity Active Galaxies and their Central Black Holes
• Bulk Comptonization spectra in blazars
• Optical Variability of Narrow and Broad line Seyfert 1 galaxies
• The Fundamental Plane of the Broad-line Region in Active Galactic Nuclei
• The mass of the black hole in 3C 273
• GA-NIFS: Black hole and host galaxy properties of two z$\simeq$6.8 quasars from the NIRSpec IFU
• Numerical simulations of radiation from blazar jets
• The Mass and Spin of The Extreme Narrow Line Seyfert 1 Galaxy 1H 0707-495 and Its Implications for The Trigger for Relativistic Jets
• On the multi-wavelength variability of Mrk 110: Two components acting at different timescales
• Quasar Variability in the Framework of Poissonian Models
• Multi-epoch X-ray observations of the Seyfert 1.2 galaxy Mrk 79: bulk motion of the illuminating X-ray source
• Constraints for the accretion disk evaporation rate in AGN from the existence of the Broad Line Region
• Optical Monitoring of the Broad-Line Radio Galaxy 3C390.3
• The host-galaxy of the gamma-ray Narrow-line Seyfert 1 galaxy 1H~0323+342
• High-ionization mid-infrared lines as black hole mass and bolometric luminosity indicators in active galactic nuclei
• The Link Between Star Formation and Accretion in LINERs: A Comparison with other AGN Subclasses
• The nature of the HE0450-2958 System
• LBQS 0103-2753: A 0.3 Arcsec Binary Quasar
• X-ray vs. Optical Variations in the Seyfert 1 Nucleus NGC 3516: A Puzzling Disconnectedness
• Spectropolarimetry of Seyfert 1 galaxies with equatorial scattering: Black hole masses and Broad Line Region characteristics
• The Swift/BAT AGN Spectroscopic Survey -- IX. The Clustering Environments of an Unbiased Sample of Local AGN
• On the Observational Difference Between the Accretion Disk-Corona Connections among Super- and Sub-Eddington Accreting Active Galactic Nuclei
• On-axis spectroscopy of the host galaxies of 20 optically luminous quasars at z~0.3
• Are there reliable methods to estimate the nuclear orientation of Seyfert galaxies?
• The black hole mass, Eddington ratio, and M_bh-σ_[O III] relation in young radio galaxies
• Black Hole Mass and Bulge Luminosity for Low-mass Black Holes
• Variability of the blazar 4C 38.41 (B3 1633+382) from GHz frequencies to GeV energies
• Black hole mass estimation from X-ray variability measurements in AGN
• Jet formation in BL Lacertae objects with different accretion modes
• Comprehensive Broadband X-ray and Multiwavelength Study of Active Galactic Nuclei in Local 57 Ultra/luminous Infrared Galaxies Observed with NuSTAR and/or Swift/BAT
• A Simple Disk Wind Model for Broad Absorption Line Quasars
• The detection and X-ray view of the changing look AGN HE 1136-2304
• Very Long Baseline Array Imaging of Parsec-scale Radio Emissions in Nearby Radio-quiet Narrow-line Seyfert 1 Galaxies
• Supermassive Black Hole Mass Estimates Using Sloan Digital Sky Survey Quasar Spectra at 0.7 < z < 2
• Reverberation Measurements of the Inner Radii of the Dust Tori in Quasars
• A dynamical measure of the black hole mass in a quasar 11 billion years ago
• Observational evidence for the link between the variable optical continuum and the subparsec-scale jet of the radio galaxy 3C 390.3
• The Sloan Digital Sky Survey Reverberation Mapping Project: Ensemble Spectroscopic Variability of Quasar Broad Emission Lines
• Understanding Broad Mg II Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-Look Quasars
• COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses II. SDSS J0924+0219: the redshift of the lensing galaxy, the quasar spectral variability and the Einstein rings
• BL Lacertae: complex spectral variability and rapid synchrotron flare detected with BeppoSAX
• The relationship between the X-ray variability and the central black hole mass
• Properties of Active Galaxies Deduced from H I Observations
• Decomposition of the Host Galaxies of Active Galactic Nuclei Using Hubble Space Telescope Images
• Accretion Disk Temperatures and Continuum Colors in QSOs
• The 450 days X-ray monitoring of the changing-look AGN 1ES 1927+654
• Eddington-Limited Accretion in z~2 WISE-selected Hot, Dust-Obscured Galaxies
• Quasar Parallax: a Method for Determining Direct Geometrical Distances to Quasars
• Narrow Line Seyfert 1 galaxies at hard X-rays
• Constraining spins of supermassive black holes from TeV variability. II. fully general relativistic calculations
• The Sloan Digital Sky Survey Reverberation Mapping Project: Low-Ionization Broad-Line Widths and Implications for Virial Black Hole Mass Estimation
• Black hole mass and accretion rate of active galactic nuclei with double-peaked broad emission lines
• Variability of Narrow, Associated Absorption Lines in Moderate- and Low-Redshift Quasars
• Identification of a New $\gamma$-ray-emitting narrow-line Seyfert 1 Galaxy, at Redshift $\sim 1$
• New constraints on the X-ray spectral properties of type 1 AGN
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. X. A new multi-year, multi-observatory campaign
• Is There a Metallicity--Luminosity Relationship in AGN? The Case of Narrow-Line Seyfert 1 Galaxies
• New Estimators of Black Hole Mass in Active Galactic Nuclei with Hydrogen Paschen Lines
• The host galaxies and black-hole:galaxy mass ratios of luminous quasars at z~4
• The Unified Model of Active Galactic Nuclei: I. Non-hidden Broad Line Region Seyfert 2 and Narrow Line Seyfert 1 Galaxies
• The Central Engines of Narrow-Line Seyfert 1 Galaxies
• A microlensing measurement of the size of the broad emission line region in the lensed QSO 2237+0305
• The disc-like host galaxies of radio-loud Narrow-Line Seyfert 1s
• No evidence for a different accretion mode for all 3CR FR I radio galaxies
• LLAMA: The $M_{BH}$ - ${\sigma }_{\star }$ Relation of the most luminous local AGNs
• Dynamical and photometric imprints of feedback processes on the early evolution of E/S0 galaxies
• Modelling the spectral energy distribution of super-Eddington quasars
• Modelling the Extreme X-ray Spectrum of IRAS 13224-3809
• The black hole--bulge relation in AGNs
• NLS1 galaxies and estimation of their central black hole masses from the X-ray excess variance method
• Black Hole Masses in Three Seyfert Galaxies
• Double quasars: probes of black hole scaling relationships and merger scenarios
• Suzaku Observation of a Hard Excess in 1H 0419-577: Detection of a Compton-Thick Partial-Covering Absorber
• Simulations of the OzDES AGN Reverberation Mapping Project
• On the black-hole mass -- radio luminosity relation for flat-spectrum radio-loud quasars
• Stellar Photometric Structures of the Host Galaxies of Nearby Type 1 Active Galactic Nuclei
• Eddington Accretion and QSO Emission Lines at z ~ 2
• The Mass of Quasar Broad Emission Line Regions
• SDSS J160531.84+174826.1: A Dwarf Disk Galaxy With An Intermediate-Mass Black Hole
• A parallax distance to 3C 273 through spectroastrometry and reverberation mapping
• Multi-color optical monitoring of the quasar 3C 273 from 2005 to 2016
• A view of the narrow-line region in the infrared: active galactic nuclei with resolved fine-structure lines in the Spitzer archive
• Accretion Disk Sizes from Continuum Reverberation Mapping of AGN Selected from the ZTF Survey
• Black hole masses in narrow-line Seyfert 1 galaxies
• Clues to Quasar Broad Line Region Geometry and Kinematics
• Black hole mass and Eddington ratio distribution functions of X-ray selected broad-line AGNs at z~1.4 in the Subaru XMM-Newton Deep Field
• The Mass of the Black Hole in the Quasar PG 2130+099
• Discovery of 5000 Active Galactic Nuclei behind the Magellanic Clouds
• On the BL Lacertae objects/radio quasars and the FRI/II dichotomy
• Revealing the X-ray Variability of AGN with Principal Component Analysis
• Black hole mass estimation for Active Galactic Nuclei from a new angle
• Testing broad line region models with Reverberation Mapping
• A Local Baseline of the Black Hole Mass Scaling Relations for Active Galaxies. III. The BH mass - $\sigma$ relation
• CIV Line-Width Anomalies: The Perils of Low S/N Spectra
• Broad Band Photometric Reverberation Mapping of NGC 4395
• Coexistence of Gravitationally Bound and Radiation Driven CIV Emission Line Regions in Active Galactic Nuclei
• Constraints on AGN accretion disc viscosity derived from continuum variability
• Inclinations and black hole masses of Seyfert 1 galaxies
• Emission line widths and QSO black hole mass estimates from the 2dF QSO Redshift Survey
• Supermassive Black Hole Winds in X-rays -- SUBWAYS. I. Ultra-fast outflows in QSOs beyond the local Universe
• Comment on the Black Hole Recoil Candidate Quasar SDSS J092712.65+294344.0
• The Energy-dependent X-ray Timing Characteristics of the Narrow Line Seyfert 1 Mkn 766
• Estimate black hole masses of AGNs using ultraviolet emission line properties
• Host galaxies and black hole masses of low and high luminosity radio loud active nuclei
• Microlensing of the Lensed Quasar SDSS0924+0219
• Spatial Correlation Function of the Chandra Selected Active Galactic Nuclei
• Mid-infrared flare of TDE candidate PS16dtm: dust echo and implications for the spectral evolution
• Optical Properties of Radio-selected Narrow Line Seyfert 1 Galaxies
• Towards equation of state of dark energy from quasar monitoring: Reverberation strategy
• CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)
• Chandra Observations of X-ray Weak Narrow-Line Seyfert 1 Galaxies
• Time delay measurement of Mg II line in CTS C30.10 with SALT
• Photometric reverberation mapping of 3C120
• Limits on the Mass of the Central Black Hole in 16 Nearby Bulges
