Time delay measurement of Mg II line in CTS C30.10 with SALT

Abstract

We report 6 yr monitoring of a distant bright quasar CTS C30.10 (z = 0.90052) with the Southern African Large Telescope (SALT). We measured the rest-frame time-lag of $562\pm 2$ days between the continuum variations and the response of the Mg II emission line, using the Javelin approach. More conservative approach, based on five different methods, imply the time delay of $564_{-71}^{+109}$ days. This time delay, combined with other available measurements of Mg II line delay, mostly for lower redshift sources, shows that the Mg II line reverberation implies a radius-luminosity relation very similar to the one based on a more frequently studied H$\beta$ line.

submitted to ApJ; comments welcome

References in corpus (44)

• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• A Catalog of Quasar Properties from SDSS DR7
• Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
• Modeling the Time Variability of SDSS Stripe 82 Quasars as a Damped Random Walk
• On Uncertainties in Cross-Correlation Lags and the Reality of Wavelength-Dependent Continuum Lags in Active Galactic Nuclei
• Systematic Effects in Measurement of Black Hole Masses by Emission-Line Reverberation of Active Galactic Nuclei: Eddington Ratio and Inclination
• Quantifying Quasar Variability As Part of a General Approach To Classifying Continuously Varying Sources
• An Alternative Approach To Measuring Reverberation Lags in Active Galactic Nuclei
• Is Quasar Optical Variability a Damped Random Walk?
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• A Robust Determination of the Time Delay in 0957+561A,B and a Measurement of the Global Value of Hubble's Constant
• Spatially resolved rotation of the broad-line region of a quasar at sub-parsec scale
• Kepler Observations of Rapid Optical Variability in Active Galactic Nuclei
• Black Hole Growth to z = 2 - I: Improved Virial Methods for Measuring M_BH and L/L_Edd
• The Sloan Digital Sky Survey Reverberation Mapping Project: H$\alpha$ and H$\beta$ Reverberation Measurements From First-year Spectroscopy and Photometry
• Estimating Black Hole Masses in Active Galactic Nuclei Using the MgII 2800 Emission Line
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX 10 New Observations of Reverberation Mapping and Shortened H$\beta$ Lags
• The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. V. A New Size-Luminosity Scaling Relation for the Broad-Line Region
• Revisiting Stochastic Variability of AGNs with Structure Functions
• The Sloan Digital Sky Survey Reverberation Mapping Project: First Broad-line Hbeta and MgII Lags at z>~0.3 from six-Month Spectroscopy
• The effect of nuclear gas distribution on the mass determination of supermassive black holes
• Pan-STARRS1 variability of XMM-COSMOS AGN. II. Physical correlations and power spectrum analysis
• NGC 5548 in a Low-Luminosity State: Implications for the Broad-Line Region
• The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151
• Reverberation Mapping of Luminous Quasars at High-z
• Kinematics of the Broad-line Region of 3C 273 from a Ten-year Reverberation Mapping Campaign
• Dependence of the optical/UV variability on the emission line properties and Eddington ratio in active galactic nuclei
• Application of Stochastic Modeling to Analysis of Photometric Reverberation Mapping Data
• The structure of the Mg II broad line emitting region in Type 1 AGNs
• Towards equation of state of dark energy from quasar monitoring: Reverberation strategy
• Power density spectrum of NGC 5548 and the nature of its variability
• Calibration and Limitations of the Mg II line-based Black Hole Masses
• Swift/UVOT grism monitoring of NGC 5548 in 2013: an attempt at MgII reverberation mapping
• Variability of accretion flow in the core of the Seyfert galaxy NGC 4151
• Short time-scale optical variability properties of the largest AGN sample observed with Kepler/K2
• Methods of Reverberation Mapping. I. Time-lag Determination by Measures of Randomness
• On the absence of broad MgII emission-line variability in NGC 3516 during 1996
• Relation between the variations in the MgII $\lambda 2798$ emission-line and the 3000 Å continuum
• SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line
• SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line

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• The Sloan Digital Sky Survey Reverberation Mapping Project: Estimating Masses of Black Holes in Quasars with Single-Epoch Spectroscopy
• The Sloan Digital Sky Survey Reverberation Mapping Project: MgII Lag Results from Four Years of Monitoring
• Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard Star Fields
• Understanding Broad Mg II Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-Look Quasars
• A parallax distance to 3C 273 through spectroastrometry and reverberation mapping
• On Reverberation Mapping Lag Uncertainties
• Monitoring AGNs with H$\beta$ Asymmetry. III. Long-term Reverberation Mapping Results of 15 Palomar-Green Quasars
• Time Delay of MgII Emission Response for the Luminous Quasar HE 0435-4312: Towards Application of High-Accretor Radius-Luminosity Relation in Cosmology
• Time-delay measurement of MgII broad line response for the highly-accreting quasar HE 0413-4031: Implications for the MgII-based radius-luminosity relation
• The picture of BLR in 2.5-D FRADO: Dynamics & Geometry
• The CaFe Project: Optical Fe II and Near-Infrared Ca II triplet emission in active galaxies -- simulated EWs, the co-dependence of cloud sizes and metal content
• Current and future applications of Reverberation-mapped quasars in Cosmology
• OzDES Reverberation Mapping Program: The first Mg II lags from five years of monitoring
• Flare-like Variability of the Mg~II $\lambda$2798 Å Emission Line and UV Fe~II band in the Blazar CTA~102
• Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances
• Spectral Variability of a Sample of Extreme Variability Quasars and Implications for the MgII Broad-line Region
• Scatter Analysis Along the Multidimensional Radius-Luminosity Relations for Reverberation-Mapped Mg II Sources
• Consistency study of high- and low-accreting Mg ii quasars: No significant effect of the Fe ii to Mg ii flux ratio on the radius-luminosity relation dispersion
• Expectations for time-delay measurements in active galactic nuclei with the Vera Rubin Observatory
• Accretion disks, quasars and cosmology: meandering towards understanding
• High Eddington quasars as discovery tools: current state and challenges
• Caltech-NRAO Stripe 82 Survey (CNSS). IV. The Birth of Radio-loud Quasar 013815+00
• Wavelength-resolved reverberation mapping of intermediate redshift quasars HE 0413-4031 and HE 0435-4312: Dissecting Mg II, optical Fe II, and UV Fe II emission regions
• Wavelength-resolved Reverberation Mapping of quasar CTSC30.10: Dissecting MgII and FeII emission regions
• Reverberation-mapping of distant quasars: time-lag determination using different methods
• Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from MgII and CIV reverberation-mapped quasar data
• Broad-line region in active galactic nuclei: Dusty or dustless?
• BLR size in Realistic FRADO Model: The role of shielding effect
• UV Fe II emission model of HE 0413-4031 and its relation to broad-line time delays
• Spectroscopy and polarimetry of the gravitationally lensed quasar Q0957+561
• Observational window effects on multi-object Reverberation Mapping
• Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
• H$\beta$ line shape and radius-luminosity relation in 2.5D FRADO
• Continuum polarization reverberation mapping of AGNs
• Amoeba: An AGN Model of Optical Emissions Beyond steady-state Accretion discs
• OzDES Reverberation Mapping Program: Stacking analysis with H$\beta$, Mg II and C IV
• A broad-line quasar with unexplained extreme velocity offsets: post-shock outflow?
• The optical-infrared relation for active galactic nuclei: The role of contaminations
• The first supermassive black hole mass measurement in active galactic nuclei using the polarization of broad emission line Mg II