OzDES Reverberation Mapping Program: Lag recovery reliability for 6-year CIV analysis

Abstract

We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customisable simulations that mimic the characteristics of each source in the OzDES sample. These characteristics include: the variability in the photometric and spectroscopic lightcurves, the measurement uncertainties, and the observational cadence. By simulating the sources in the OzDES sample that contain the CIV emission line, we developed a set of criteria that rank the reliability of a recovered time lag depending on the agreement between different recovery methods, the magnitude of the uncertainties, and the rate at which false positives were found in the simulations. These criteria were applied to simulated light curves and these results used to estimate the quality of the resulting Radius-Luminosity relation.We grade the results using three quality levels (gold, silver and bronze). The input slope of the R-L relation was recovered within $1\sigma$ for each of the three quality samples, with the gold standard having the lowest dispersion with a recovered a R-L relation slope of $0.454\pm 0.016$ with an input slope of 0.47. Future work will apply these methods to the entire OzDES sample of 771 AGN.

arXiv comment16 pages, 15 figures, accepted for publication in NMRAS

References in corpus (47)

• 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
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• A Catalog of Quasar Properties from SDSS DR7
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• The Dark Energy Survey: more than dark energy - an overview
• 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
• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements II. The Full Sample of Reverberation-Mapped AGNs
• The Black-Hole Mass in M87 from Gemini/NIFS Adaptive Optics Observations
• Black Hole Mass Estimates from Reverberation Mapping and from Spatially Resolved Kinematics
• The Lick AGN Monitoring Project: Broad-Line Region Radii and Black Hole Masses from Reverberation Mapping of Hbeta
• Reverberation Mapping of High-Luminosity Quasars: First Results
• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• Quantifying Quasar Variability As Part of a General Approach To Classifying Continuously Varying Sources
• The AGN Black Hole Mass Database
• Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies
• An Alternative Approach To Measuring Reverberation Lags in Active Galactic Nuclei
• Is Quasar Optical Variability a Damped Random Walk?
• Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. I. A Reverberation-Based Measurement of the Black Hole Mass
• Space Telescope and Optical Reverberation Mapping Project. III. Optical Continuum Emission and Broad-Band Time Delays in NGC 5548
• The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks
• Precise Black Hole Masses From Megamaser Disks: Black Hole-Bulge Relations at Low Mass
• The Sloan Digital Sky Survey Reverberation Mapping Project: H$\alpha$ and H$\beta$ Reverberation Measurements From First-year Spectroscopy and Photometry
• Reverberation Mapping Results for Five Seyfert 1 Galaxies
• The Sloan Digital Sky Survey Reverberation Mapping Project: Technical Overview
• The Mass of the Central Black Hole in the Seyfert Galaxy NGC 3783
• Variability of Active Galactic Nuclei
• The Sloan Digital Sky Survey Reverberation Mapping Project: Initial CIV Lag Results from Four Years of Data
• OzDES multi-fibre spectroscopy for the Dark Energy Survey: first-year operation and results
• The Lick AGN Monitoring Project 2011: Reverberation Mapping of Markarian 50
• Reverberation Mapping of Luminous Quasars at High-z
• The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151
• OzDES multifibre spectroscopy for the Dark Energy Survey: Three year results and first data release
• First Cosmology Results using Type Ia Supernova from the Dark Energy Survey: Simulations to Correct Supernova Distance Biases
• Quasar Accretion Disk Sizes From Continuum Reverberation Mapping From the Dark Energy Survey
• OzDES multi-object fibre spectroscopy for the Dark Energy Survey: Results and second data release
• The Sloan Digital Sky Survey Reverberation Mapping Project: MgII Lag Results from Four Years of Monitoring
• Accretion Disc Time Lag Distributions: Applying CREAM to Simulated AGN Light Curves
• Simulations of the OzDES AGN Reverberation Mapping Project
• CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)
• On Reverberation Mapping Lag Uncertainties
• Time Delay of MgII Emission Response for the Luminous Quasar HE 0435-4312: Towards Application of High-Accretor Radius-Luminosity Relation 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
• The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline

Cited by in corpus (10)

• Standardizing reverberation-measured C IV time-lag quasars, and using them with standardized Mg II quasars to constrain cosmological parameters
• The LSST era of supermassive black holes accretion-disk reverberation mapping
• Constraining quasar structure using high-frequency microlensing variations and continuum reverberation
• TiDES: The 4MOST Time Domain Extragalactic Survey
• Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from MgII and CIV reverberation-mapped quasar data
• Wavelength-resolved Reverberation Mapping of quasar CTSC30.10: Dissecting MgII and FeII emission regions
• Spectroscopic reverberation mapping of Quasar PKS 0736+017: Broad-Line Region and Black-hole Mass
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• Observational window effects on multi-object Reverberation Mapping
• OzDES Reverberation Mapping Program: Stacking analysis with H$\beta$, Mg II and C IV