• The basic parameters of gamma-ray-loud blazars
• A Possible ~20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-Quiet Active Galactic Nucleus Ark 120
• Virial Masses of Black Holes from Single Epoch Spectra of AGN
• Evidence for an intermediate line region in AGN's inner torus region and its evolution from narrow to broad line Seyfert I galaxies
• A Physical Link Between Jet Formation and Hot Plasma in Active Galactic Nuclei
• Relativistic X-ray reverberation modelling of the combined time-averaged and lag-energy spectra in AGN
• Super-Eddington QSO RX J0439.6-5311. II. Multi-wavelength Constraints on the Global Structure of the Accretion Flow
• The CIV Baldwin effect in QSOs from Seventh Data Release of the Sloan Digital Sky Survey
• Size-Mass-luminosity relations in AGN and the role of the accretion disc
• Growth of massive black holes by super-Eddington accretion
• Radio Properties of Low Redshift Broad Line Active Galactic Nuclei
• A Reverberation-Based Black Hole Mass for MCG-06-30-15
• The spatial clustering of ROSAT All-Sky Survey Active Galactic Nuclei IV. More massive black holes reside in more massive dark matter halos
• Black Hole Masses of Intermediate-Redshift Quasars: Near Infrared Spectroscopy
• Spin orientation of supermassive black holes in active galaxies
• Super- and sub-Eddington accreting massive black holes: A comparison of slim and thin accretion discs through study of the spectral energy distribution
• The Host Galaxy and Rapidly Evolving Broad-line Region in the Changing-look Active Galactic Nucleus 1ES 1927+654
• The Lick AGN Monitoring Project: Photometric Light Curves and Optical Variability Characteristics
• The Building Up of the Black Hole Mass - Stellar Mass Relation
• Probing narrow-line Seyfert 1 galaxies in the southern hemisphere
• Low-Ionization Emission Regions in Quasars: Gas Properties Probed with Broad O I and Ca II Lines
• Integral field spectroscopy of nearby QSOs II. The molecular gas content and condition for star formation
• Orientation effects on spectral emission features of quasars
• Confronting LCDM with Gravitational Lensing Constraints on Small Scale Structure
• The supermassive black hole in the Seyfert 2 galaxy NGC 5252
• Rehabilitating CIV-based black hole mass estimates in quasars
• GALEX observations of quasar variability in the ultraviolet
• Evidence that most type 1 AGN are reddened by dust in the host ISM
• Determining Quasar Black Hole Mass Functions from their Broad Emission Lines: Application to the Bright Quasar Survey
• The narrow-line region of narrow-line and broad-line type 1 AGN I. A zone of avoidance in density
• Implications of Quasar Black Hole Masses at High Redshifts
• Extending the Calibration of CIV-Based Single-Epoch Black Hole Mass Estimators for Active Galactic Nuclei
• The BH mass of nearby QSOs: a comparison of the bulge luminosity and virial methods
• Photometric Reverberation Mapping of the Broad Emission Line Region in Quasars
• The Disc-Jet Relation in Strong-Lined Blazars
• Spectroscopic Redshifts for Seven Lens Galaxies
• The High-Velocity Outflow of PG1211+143 May Not be That Fast
• Vertical broad-line region structure in nearby active galactic nuclei
• Anti-correlation between the mass of a supermassive black hole and the mass accretion rate in type I ultraluminous infrared galaxies and nearby QSOs
• Extreme star formation events in quasar hosts over $0.5<\text{z}<4$
• Tests for Standard Accretion Disk Models by Variability in Active Galactic Nuclei
• NUclei of GAlaxies: V. Radio emission in 7 NUGA sources
• On Reverberation Mapping Lag Uncertainties
• Detection of chromatic microlensing in Q 2237+0305 A
• Suzaku Studies of Wide-Band Spectral Variability of the Bright Type I Seyfert Galaxy Markarian 509
• Quasar bolometric corrections: theoretical considerations
• Resolving the large scale spectral variability of the luminous Seyfert 1 galaxy 1H 0419-577: Evidence for a new emission component and absorption by cold dense matter
• A near-infrared relationship for estimating black hole masses in active galactic nuclei
• SUPER III. Broad Line Region properties of AGN at z$\sim$2
• The Mysterious Absence of Neutral Hydrogen within One Mpc of a Luminous Quasar at Redshift 2.168
• On the Scatter in the Radius - Luminosity Relationship for Active Galactic Nuclei
• The dust origin of the Broad Line Region and the model consequences for AGN unification scheme
• Reverberation and photoionization estimates of the Broad Line Region Radius in Low-z Quasars
• The Spectral Energy Distribution and Emission-Line properties of the NLS1 Galaxy Arakelian 564
• The Black Hole Masses and Eddington Ratios of Type 2 Quasars
• BLR kinematics and Black Hole Mass in Markarian 6
• Nuclear/Circumnuclear Starbursts and Active Galactic Nuclei Mass Accretion in Seyfert Galaxies
• Cosmological test using the Hubble diagram of high-z quasars
• The Locus of Highly Accreting AGNs on the M_BH--sigma Plane: Selections, Limitations, and Implications
• Time Delay of MgII Emission Response for the Luminous Quasar HE 0435-4312: Towards Application of High-Accretor Radius-Luminosity Relation in Cosmology
• Is there a relationship between AGN and star formation in IR-bright AGNs?
• Reverberation Mapping of the Kepler-Field AGN KA1858+4850
• Search of sub-parsec massive binary black holes through line diagnosis
• The evolution of star formation in quasar host galaxies
• Monitoring AGNs with H$\beta$ Asymmetry. III. Long-term Reverberation Mapping Results of 15 Palomar-Green Quasars
• Accretion rates and accretion efficiency in AGNs
• Identification of SDSSJ141324.27+530527.0 as A New "Changing-Look" Quasar with a "Turn-on" Transition
• The Largest Blueshifts of [O III] emission line in Two Narrow-Line Quasars
• Multifrequency Studies of the Peculiar Quasar 4C +21.35 During the 2010 Flaring Activity
• Time-delay measurement of MgII broad line response for the highly-accreting quasar HE 0413-4031: Implications for the MgII-based radius-luminosity relation
• Submillimeter Array Identification of the Millimeter-Selected Galaxy SSA22-AzTEC1: A Protoquasar in a Protocluster?
• Calibration and Limitations of the Mg II line-based Black Hole Masses
• Observations of a black hole X-ray binary indicate formation of a magnetically arrested disk
• Host galaxies of bright high redshift quasars: Luminosities and colours
• Type I ULIRGs: Transition Stage from ULIRGs to QSOs
• Swift/UVOT grism monitoring of NGC 5548 in 2013: an attempt at MgII reverberation mapping
• A New H I Survey of Active Galaxies
• NIR spectroscopy of SDSS J0303-0019: a low luminosity, high Eddington ratio quasar at z~6
• The Properties and the Evolution of the Highly Ionized Gas in MR2251-178
• Observational Evidence for Young Radio Galaxies are Triggered by Accretion Disk Instability
• X-ray emission from active galactic nuclei with intermediate mass black holes
• Simultaneous Ultraviolet and Optical Emission-line Profiles of Quasars: Implications for Black Hole Mass Determination
• The orientation dependence of quasar single-epoch black hole mass scaling relationships
• Cosmological evolution of massive black holes: effects of Eddington ratio distribution and quasar lifetime
• Spectral Energy Distributions of Flat Spectrum Radio Quasars observed with BeppoSAX
• Synchronized Co-evolution between Supermassive Black Holes and Galaxies Over the Last Seven Billion Years as Revealed by the Hyper Suprime-Cam
• On the black hole mass of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
• Jet-driven galaxy-scale gas outflows in the hyper-luminous quasar 3C273
• The quasar M_bh - M_host relation through Cosmic Time I - Dataset and black hole masses
• AGN Black hole mass estimates using polarization in broad emission Lines
• Large-scale environments of narrow-line Seyfert 1 galaxies
• The black holes of radio galaxies during the "Quasar Era": Masses, accretion rates, and evolutionary stage
• Kinematics of elliptical galaxies with a diffuse dust component - III. A Monte Carlo approach to include the effects of scattering
• Evolution of chemical abundances in Seyfert galaxies
• The variable, fast soft X-ray wind in PG 1211+143
• The emission spectrum of the strong Fe II emitter BAL Seyfert 1 galaxy IRAS 07598+6508
• Mkn 1239: A highly polarized NLS1 with a steep X-ray spectrum and strong NeIX emission
• Eddington ratio Distribution of X-ray selected broad-line AGNs at 1.0<z<2.2
• Black Hole Mass Estimates and Rapid Growth of Supermassive Black Holes in Luminous $z\sim$ 3.5 Quasars
• Slim Disks with Transition Regions and Applications to Microquasars and Narrow Line Seyfert 1 Galaxies
• Reverberation Mapping of Active Galactic Nuclei
• The Impact of Energy Feedback on Quasar Evolution and Black Hole Demographics
• The extent of the MgII absorbing circum-galactic medium of quasars
• Flat-Spectrum Radio Quasars from SDSS DR3 Quasar Catalogue
• Constraints on the broad line region from regularized linear inversion: Velocity-delay maps for five nearby active galactic nuclei
• Multiwavelength behaviour of the blazar OJ 248 from radio to γ-rays
• The Centurion 18 telescope of the Wise Observatory
• Consistency of the black hole mass determination in AGN from the reverberation and the X-ray excess variance method
• Fe K Line Profile in Low-redshift Quasars: Average Shape and Eddington Ratio Dependence
• The evolution of host mass and black hole mass in QSOs from the 2dF QSO Redshift Survey
• Modification of the gamma-ray spectra by internal absorption in OVV blazars: The example cases of 3C 273 and 3C 279
• The blazar S5 0014+813: a real or apparent monster?
• Calibration of the virial factor $f$ in supermassive black hole masses of reverberation-mapped AGNs
• Statistical multifrequency study of narrow-line Seyfert 1 galaxies
• Astronomical Distance Determination in the Space Age. Secondary distance indicators
• BeppoSAX Observations of Synchrotron X-ray Emission from Radio Quasars
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. II. The nature of four unidentified sources
• A comparative study of optical/ultraviolet variability of narrow-line Seyfert 1 and broad-line Seyfert 1 active galactic nuclei
• Reverberation Mapping Measurements of Black Hole Masses and Broad-Line Region Kinematics in Mrk 817 and NGC 7469
• Current and future applications of Reverberation-mapped quasars in Cosmology
• The Sloan Digital Sky Survey Reverberation Mapping Project: Comparison of Lag Measurement Methods with Simulated Observations
• CIV and CIII] reverberation mapping of the luminous quasar PG 1247+267
• Probing the Radio Loud/Quiet AGN dichotomy with quasar clustering
• Reverberation mapping of narrow-line Seyfert 1 galaxy I Zwicky 1: black hole mass
• The connection between black hole mass and Doppler boosted emission in BL Lacertae type objects
• On the cool gaseous haloes of quasars
• Silicate Dust in Active Galactic Nuclei
• OzDES Reverberation Mapping Program: The first Mg II lags from five years of monitoring
• Evidence for the evolutionary sequence of blazars: different types of accretion flows in BL Lac objects
• Accretion Rates of Red Quasars from the Hydrogen P$\beta$ line
• Exploratory X-ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: Initial Results
• Super-Eddington Accretion in the WISE-Selected Extremely Luminous Infrared Galaxy W2246-0526
• The Case for Optically-Thick High Velocity Broad Line Region Gas in Active Galactic Nuclei
• The mass of the black hole in RE J1034+396
• Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC~4151 During Outburst Stage: Evidence for Kinematics Evolution of Broad-line Region
• The Host Galaxy of 3C 279
• Outflows from active galactic nuclei: The BLR-NLR metallicity correlation
• A Non-parametric Approach to Constrain the Transfer Function in Reverberation Mapping
• Continuum Variability of Active Galactic Nuclei in the Optical-UV Range
• Is There a Disc in the Superluminal Quasars?
• The Nature of the Emission Components in the Quasar/NLS1 PG1211+143
• Imprints of a high velocity wind on the soft x-ray spectrum of PG 1211+143
• Supermassive black holes with high accretion rates in active galactic nuclei: X. Optical variability characteristics
• Evidence for Gravitational Infall of Matter onto the Super-Massive Black Hole in the quasar PG 1211+143?
• High Redshift Standard Candles: Predicted Cosmological Constraints
• Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 3516
• Integral Field Spectroscopy of AGN Absorption Outflows: Mrk 509 and IRAS F04250-5718
• Test of the Formation mechanism of the Broad Line Region in Active Galactic Nuclei
• Black hole masses and starbursts in X-shaped radio sources
• Baryon Loading Efficiency and Particle Acceleration Efficiency of Relativistic Jets: Cases For Low Luminosity BL Lacs
• The Black Hole Mass - Stellar Velocity Dispersion Relationship for Quasars in the Sloan Digital Sky Survey Data Release 7
• Can we improve CIV-based single epoch black hole mass estimations?
• Connecting X-ray nuclear winds with galaxy-scale ionised outflows in two $z\sim 1.5$ lensed quasars
• Spectral Signatures of Photon-Particle Oscillations from Celestial Objects
• Reverberation Mapping of the Broad Line Region: application to a hydrodynamical line-driven disk wind solution
• MgII Line Variability of High Luminosity Quasars
• The Jet Power and Emission Line Correlations of Radio Loud Optically Selected Quasars
• Understanding AGN-Host Connection in Partially Obscured Active Galactic Nuclei. Part I: The Nature of AGN+HII Composites
• Is BL Lacertae an "orphan" AGN? Multiband and spectroscopic constraints on the parent population
• Optical and radio properties of giant radio quasars: Central black hole characteristics
• The Best Constraints on A Super-Eddington Accretion Flow: XMM-Newton Observations of An Intermediate-mass Black Hole
• Line and continuum variability of two intermediate-redshift, high-luminosity quasars
• The Close AGN Reference Survey (CARS): IFU survey data and the BH mass dependence of long-term AGN variability
• Spitzer Space Telescope Measurements of Dust Reverberation Lags in the Seyfert 1 Galaxy NGC 6418
• Application of the Disk Evaporation Model to AGNs
• A 10-day ASCA Observation of the Narrow-line Seyfert~1 galaxy IRAS 13224-3809
• Direct Measurement of the X-ray Time-Delay Transfer Function in Active Galactic Nuclei
• Spectroscopic monitoring of the BL Lac object AO 0235+164
• Evolution of accretion disks around massive black holes: constraints from the demography of active galactic nuclei
• Evidence for Two Distinct Broad-Line Regions from Reverberation Mapping of PG 0026+129
• SDSS J211852.96-073227.5: a new γ-ray flaring narrow-line Seyfert 1 galaxy
• Stability of the Broad Line Region Geometry and Dynamics in Arp 151 Over Seven Years
• Supercritical growth pathway to overmassive black holes at cosmic dawn: coevolution with massive quasar hosts
• A New Approach to Constrain Black Hole Spins in Active Galaxies Using Optical Reverberation Mapping
• XMM-Newton Observations of High Redshift Quasars
• A test on external Compton models for $\gamma$-ray active galactic nuclei
• Absence of the predicted 2022 October outburst of OJ 287 and implications for binary SMBH scenarios
• Probing the Origin of Changing-look Quasar Transitions with Chandra
• An Intrinsic Absorption Complex Toward RXJ1230.8+0115: Geometry and Photoionization Conditions
• Black hole masses and Doppler factors of $\gamma$-ray active galactic nuclei
• Supermassive Black Hole and Broad-line Region in NGC~5548: Results from Five-season Reverberation Mapping
• The Sloan Digital Sky Survey Reverberation Mapping Project: An Investigation of Biases in CIV Emission-Line Properties
• Variability of gamma-ray emission from blazars on the black hole timescales
• A comparative analysis of virial black-hole mass estimates of moderate-luminosity active galactic nuclei using Subaru/FMOS
• First detection of hard X-ray photons in the soft X-ray transient Narrow-Line Seyfert 1 galaxy WPVS 007: The X-ray photon distribution observed by Swift
• Imprints of the Janis-Newman-Winicour spacetime on observations related to shadow and accretion
• Synchrotron flaring in the jet of 3C 279
• Intrinsic Absorption Properties in Active Galaxies Observed with the Far Ultraviolet Spectroscopic Explorer
• Quasar Cartography: from Black Hole to Broad Line Region Scales
• Is the Broad-Line Region Clumped or Smooth? Constraints from the H alpha Profile in NGC 4395, the Least Luminous Seyfert 1 Galaxy
• Radiative Efficiency of Disk Accretion in Individual SDSS QSOs
• Obscured AGN from the ELAIS Deep X-ray Survey
• The Optical and Ultraviolet Emission-Line Properties of Bright Quasars with Detailed Spectral Energy Distributions
• The AKARI 2.5-5.0 Micron Spectral Atlas of Type-1 Active Galactic Nuclei: Black Hole Mass Estimator, Line Ratio, and Hot Dust Temperature
• Spectral Energy Distributions of 3C 279 revisited: BeppoSAX observations and variability models
• Extended emission-line regions in low-redshift quasars: Dependence on nuclear spectral properties
• Swift/XRT- NuSTAR spectra of type 1 AGN]{Swift/XRT- NuSTAR spectra of type 1 AGN: confirming INTEGRAL results on the high energy cut-off
• Differential Microlensing Measurements of Quasar Broad Line Kinematics in Q2237+0305
• Failed disk winds; a physical origin for the soft X-ray excess?
• Two New "Turn-off" Changing-look Active Galactic nuclei and Implication on "Partially Obscured" AGNs
• Internal shocks and the blazar sequence. Low and intermediate power BL Lac objects
• Probing variability patterns of the Fe K line complex in bright nearby AGNs
• X-ray Spectral and Variability Properties of Low-Mass AGN
• QSO Narrow [OIII] Line Width and Host Galaxy Luminosity
• Decoding signatures of extra dimensions and estimating spin of quasars from the continuum spectrum
• Detection of a second high velocity component in the highly ionized wind from PG 1211+143
• Extending Virial Black Hole Mass Estimates to Low-Luminosity or Obscured AGN: the cases of NGC 4395 and MCG -01-24-012
• Broad-band continuum and line emission of the gamma-ray blazar PKS 0537-441
• Broad-line region in NGC 4151 monitored by two decades of reverberation mapping campaigns. I. Evolution of structure and kinematics
• Variation in the Scattering Shroud Surrounding Markarian 231
• Novel calibrations of virial black hole mass estimators in active galaxies based on X-ray luminosity and optical/NIR emission lines
• Masses, Accretion Rates and Inclinations of AGNs
• Evidence for an Untruncated Accretion Disk in the Broad-Line Radio Galaxy 4C+74.26
• High-Resolution Absorption Spectroscopy of Multi-phase, High-Metallicity Gas Associated with the Luminous Quasar HE 0226-4110
• A Herschel Study of 24 micron-Selected AGNs and Their Host Galaxies
• Probing the origin of low-frequency radio emission in PG quasars with the uGMRT -- I
• Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs
• Searching for the Physical Drivers of Eigenvector-1: From Quasars to Nano-Quasars
• A Chandra HETGS observation of the Narrow-line Seyfert 1 galaxy Ark 564
• Two extreme double-peaked line emitters in the Sloan Digital Sky Survey
• The Quasar SDSS J153636.22+044127.0: A Double-Peaked Emitter in a Candidate Binary Black-Hole System
• Balmer Emission Line Profiles and the Complex Properties of Broad Line Regions in Active Galactic Nuclei
• Spatially-Resolved Narrow Line Region Kinematics in Active Galactic Nuclei
• Accurate classification of 75 counterparts of objects detected in the 54 month Palermo Swift/BAT hard X-ray catalogue
• A High-Quality velocity-delay map of the broad-line region in NGC 5548
• Differential interferometry of QSO broad line regions I: improving the reverberation mapping model fits and black hole mass estimates
• Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. III. Optical Variability and X-ray/UV/Optical Correlations
• Is the X-ray spectrum of the narrow emission line QSO PG1211+143 defined by its energetic outflow?
• Accretion Properties of A Sample of Hard X-ray (<60keV) Selected Seyfert 1 Galaxies
• Masses and Accretion Rates of Supermassive Black Holes in Active Galactic Nuclei from the INTEGRAL Survey
• NuSTAR and multifrequency study of the two high-redshift blazars S5 0836+710 and PKS 2149-306
• Fundamental X-ray Corona Parameters of Swift/BAT AGN
• Monitoring AGNs with Hβ Asymmetry. II. Reverberation Mapping of Three Seyfert Galaxies Historically Displaying Hβ Profiles with Changing Asymmetry: Mrk 79, NGC 3227, and Mrk 841
• Broadband X-Ray Observations of the 2018 Outburst of the Changing-Look Active Galactic Nucleus NGC 1566
• The Origin and Evolution of \civ Baldwin Effect in QSOs from the Sloan Digital Sky Survey
• The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline
• Geometry and Kinematics in the Central Broad-Line Region of a Seyfert 1 Galaxy
• Broad-line region structure and line profile variations in the changing look AGN HE1136-2304
• Black hole mass measurement using ALMA observations of [CI] and CO emissions in the Seyfert 1 galaxy NGC7469
• The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 I. The X-Ray View
• Variable Reddening and Broad Absorption Lines in the Narrow-line Seyfert 1 Galaxy WPVS 007: an Origin in the Torus
• Evidence of bar--driven secular evolution in the gamma--ray narrow--line Seyfert 1 galaxy FBQS J164442.5+261913
• Observation of a sudden cessation of a very-high-energy gamma-ray flare in PKS 1510-089 with H.E.S.S. and MAGIC in May 2016
• Exploring X-ray and radio emission of type 1 AGN up to z ~ 2.3
• SDSS J1130+0058 an X-shaped Radio Source With Double-Peaked Low-Ionization Emission Lines: A binary Black Hole System?
• The Close AGN Reference Survey (CARS): Comparative analysis of the structural properties of star-forming and non-star-forming galaxy bars
• SDSS-IV/SPIDERS: A Catalogue of X-Ray Selected AGN Properties; Spectral Properties and Black Hole Mass Estimates for SPIDERS SDSS DR14 Type 1 AGN
• Identifications of Five INTEGRAL Sources via Optical Spectroscopy
• Dynamical Black Hole Masses of BL Lac Objects from the Sloan Digital Sky Survey
• The host galaxy of a narrow-line Seyfert 1 galaxy RE J1034+396 with X-ray quasi-periodic oscillations
• Probing the Peculiar Behavior of GRS 1915+105 at Near-Eddington Luminosity
• The Line Emission Region in III Zw 2: Kinematics and Variability
• Size and disk-like shape of the broad-line region of ESO399-IG20
• The High-z Quasar Hubble Diagram
• Interpretation of Departure from the Broad Line Region Scaling in Active Galactic Nuclei
• The relativistic jet and its central engine of $Fermi$ blazars
• A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255 II. Emission- and absorption-line variability time lags
• The X-ray Power Spectral Density Function and Black Hole Mass Estimate for the Seyfert AGN IC 4329a
• Rapid Luminosity Decline and Subsequent Reformation of the Innermost Dust Distribution in the Changing-look AGN Mrk 590
• The Two-Phase, Two-Velocity Ionized Absorber in the Seyfert 1 Galaxy NGC 5548
• Extreme Gaseous Outflows in Radio-Loud Narrow-Line Seyfert 1 Galaxies
• Broad-line Region of the Quasar PG 2130+099 from a Two-Year Reverberation Mapping Campaign with High Cadence
• What sparks the radio-loud phase of nearby quasars?
• Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy?
• Unusual high-redshift radio BAL quasar 1624+3758
• A complete view of the broad-line radio galaxy 4C+74.26 with XMM-Newton
• Recurrence of the blue wing enhancements in the high ionization lines of SDSS 1004+4112 A
• Multiwavelength variability study and search for periodicity of PKS 1510-089
• A New Approach to the Internal Calibration of Reverberation Mapping Spectra
• Seoul National University Bright Quasar Survey in Optical (SNUQSO). II. Discovery of 40 Bright Quasars Near the Galactic Plane
• Radiation pressure on dust explains the Low Ionized Broad Emission Lines in Active Galactic Nuclei
• Methods of Reverberation Mapping. I. Time-lag Determination by Measures of Randomness
• On the central black hole mass in Mkn~501
• Fe II Diagnostic Tools for Quasars
• The Estimation of Fundamental Physics Parameters for Fermi-LAT Blazars
• The LSST era of supermassive black holes accretion-disk reverberation mapping
• A Systematic Analysis of Stellar Populations in the Host Galaxies of Changing-look AGNs
• Kinematic signatures of reverberation mapping of close binaries of supermassive black holes in active galactic nuclei
• The origin of emission and absorption features in Ton S180 Chandra observations
• Scatter Analysis Along the Multidimensional Radius-Luminosity Relations for Reverberation-Mapped Mg II Sources
• Do reverberation-measured H$\beta$ quasars provide a useful test of cosmology?
• MOIRCS Deep Survey III: Active Galactic Nuclei in Massive Galaxies at z=2-4
• Active Galactic Nuclei with Ultra-fast Outflows Monitoring Project: The Broad-line Region of Mrk 79 as a Disk Wind
• Ultraviolet Emission-Line Correlations in Hubble/COS Spectra of Active Galactic Nuclei: Single-Epoch Black Hole Masses
• New Method for Exploring Super-Eddington AGNs by Near-infrared Observations
• Integral field spectroscopy of four lensed quasars: analysis of their neighborhood and evidence for microlensing
• Complex emission line region of Mrk 817
• A Jet Model for the Broadband Spectrum of the Seyfert-1 Galaxy NGC 4051
• Modeling accretion disk emission with generalized temperature profile and its effect on AGN spectral energy distribution
• Discovery of Extremely Broad Balmer Absorption Lines in SDSS J152350.42+391405.2
• Chandra high resolution spectroscopy of the circumnuclear matter in the Broad Line Radio Galaxy 3C445
• VLBI Observations of a sample of Palomar-Green quasars I: parsec-scale morphology
• Variability of Optical \ion{Fe}{ii} Complex in Narrow-Line Seyfert 1 Galaxy NGC 4051
• Black-hole mass estimates for a homogeneous sample of bright flat-spectrum radio quasars
• Measuring Supermassive Black Holes in Distant Galaxies with Central Lensed Images
• The Duty-cycle of Gamma-ray Blazars: a New Approach, New Results
• Dust reverberation mapping in the era of big optical surveys and its cosmological application
• A new method to measure the virial factors in the reverberation mapping of AGNs
• Accurate classification of 29 objects detected in the 39 months Palermo Swift/BAT hard X-ray catalogue
• Implications from the optical to UV flux ratio of FeII emission in quasars
• The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy
• The broad Fe Kα line and supermassive black holes
• Disk-Jet Connection in Active Supermassive Black Holes in the Standard Accretion Disk Regime
• Anatomy of the AGN in NGC 5548 IX. Photoionized emission features in the soft X-ray spectra
• Consistency study of high- and low-accreting Mg ii quasars: No significant effect of the Fe ii to Mg ii flux ratio on the radius-luminosity relation dispersion
• Broad line region and black hole mass of PKS 1510-089 from spectroscopic reverberation mapping
• Constraining the quasar population with the broad-line width distribution
• Untangling Optical Emissions of the Jet and Accretion Disk in the Flat-Spectrum Radio Quasar 3C 273 with Reverberation Mapping Data
• X-Ray Absorption Analysis of MCG-6-30-15: Discerning Three Kinematic Systems
• Stronger Constraints on the Evolution of the $M_{\mathrm{BH}}-{\sigma }_{\ast }$ Relation up to $z\sim 0.6$
• Quasar Tomography: Unification of Echo Mapping and Photoionisation Models
• Studying X-ray reprocessing and continuum variability in quasars: PG 1211+143
• Simultaneous H alpha and dust reverberation mapping of 3C120: Testing the bowl-shaped torus geometry
• AT 2021loi: A Bowen Fluorescence Flare with a Rebrightening Episode, Occurring in a Previously-Known AGN
• Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
• A Hubble Space Telescope Imaging Survey of Low-Redshift Swift-BAT Active Galaxies
• Probing the M-sigma Relation in the Non-Local Universe Using Red QSOs
• What is on Tap? The Role of Spin in Compact Objects and Relativistic Jets
• Ionized Outflows in Nearby Quasars are Poorly Coupled to their Host Galaxies
• Fundamental differences in the properties of red and blue quasars: measuring the reddening and accretion properties with X-shooter
• High Energy spectra of Seyferts and Unification schemes
• On black hole masses, radio-loudness and bulge luminosities of Seyfert galaxies
• The evolution of the heaviest super-massive black-holes in jetted AGNs
• Suppressed star formation in circumnuclear regions in Seyfert galaxies
• Red Quasars and Quasar Evolution: the Case of BALQSO FIRST J155633.8+351758
• The Blackhole-Dark Matter Halo Connection
• WISE view of Narrow-Line Seyfert 1 galaxies: mid-infrared color and variability
• The PG-RQS survey. Building the radio spectral distribution of radio-quiet quasars. I. The 45-GHz data
• A Full Characterisation of the Supermassive Black Hole in IRAS 09149-6206
• Detection of the Intermediate-width Emission Line Region in Quasar OI 287 with the Broad Emission Line Region Obscured by the Dusty Torus
• A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc
• X-ray timing analysis of the quasar PG 1211+143
• X-ray warm absorption and emission in the polar scattered Seyfert 1 galaxy MRK 704
• Calibrating Mg II-based black-hole mass estimators using Low-to-High-Luminosity Active Galactic Nuclei
• A Rapid X-ray Flare in the Radio-loud Narrow Line Quasar PKS 0558-504
• The Case for Standard Irradiated Accretion Disks in Active Galactic Nuclei
• The Accretion Geometry in Radio-Loud Active Galaxies
• A Study of Outflows in Luminous Quasars at Redshift $\sim 0.4-0.8$
• Nova Sagittarii 1998 (V4633 Sgr) - a permanent superhump system or an asynchronous polar?
• Measuring the level of nuclear activity in Seyfert galaxies and the unification scheme
• The soft X-ray spectrum of the luminous narrow line Seyfert galaxy PG1211+143 - evidence for a second high velocity outflow component
• Supermassive black holes with high accretion rates in active galactic nuclei. VII. Reconstruction of velocity-delay maps by maximum entropy method
• Does the intermediate mass black hole in LEDA 87300 (RGG 118) follow the near-quadratic (M_bh)-(M_spheroid) relation?
• Ultra-luminous Infrared Galaxies in Sloan Digital Sky Survey Data Release 6
• NuSTAR Observations of AGN with Low Observed X-ray to [OIII] Luminosity Ratios: Heavily Obscured AGN or Turned-Off AGN?
• The origin of optical emission from super-Eddington accreting Active Galactic Nuclei: the case of Ton S 180
• Systematic Redshift of the Fe III UV Lines in Quasars. Measuring Supermassive Black Hole Masses under the Gravitational Redshift Hypothesis
• An FMOS Survey of moderate-luminosity broad-line AGN in COSMOS, SXDS and E-CDF-S
• Strong UV and X-ray variability of the Narrow Line Seyfert 1 Galaxy WPVS 007 -- on the nature of the X-ray low state
• The radio loud narrow-line quasar SDSSJ172206.03+565451.6
• The near-infrared radius-luminosity relationship for active galactic nuclei
• Hubble Space Telescope Imaging of the Post-Starburst Quasar UN 1025-0040: Evidence for Recent Star Formation
• The Fundamental Plane of QSOs and the Relationship Between Host and Nucleus
• Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
• Modelling photometric reverberation data -- a disk-like broad-line region and a potentially larger black hole mass for 3C120
• Implications of Einstein-Maxwell dilaton-axion gravity from the black hole continuum spectrum
• Accurate classification of 17 AGNs detected with Swift/BAT
• Is IRAS 01072+4954 a True-Seyfert 2? Hints from Near Infrared Integral Field Spectroscopy
• The Host Galaxy of the Quasar HE 0450-2958
• The influence of gravitational lensing on the spectra of lensed QSOs
• An X-ray view of central engines of low luminosity quasars (LLQSO) in the local Universe
• Expectations for time-delay measurements in active galactic nuclei with the Vera Rubin Observatory
• BeppoSAX Observations of 1-Jy BL Lacertae Objects - II
• The long-term centimeter variability of active galactic nuclei: A new relation between variability timescale and accretion rate
• Reverberation Mapping of the Intermediate Mass Nuclear Black Hole in SDSS J114008.71+030711.4
• Hubble Space Telescope Observations of the Gravitationally Lensed Cloverleaf Broad Absorption Line QSO H1413+1143: Imaging Polarimetry and Evidence for Microlensing of a Scattering Region
• Modelling the AGN broad line region using single-epoch spectra II. Nearby AGN
• Stellar and gaseous velocity dispersions in type II AGNs at 0.3<z<0.83 from the Sloan Digital Sky Survey
• The nature of Composite Seyfert/Star-forming galaxies revealed by X-ray observations
• Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4
• Estimating AGN Black Hole Masses via Continuum Reverberation Mapping in the Era of LSST
• Evidence for higher black hole spin in radio-loud quasars
• An extended size-luminosity relation for the reverberation-mapped AGNs: the role of the accretion rate
• On the dust tori in Palomar-Green quasars
• Systematic Broad-band X-ray Study of super-Eddington Accretion onto Supermassive Black Holes. I. X-ray Continuum
• The estimate of emission region locations of {\it Fermi} FSRQs
• Modeling photometric reverberation mapping data for the next generation of big data surveys. Quasar accretion disks sizes with the LSST
• XMM-Newton observation of the bright Seyfert 1 galaxy, MCG+8-11-11
• Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4
• Considerations for the Observability of Kinematically Offset Binary AGN
• Variability of Moderate Luminosity Active Galactic Nuclei at z=0.36
• On the disappearance of broad-line region in low-luminosity active galactic nuclei: the role of the outflows from advection dominated accretion flows
• On the relation between hard X-ray photon index versus accretion rate for super-Eddington accreting quasars
• X-ray variability of the Narrow Line Seyfert 1 Galaxy PKS 0558-504
• Calibrating Emission Lines as Quasar Bolometers
• Finding Quasars behind the Galactic Plane. II. Spectroscopic Identifications of 204 Quasars at $|b|<20°$
• Soft X-ray precursors of the non-thermal flares in blazars - theoretical predictions
• Reconstructing the Cosmic Evolution of Quasars from the Age Distribution of Local Early-Type Galaxies
• XMM-Newton observation of PG 0844 + 349
• The Structure and Dynamics of an AGN Torus: CO Line Predictions for ALMA from 3D Hydrodynamical Simulations with X-ray Driven Chemistry
• The black hole mass of the $z=2.805$ multiply imaged quasar SDSS J2222+2745 from velocity-resolved time lags of the CIV emission line
• LeMMINGs IV: The X-ray properties of a statistically-complete sample of the nuclei in active and inactive galaxies from the Palomar sample
• High Eddington quasars as discovery tools: current state and challenges
• Extended Ly$\alpha$ emission around quasars with eclipsing damped Ly$\alpha$ systems
• Microlensing Constraints on Broad Absorption and Emission Line Flows in the Quasar H1413+117
• On the Virialization of Disk Winds: Implications for the Black Hole Mass Estimates in AGN
• Accretion Disk Temperatures of QSOs: Constraints from the Emission Lines
• The variability of optical \feii emission in PG QSO 1700+518
• Extreme quasars as distance indicators in cosmology
• The Blueshift Of Civ Broad Emission Line In Qsos
• Evidence for a Young Stellar Population in Nearby Type 1 Active Galaxies
• A new method to obtain the Broad Line Region size of high redshift quasars
• Are the jets accelerated from the disk coronas in some active galactic nuclei?
• The optical variability of SDSS quasars from multi-epoch spectroscopy: I. Results from 60 quasars with $\ge$ six-epoch spectra
• The Formation and Evolution of the First Massive Black Holes
• On the Signatures of Gravitational Redshift: The Onset of Relativistic Emission Lines
• Dynamics of the Lyman alpha and C IV emitting gas in 3C 273
• The Reddest DR3 SDSS/XMM Quasars
• The Kinematics of Quasar Broad Emission Line Regions Using a Disk-wind Model
• Dust Reverberation of 3C273: torus structure and lag -- luminosity relation
• Black Hole Mass Estimation: How good is the virial estimate?
• Spectral variability of FIRST bright QSOs with SDSS observations
• H-AMR FORGE'd in FIRE I: Magnetic state transitions, jet launching and radiative emission in super-Eddington, highly magnetized quasar disks formed from cosmological initial conditions
• Kinematic signatures of AGN feedback in moderately powerful radio galaxies at z~2 observed with SINFONI
• A falling Corona model for the anomalous behavior of the broad emission lines in NGC 5548
• Constraining the geometry and kinematics of the quasar broad emission line region using gravitational microlensing. I. Models and simulations
• Double-peaked Lines, Dual VLBI Components, and Precessing Jets in J1328+2751
• Faint COSMOS AGN at z~3.3 - I. Black Hole Properties and Constraints on Early Black Hole Growth
• Nonthermal radiation from the central region of super-accreting active galactic nuclei
• A 12-day ASCA Observation of the Narrow-Line Seyfert 1 Galaxy Ton S180: Time-Selected Spectroscopy
• Long-term monitoring of Ark 120 with Swift
• The Seoul National University AGN monitoring project. II. BLR size and black hole mass of two AGNs
• Time Series Analysis of Active Galactic Nuclei: The case of Arp 102B, 3C 390.3, NGC 5548 and NGC 4051
• NGC 4051: Black hole mass and photon index-mass accretion rate correlation
• Continuum Acceleration of Black Hole Winds
• M_BH - sigma relation in SDSS flat-spectrum radio quasars
• Search for Intra-day Optical Variability in $\gamma$-ray--loud Blazars S5 0716+714 and 3C 273
• Relation between radio core length and black hole mass for active galactic nuclei
• Dual-high-frequency VLBI study of blazar-jet brightness-temperature gradients and collimation profiles
• Mapping the ionised gas around the luminous QSO HE 1029-1401: Evidence for minor merger events?
• Long-term optical spectroscopic variations in blazar 3C 454.3
• Systematically smaller single-epoch quasar black hole masses using a radius-luminosity relationship corrected for spectral bias
• Lopsidedness in dwarf irregular galaxies
• Revisiting the Black Hole Masses of Soft X-ray-Selected Active Galactic Nuclei
• A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies
• SALT long-slit spectroscopy of LBQS 2113-4538: variability of the Mg II and Fe II component
• Irradiation of accretion discs in active galactic nuclei due to warm absorber
• Constraining black hole masses in low-accreting AGN using X-ray spectra
• Dependence of NLRs sizes on [OIII] luminosity in low redshift AGN with double-peaked broad Balmer emission lines
• Hybrid nature of 0846+51W1: a BL Lac object with a narrow line Seyfert 1 nucleus
• Locating Star-Forming Regions in Quasar Host Galaxies
• Cascades of shocks in Active Galactic Nuclei and their radiation
• Constraints on the location of $\gamma$-ray emitting region for a sample of blazars with radio core-shift measurements
• Spectroastrometry and Reverberation Mapping: the Mass and Geometric Distance of the Supermassive Black Hole in the Quasar 3C 273
• Measurement of The Broad Line Region Size in a Luminous MACHO Quasar
• Oxygen abundances in the narrow line regions of Seyfert galaxies and the metallicity-luminosity relation
• The Large Array Survey Telescope -- Science Goals
• On the Relationship Between the Optical Emission-Line and X-ray Luminosities in Seyfert 1 Galaxies
• Improving the Flux Calibration in Reverberation Mapping by Spectral Fitting: Application to the Seyfert Galaxy MCG--6-30-15
• The Extreme Super-Eddington NLS1 RX J0134.2-4258 -- II. A Weak-Line Seyfert Linking to the Weak-Line Quasar
• The Effect of Variability on the Estimation of Quasar Black Hole Masses
• Tully-Fisher Distances and Dynamical Mass Constraints for 24 Host Galaxies of Reverberation-Mapped AGN
• Variation of Broad Emission Lines from QSOs with Optical/UV Periodicity to Test the Interpretation of Supermassive Binary Black Holes
• The underlying driver for the \civ Baldwin effect in QSOs with $0<z<5$
• Gemini-South + FLAMINGOS Demonstration Science: Near-Infrared Spectroscopy of the z=5.77 Quasar SDSS J083643.85+005453.3
• Variability and the size-luminosity relation of the intermediate mass AGN in NGC 4395
• Do quasar broad-line velocity widths add any information to virial black hole mass estimates?
• Multiwavelength scaling relations for nuclei of Seyfert galaxies
• Limits on luminosity and mass accretion rate of a radiation pressure dominated accretion disc
• High-redshift quasar host galaxies with adaptive optics
• The low-metallicity QSO HE 2158-0107: A massive galaxy growing by the accretion of nearly pristine gas from its environment?
• On time dilation in quasar light curves
• An evolutionary missing link? A modest-mass early-type galaxy hosting an over-sized nuclear black hole
• On-axis spectroscopy of the z=0.144 radio-loud quasar HE 1434-1600: an elliptical host with a highly ionized ISM
• Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 4151 during Outburst Stage. II. Four Season Observation Results
• Black Hole - Bulge Relationship of Post-Starburst Quasars at z \sim 0.3
• Relation between the variations in the MgII $\lambda 2798$ emission-line and the 3000 Å continuum
• Simultaneous detection and analysis of optical and ultraviolet broad emission lines in quasars at z~2.2
• Fantastic Fits with fantasy of Active Galactic Nuclei Spectra -- Exploring the Fe II emission near the H$\alpha$ line
• Modelling time delays from two reprocessors in active galactic nuclei
• Resolving the Clumpy Structure of the Outflow Winds in the Gravitationally Lensed Quasar SDSS J1029+2623
• Active Galactic Nuclei with Double-Peaked Balmer Lines: I. Black Hole Masses and the Eddington ratios
• 3C390.3: More Stable Evidence for Origination of Double-Peaked Broad Balmer Lines from Accretion Disk Near Central Black Hole
• Imprints of the quasar structure in time-delay light curves: Microlensing-aided reverberation mapping
• JWST ERS Program Q3D: The pitfalls of virial BH mass constraints shown in a z = 3 quasar with an ultramassive host
• AGN Activity and Black Hole Masses in Low Surface Brightness Galaxies
• Interpreting the time variable RM observed in the core region of the TeV blazar Mrk 421
• The supermassive black hole masses of reverberation-mapped active galactic nuclei
• A systematic search for hidden type 1 AGNs: gas kinematics and scaling relations
• OzDES Reverberation Mapping Program: Lag recovery reliability for 6-year CIV analysis
• SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line
• Testing the relativistic Doppler boost hypothesis for supermassive binary black holes candidates via broad emission line profiles
• Estimating reddening of the continuum and broad-line region of active galactic nuclei: the mean reddening of NGC 5548 and the size of the accretion disc
• Multiwavelength Analysis of the Variability of the Blazar 3C 273
• Characterization of a sample of intermediate-type AGN. I. Spectroscopic properties and serendipitous discovery of new Dual AGN
• Single-Epoch Black Hole Mass Estimators For Broad-Line Active Galactic Nuclei: Recalibrating Hbeta with A New Approach
• The long time-scale X-ray variability of the radio-quiet quasar PG 0804+761
• The Sloan Digital Sky Survey Reverberation Mapping Project: Composite Lags at $z\lesssim 1$
• Seoul National University Bright Quasar Survey in Optical (SNUQSO) I: First Phase Observations and Results
• Anomalous Broad-Line Region Responses to Continuum Variability in Active Galactic Nuclei. I. H$\beta$ Variability
• Does black hole continuum spectrum signal f(R) gravity in higher dimensions?
• Spectroscopy along Multiple, Lensed Sightlines through Outflowing Winds in the Quasar SDSS J1029+2623
• Update on the X-ray variability plane for active galactic nuclei: The role of the obscuration
• Q2237+0305 source structure and dimensions from light curves simulation
• Virilization of the Broad Line Region in Active Galactic Nuclei - connection between shifts and widths of broad emission lines
• CO line width and the black hole -- bulge relationship at high redshift
• A New Radio Loudness Diagnostic for Active Galaxies: a Radio-To-Mid-Infrared Parameter
• Estimating supermassive black hole masses in AGNs using polarization of broad MgII, H$\alpha$ and H$\beta$ lines
• H$\beta$ Line Widths as an Orientation Indicator for Low-Ionization Broad Absorption Line Quasars
• Merging of a massive black hole binary II
• The optical emission line spectrum of Mark 110
• Independent Black Hole Mass Estimation for the γ-ray Detected Archetypal Narrow-Line Seyfert 1 Galaxy 1H 0323+342 from X-ray Variability
• A physical model for active galactic nuclei with double-peaked broad emission lines
• The non-constant slope of the CIV Baldwin effect in NGC 4151
• Radio Properties of Low Redshift Broad Line Active Galactic Nuclei Including Extended Radio Sources
• Hot Corona Properties of Swift/BAT detected AGN
• The Main Sequence of quasars: the taming of the extremes
• Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
• Quasar variability limits on cosmological density of cosmic strings
• The dark halo of the main lens galaxy in QSO 0957+561
• PKS1932-46: a radio source in an interacting group?
• Estimators of Bolometric Luminosity and Black Hole Mass with Mid-infrared Continuum Luminosities for Dust-obscured Quasars: Prevalence of Dust-obscured SDSS Quasars
• Distance Probes of Dark Energy
• The variability of blazars throughout the electromagnetic spectrum
• The relation between black hole masses and Lorentz factors of the jet components in blazars
• Correlated spectral and temporal changes in 3C 390.3: a new link between AGN and Galactic Black Hole Binaries?
• Measuring the luminosity and virial black hole mass dependence of quasar-galaxy clustering at z ~ 0.8
• Misclassified type 1 AGNs in the local universe
• The Most Massive Active Galactic Nuclei at $1\lesssim z\lesssim 2$
• An Extraordinary Scattered Broad Emission Line in a Type 2 QSO
• Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line
• Strong Response of the very broad h$\beta$ Emission Line in Luminous Radio-Quite Quasar pg1416-129
• The Metallicity of the Redshift 4.16 Quasar BR2248-1242
• Evolution of the Black Hole - Bulge Relationship in QSOs
• X-ray observations of powerful AGN outflows - implications for feedback
• A Limit Relation between Black Hole Mass and H$\beta$ Width: Testing Super-Eddington Accretion in Active Galactic Nuclei
• 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
• Strong Gravitational Lensing and the Structure of Quasar Outflows
• The relation between the optical spectral slope and the luminosity for 17 Palomar-Green QSOs
• Long-Term X-Ray spectral variability of the radio-loud NLS1 galaxy PKS 0558-504
• A numerical study of long-term multi-wavelength blazar variability
• Reverberation Mapping with Intermediate-Band Photometry: Detection of Broad-Line H$\alpha$ Time Lags for Quasars at $0.2<z<0.4$
• Quasi-simultaneous Spectroscopic and Multi-band Photometric Observations of Blazar S5 0716+714 during 2018-2019
• A catalog of quasar properties from the Baryon Oscillation Spectroscopic Survey
• UV spectral diagnostics for low redshift quasars: estimating physical conditions and radius of the Broad Line Region
• The size of BLRs of low luminous Active Galactic Nuclei
• Extending the Eigenvector 1 Space to the Optical Variability of Quasars
• The origin of the soft X-ray excess in the narrow-line Seyfert 1 galaxy SBS 1353+564
• A transition mass for black holes to show broad emission lines
• Lyman Alpha Constraints on Very Low Luminosity AGN
• Quasar main sequence in the UV plane
• Probing for evolutionary links between local ULIRGs and QSOs from NIR spectroscopy
• Discovery of a very Lyman-$\alpha$-luminous quasar at z=6.62
• Reverberation Mapping of PG 0934+013 with the Southern African Large Telescope
• On the Performance of Quasar Reverberation Mapping in the Era of Time-Domain Photometric Surveys
• Astrometric Reverberation Mapping
• A Tentative Size-Luminosity Relation for the Iron Emission-Line Region in Quasars
• Lensed Quasar Hosts
• Black hole masses of weak emission line quasars based on continuum fit method
• Identifying AGN's Balmer-Absorptions and stratified NLR kinematics in SDSSJ112611.63+425246.4
• The Complex Gaseous and Stellar environments of the nearby dual AGN Mrk 739
• Quasi-simultaneous observations of radio and X-ray variability in three radio-quiet Seyfert galaxies
• Timescales of Soft X-Ray Variability and Physical Constraints in Agns
• An Unobscured type II quasar candidate: SDSS J012032.19-005501.9
• Kinematics of the H$\alpha$ and H$\beta$ broad line region in an SDSS sample of type 1 AGNs
• A low-luminosity type-1 QSO sample: II. Tracing circumnuclear star formation in HE 1029-1831 with SINFONI
• Wavelength-resolved reverberation mapping of intermediate redshift quasars HE 0413-4031 and HE 0435-4312: Dissecting Mg II, optical Fe II, and UV Fe II emission regions
• UM 625 Revisited: Multiwavelength Study of A Seyfert 1 Galaxy with a Low-mass Black Hole
• The effect of the broad-line region with geometrical structures on gamma-ray absorption in blazars
• The relation between the mid-infrared emission and Black Hole Mass in Active Galactic Nuclei: A direct way to probe black hole growth?
• How many radio-loud quasars can be detected by the Gamma-Ray Large Area Space Telescope?
• X-ray Reverberation Mapping and Dramatic Variability of Seyfert 1 Galaxy 1H 1934-063
• MALS SALT-NOT survey of MIR-selected powerful radio-bright AGN at 0<z<3.5
• CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
• Locating positions of γ-ray--emitting regions in blazars
• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. I. Reverberation and Differential Interferometric Signals of Tightly Wound Cases
• Evidence for Polarized Synchrotron Components in Radio-Optical Aligned Quasars
• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. II. Loosely Wound Cases: Reverberation Properties
• The beamed jet and quasar core of the distant blazar 4C 71.07
• Modelling the AGN broad line region using single-epoch spectra I. The test case of Arp 151
• Reverberation-mapping of distant quasars: time-lag determination using different methods
• A test of the failed disk wind scenario for the origin of the broad line region in active galactic nuclei
• The Correlation Between Spectral Index And Accretion Rate For AGN
• Spectral variability of the 3C 390.3 nucleus for more than twenty years. I. Variability of the broad and narrow emission-line fluxes
• Wavelength-resolved Reverberation Mapping of quasar CTSC30.10: Dissecting MgII and FeII emission regions
• Unveiling slim accretion disc in AGN through X-ray and Infrared observations
• A Little Red Dot at $\mathbf{z}=7.3$ within a Large Galaxy Overdensity
• Rest-frame UV single-epoch black hole mass estimates of low-luminosity AGN at intermediate redshifts
• Estimating Black Hole Masses in Hundreds of Quasars
• [O III] emission line in narrow-line Seyfert 1 galaxies
• The host galaxy of OJ 287 revealed by optical and near-infrared imaging
• Active Galactic Nuclei at the Crossroads of Astrophysics
• Linear Spectropolarimetric Analysis of Fairall 9 with VLT/FORS2
• The eROSITA Final Equatorial Depth Survey (eFEDS): the hard X-ray selected sample
• First observation of double-peaked O I emission in the near-infrared spectrum of an active galaxy
• Discovery of soft and hard X-ray time lags in low-mass AGNs
• A Self-Consistent NLTE-Spectra Synthesis Model of FeLoBAL QSOs
• Final stage of merging binaries of supermassive black holes: observational signatures
• SDSS J154751.94+025550 with double-peaked broad Hβbut single-peaked broad Hα: a candidate for central binary black hole system?
• Outflow and metallicity in the broad-line region of low-redshift active galactic nuclei
• VLT/SINFONI study of black hole growth in high redshift radio-loud quasars from the CARLA survey
• Robotic reverberation mapping of the broad-line radio galaxy 3C 120
• Spectroscopy of broad absorption line quasars at $3\lesssim z\lesssim 5$ -- I: evidence for quasar winds shaping broad/narrow emission line regions
• Estimating black hole masses: Accretion disk fitting versus reverberation mapping and single epoch
• Hidden Broad-line Regions in Seyfert 2 Galaxies: from the spectropolarimetric perspective
• XMM observations of the narrow-line QSO PHL 1092: Detection of a high and variable soft component
• BLR size in Realistic FRADO Model: The role of shielding effect
• Getting More Out of Black Hole Superradiance: a Statistically Rigorous Approach to Ultralight Boson Constraints from Black Hole Spin Measurements
• The H$\alpha$ broadband photometric reverberation mapping of four Seyfert 1 galaxies
• Spectroscopic reverberation mapping of Quasar PKS 0736+017: Broad-Line Region and Black-hole Mass
• GALEX Measurements of the Big Blue Bump in Soft X-ray Selected AGN
• Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
• The rate of extreme coronal line emitting galaxies in the Sloan Digital Sky Survey and their relation to tidal disruption events
• Understanding AGN-host connection in partially obscured active galactic nuclei. Part III: Properties of ROSAT-selected SDSS AGNs
• The black hole mass versus velocity dispersion relation in QSOs/Active Galactic Nuclei: observational appearance and black hole growth
• Scale invariant jets: from blazars to microquasars
• Extragalactic Astronomy with the VLTI: a new window on the Universe
• The Smallest AGN Host Galaxies
• IRAS F13308+5946: A Possible Transition Phase From Type I ULIRG To Optical Quasar
• Multi-wavelength Campaign on the Super-Eddington NLS1 RX J0134.2-4258 -- I. Peculiar X-ray Spectra and Variability
• X-ray time lags in PG 1211+143
• Investigating the radio-loud phase of broad absorption line quasars
• Order and Chaos in a Three-dimensional Binary System of Interacting Galaxies
• Active Galactic Nuclei in the CNOC2 Field Galaxy Redshift Survey
• Variability of broad absorption lines in a QSO SDSS J022844.09+000217.0 on multi-year timescales
• Line and Continuum Variability in Active Galaxies
• The sizes of BLRs and BH masses of double-peaked broad low-ionization emission line objects
• An XMM-Newton Study of Six Narrow-Line Seyfert 1 Galaxies at z = 0.35--0.92
• Measuring time delays: I. Using a flux time series that is a linear combination of time-shifted light curves
• Role of Feedback in AGN-HOST Coevolution: A Study from Partially Obscured Active Galactic Nuclei
• A correction method for the telluric absorptions and application to Lijiang Observatory
• A fast test for the identification and confirmation of massive black hole binaries
• Supermassive Black Hole Masses in Type II Active Galactic Nuclei with Polarimetric Broad Emission Lines
• Near-Infrared Spectroscopy of Quasars at z~3 and Estimates of Their Supermassive Black Hole Masses
• Blue, Green, and Red Bumps in AGN
• The Nature of the UV/X-Ray Absorber in PG 2302+029
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• B3\,0749+460A: A New "Changing-Look" Active Galactic Nucleus Associated with X-ray Spectral Slope Variations
• The Centimeter to Submillimeter Broad Band Radio Spectrum of the Central Compact Component in A Nearby Type-II Seyfert Galaxy NGC 1068
• A Study of Active Galactic Nuclei in Low Surface Brightness Galaxies with Sloan Digital Sky Survey Spectroscopy
• Suspended and restored activities of A Nearby Super Massive Black Hole
• On the peculiar properties of the narrow-line quasar PG 1543+489
• Constraining broad-line regions from time lags of broad emission lines relative to radio emission
• A Direct Linkage Between AGN Outflows in The Narrow-line Regions and The X-ray Emission From The Accretion disks
• Correlation between Line Width and Line Flux of Double-Peaked Broad Halpha of 3C390.3
• A Spectroscopic and Photometric Study of Short-Timescale Variability in NGC5548
• A candidate of binary black hole system in AGN with broad Balmer emission lines having quite different line widths
• A study of the 15 micron quasars in the ELAIS N1 and N2 fields
• Complex Optical/UV and X-ray Variability of the Seyfert 1 galaxy 1H 0419-577
• Measuring the black hole mass in Ultraluminous X-ray Sources with the X-ray Scaling Method
• Exploring the Link between the X-ray Power Spectra and Energy Spectra of Active Galactic Nuclei
• Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping:Monte Carlo Simulations
• Broadband Photometric Reverberation Mapping Analysis on SDSS-RM and Stripe 82 Quasars
• Properties of radio-loud quasars in Sloan Digital Sky Survey
• The AGN Hubble Diagram and Its Implications for Cosmology
• The long-term broad-line responsivity in MKN 110
• No Evidence for [O III] Variability in Mrk 142
• The Suzaku broadband X-ray spectrum of the dwarf Seyfert galaxy NGC4395
• Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei: II. Merged Broad Line Regions
• Gemini Near Infrared Spectrograph - Distant Quasar Survey: Prescriptions for Calibrating UV-Based Estimates of Supermassive Black Hole Masses in High-Redshift Quasars
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• Nature and Origins of Rich Complexes of C IV Associated Absorption Lines
• Eddington Ratios of Dust-obscured Quasars at $z\lesssim 1$: Evidence Supporting Dust-obscured Quasars as Young Quasars
• M94 As A Unique Testbed for Black Hole Mass Estimates and AGN Activity At Low Luminosities
• An extreme gravitationally redshifted iron line at 4.8 keV in Mrk 876
• Estimating black hole masses in obscured AGN using X-rays
• An observational link between AGN Eddington ratio and [NII]λ6583/Ha at 0.6<z<1.7
• The radio luminosity, black hole mass and Eddington ratio for quasars from the Sloan Digital Sky Survey
• Toward Precision Measurement of Central Black Hole Masses
• Resolving the Structure at the Heart of BAL Quasars Through Microlensing Induced Polarisation Variability
• Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. II. Measuring Geometric Distances and Black Hole Masses of Four Nearby Quasars
• Is the anti-correlation between the X-ray variability amplitude and black hole mass of AGNs intrinsic?
• In quest of axionic hairs in quasars
• A novel Bayesian approach for decomposing the radio emission of quasars: II. Link between quasar radio emission and black hole mass
• A population of Optically Quiescent Quasars from WISE and SDSS
• On the need of an ultramassive black hole in OJ 287
• Rapidly spinning massive black holes in active galactic nuclei: evidence from the black hole mass function
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• Measuring the Virial Factor in SDSS DR5 Quasars with Redshifted H$\beta$ and Fe ii Broad Emission Lines
• Comprehensive view on a $z\sim 6.5$ radio-loud QSO: from the radio to the optical/NIR to the X-ray band
• SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line
• The Sloan Digital Sky Survey Reverberation Mapping Project: Photometric g and i Light Curves
• Supermassive Black Hole Mass Regulated by Host Galaxy Morphology
• Optical spectroscopic classification of 35 hard X-ray sources from the Swift-BAT 70-month catalogue
• Strong Lensed QSOs with Variability Detectable by LSST: How many are there?
• More Evidence for the Intermediate Broad Line Region of the Mapped AGN PG 0052+251
• First black hole mass estimation for the quadruple lensed system WGD2038-4008
• High-redshift quasar selection from the CFHQSIR survey
• Evidence for anisotropic motion of the clouds in broad-line regions of BL Lacertae objects
• Black-hole masses of type 1 AGN in the XMM-Newton bright serendipitous survey
• On the Structure of the AGN Torus through the Fraction of Optically-Selected Type 1 AGNs
• Exploring possible relations between optical variability time scales and broad emission line shapes in AGN
• A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
• High-$z$ Universe probed via Lensing by QSOs (HULQ) I. Number Estimates of QSO-QSO and QSO-Galaxy Lenses
• The Deviation of the Broad-line Region Size Between Reverberation Mapping and Spectroastrometry
• The high energy view of blazars
• Development of SED Camera for Quasars in Early Universe (SQUEAN)
• The hypothesis of the dust origin of the Broad Line Region in Active Galactic Nuclei
• Composite reverberation mapping
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• The broad-band spectrum of the Narrow-line Seyfert 1 NGC 4748: from UV to hard X-ray
• Broadband spectral and temporal study of Ton 599 during the brightest January 2023 flare
• AGN mass estimates in large spectroscopic surveys: the effect of host galaxy light
• Constraints on black hole spins with a general relativistic accretion disk corona model
• Testing compact massive black hole binary candidates through multi-epoch spectroscopy
• Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping
• The ${\sigma }_{\mathrm{H}\beta }$-based dimensionless accretion rate and its connection with the corona for AGN
• The Awakening Beast in the Seyfert 1 Galaxy KUG 1141+371 I
• The variability of the broad-line Balmer decrement for quasars from the Sloan Digital Sky Survey Reverberation Mapping
• Are broad optical balmer lines from central accretion disk in PG 1613+658?
• Host Galaxies of Hard X-ray Selected Type-2 Active Galactic Nuclei at Intermediate Redshifts
• Super-Eddington accreting massive black holes explore high-$z$ cosmology: Monte-Carlo simulations
• Probing the He II re-Ionization ERa via Absorbing C IV Historical Yield (HIERACHY) I: A Strong Outflow from a z~4.7 Quasar
• Measurement of the supermassive black hole masses in two active galactic nuclei by the photometric reverberation mapping method
• Sub-millimeter Detected z~2 Radio-quiet QSOs: Accurate Redshifts, Black Hole Masses, and Inflow/Outflow Velocities
• Long-term optical and $\gamma -$ray variability of the blazar PKS~1222+216
• The Wind Dynamics of Super-Eddington Sources in FRADO
• The Performance of Photometric Reverberation Mapping at High Redshift and the Reliability of Damped Random Walk Models
• Multiwavelength campaign on Mrk 509. XVI. Continued HST/COS monitoring of the far-ultraviolet spectrum
• Revisiting Emission-Line Measurement Methods for Narrow-Line Active Galactic Nuclei
• Evidence for microlensing by primordial black holes in quasar broad emission lines
• Measuring the Virial Factor in SDSS DR7 AGNs with Redshifted H$\beta$ and H$\alpha$ Broad Emission Lines
• X-ray Eclipses of Active Galactic Nuclei
• Spatially-resolved spectroscopy of narrow-line Seyfert 1 host galaxies
• Variability of Broad and Blueshifted Component of [OIII]$\lambda$5007 in IZWI
• Optical spectral index - luminosity relation for the 17 mapped Palomar-Green quasars
• Powerful Radio Emission From Low-mass Supermassive Black Holes Favors Disk-like Bulges
• JWST Discovery of a High-Redshift Tidal Disruption Event Candidate in COSMOS-Web
• Medium Resolution Near-Infrared Spectra of the Host Galaxies of Nearby Quasars
• AGN Reverberation Mapping
• Differential interferometry of close binary of supermassive black holes in an elliptical configuration
• Line shape variability in a sample of AGN with broad lines
• Spectral principal component analysis of mid-infrared spectra of a sample of PG QSOs
• Large-amplitude rapid X-ray variability in the narrow-line Seyfert 1 galaxy PG 1404$+$226
• A possible bias on the estimate of Lbol/Ledd in AGN as a function of luminosity and redshift
• Analyzing temporal variations of AGN emission line profiles in the context of (dusty) cloud structure formation in the broad line region
• The Great Slump: Mrk926 reveals discrete and varying Balmer line satellite components during a drastic phase of decline
• Discovery of Hidden Blazars
• A Pixon-Based Method for Reverberation-mapping Analysis in Active Galactic Nuclei
• Unveiling the monster heart: unbeamed properties of blazar 4C 71.07
• SDSS spectroscopy for blazars in the $Fermi$ LAT bright AGN sample
• The origin of X-ray emission in 3CRR sources: hints from mid-infrared Spitzer observations
• Quasar Host Galaxies and the $M_{SMBH}$ - ${\sigma }_{\ast }$ Relation
• H$\beta$ line shape and radius-luminosity relation in 2.5D FRADO
• Gravitational microlensing of quasar Broad Line Regions: the influence of fractal structures
• Growth of supermassive black holes and metallicity in quasars
• Spectral Energy Distribution Variations of Nearby Seyfert Galaxies During AGN Watch Monitoring Programs
• X-ray absorption in Compton-thin AGN: the predictions of a model revisited
• Characterization of the continuum and kinematical properties of nearby NLS1
• High frequency breaks in optical active galactic nuclei power spectral density
• The Variability of the Narrow-line Seyfert 1 Galaxies from the PanSTARRS's View
• Rapidly Spinning Black Holes in Quasars: An Open Question
• Revisiting Correlations Between Broad-Line and Jet Emission Variations for AGNs: 3C 120 and 3C 273
• On Variation of Light Curves and Broad Emission Lines for Periodic QSOs from co-rotating Supermassive binary black holes in elliptical orbits
• XMM-Newton, Swift and ROSAT observations of LBQS 0102-2713
• Signatures of regular black holes from the quasar continuum spectrum
• Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
• Searching for signatures of Fe II atomic processes in spectra of active galactic nuclei
• JWST's PEARLS: A z=6 quasar in a train-wreck galaxy merger system
• Super-Eddington accretion in the Q2237+0305 quasar?
• An optical perspective on early-stage AGN with extreme radio flares
• Searching for Low-Redshift Hot Dust-Obscured Galaxies
• A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Hα Emission
• Understanding the AGN-Host Connection in Broad Mgii Emission Selected AGN-Host Hybrid Qausars
• Hard X-Ray broadband spectroscopy of Mrk 876: characterizing its spectrum
• Black Hole masses for 14 gravitational lensed quasars
• Active Galaxies in the UV
• Exploring accretion disc physics and black hole growth with regular monitoring of ultrafast AGN winds
• Stellar Envelopes as Sources of Broad Line Region Emission: New Possibilities Allowed
• Modelling the variable broad-band optical/UV/X-ray spectrum of PG1211+143: Implications for the ionized outflow
• Prospects for Measuring the Mass of Black Holes at High Redshifts with Resolved Kinematics Using Gravitational Lensing
• On the orientation of Narrow Line Seyfert I
• The Additional Line Component within the Iron KαProfile in MCG-6-30-15: Evidence for Blob Ejection?
• Hints of correlation between broad-line and radio variations for 3C 120
• Low-mass and High-mass Supermassive Blackholes In Radio-Loud AGNs Are Spun-up in Different Evolution Paths
• Shedding the envelope: JWST reveals a kiloparsec-scale [OIII]-weak Balmer shell around a z=7.64 quasar
• Variations of Broad Emission Lines from periodicity QSOs under the interpretation of supermassive binary black holes with misaligned circumbinary broad line regions
• Kinematics and Structure of Clumps in Broad-line Regions in Active Galactic Nuclei
• The black hole masses of extremely luminous radio-WISE selected galaxies
• Uncertainty Quantification of the Virial Black Hole Mass with Conformal Prediction
• The comparison of optical variability of broad-line Seyfert 1 and narrow-line Seyfert 1 galaxies from the view of Pan-STARRS
• SDSS J143030.22-001115.1: A misclassified narrow-line Seyfert 1 galaxy with flat X-ray spectrum
• Polarimetric Reverberation Mapping in Medium-Band Filters
• Ionization Driven Fragmentation of Gas Outflows Responsible for FeLoBALs in Quasars
• Comparing Reflection and Absorption Models for the Soft X-ray Variability in the NLS1 AGN UGC 11763
• Estimating black hole masses of blazars
• A Broad Absorption Line Outflow Associated with the Broad Emission Line Region in the Quasar SDSS J075133.35+134548.3
• Hydrogen Balmer Emission Lines and the Complex Broad Line Region Structure
• Rarefied Broad-Line Regions in Active Galactic Nuclei: Anomalous Responses in Reverberation Mapping and Implications for Weak Emission-Line Quasars
• Supermassive black holes with higher Eddington ratios preferentially form in gas-rich galaxies
• Leaked Lya emission: an indicator of the size of quasar absorption outflows
• A physical model for radiative, convective dusty disk in AGN
• HARMONI view of the host galaxies of active galactic nuclei around cosmic noon: Resolved stellar morpho-kinematics and the M${}_{BH}$-${\sigma }_{\star }$ relation
• Exploring the quasar disc-wind-jet connection with LoTSS and SDSS
• Swift, NuStar and XMM-Newton observations of the NLS1 galaxy RX J2317.8-4422 in an extreme X-ray low flux state
• First Detection of 12CO (1--0) Emission from Two Narrow-Line Seyfert 1 Galaxies
• Modeling the Reverberation Response of the Broad Line Region in Active Galactic Nuclei II: Incorporating Photoionization Models
• The broad band SEDs of four 'hypervariable' AGN
• Intra-night optical variability and radio characteristics of extremely radio-loud narrow-line Seyfert 1 galaxies
• The Quasar Candidates Catalogs of DESI Legacy Imaging Survey Data Release 9
• On estimators of the jet bolometric luminosity of Fermi 2LAC blazars
• Can a time evolving, asymmetric broad line region mimic a massive black hole binary?
• Ultradense Gases beyond Dusty Torus in a Partially Obscured Quasar
• OzDES Reverberation Mapping Program: Stacking analysis with H$\beta$, Mg II and C IV
• Quasar Main Sequence unfolded by 2.5D FRADO (Natural expression of Eddington ratio, black hole mass, and inclination)
• Strong Optical and UV Intermediate-Width Emission Lines in the Quasar SDSS J232444.80-094600.3: Dust-Free and Intermediate-Density Gas at the Skin of Dusty Torus ?
• Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K$\alpha$ X-ray Line Flux Variations Using Photo-Ionization Simulations
• The Relation between the Inclinations of Broad Line Regions and the Accretion Disk
• Exploring the disc-jet scenario in 3C 273 using simultaneous XMM-Newton and NuSTAR observations
• Black-hole mass estimation through accretion disk spectral fitting for high-redshift blazars
• Long-term X-ray variability of quasars in the Lockman Hole field observed with ROSAT
• New black hole mass calibrations and the fundamental plane of the broad-line region size, luminosity, and velocity
• Optical Spectroscopy of Four Young Radio Sources
• Identifying Changing-Look AGN Transitions in Light Curve Data with the Zwicky Transient Facility
• Hunting for the nature of the enigmatic narrow-line Seyfert 1 galaxy PKS 2004-447
• Super-Accreting Active Galactic Nuclei as Neutrino Sources
• The study of the circumnuclear environment of accreting supermassive black holes with realistic X-ray spectral models
• Dusty origin of the Broad Line Region in active galaxies
• The first supermassive black hole mass measurement in active galactic nuclei using the polarization of broad emission line Mg II
• Correcting the Contamination of Second-order Spectra: Improving Hα Measurements in Reverberation Mapping Campaigns
• Reverberation Mapping of Two Luminous Quasars: the Broad-line Region Structure and Black Hole Mass
• Distances on Cosmological Scales with VLTI
• Physical parameters and classification of eight galactic nuclei from the Second Byurakan Survey
• On the origin of core radio emissions from black hole sources in the realm of relativistic shocked accretion flow
• Uncertainties of the masses of black holes and Eddington ratios in AGN
• Quasar continuum spectrum disfavors black holes with a magnetic monopole charge
• Top-heavy stellar mass distribution in galactic nuclei inferred from the universally high abundance ratio of [Fe/Mg]
• Black Hole merger rates in the first billion years in light of JWST data
• Pinpointing the location of the gamma-ray emitting region in the FSRQ 4C+01.28
• Application of the space-based optical interferometer towards measuring cosmological distances of quasars
• The optical-infrared relation for active galactic nuclei: The role of contaminations
• The soft X-ray spectrum of PG1211+143
• Precision near-IR spectroscopy for understanding AGN physics and shed light on the H0 tension -- SHARP Science Book
• Spectroscopic confirmation of dual and offset quasars from the Subaru HSC-SSP program