Continuum reverberation mapping of MCG 08-11-011

Abstract

We report the results from a photometric reverberation mapping campaign carried out with the C18 telescope at the Wise Observatory from 2019 to 2020, targeting the active galactic nucleus (AGN) MCG 08-11-011. The monitoring was conducted on a daily basis with specially designed narrow-band filters, spanning from optical to near-infrared wavelengths ($\sim 4000$ to $8000$Å) and avoiding prominent broad emission lines. We aim to measure inter-band continuum time lags, determine the size-wavelength relation, and estimate the host-subtracted AGN luminosity for this system. We used the point-spread function photometry to extract the continuum light curves and measure the inter-band time lags using several methods, including the interpolated cross-correlation function, the z-transformed discrete correlation function, a von Neumann estimator, JAVELIN (in spectroscopic and photometric mode), MICA, and a multivariate correlation function. We find wavelength-dependent lags, $\tau (\lambda )$, up to $\sim$7 days between the multiband light curves of MCG 08-11-011. The observed lags are larger than predictions based on standard thin-disk theory by a factor of $\sim 3-7$. We discern a significantly steeper ($\tau \propto {\lambda }^{4.74}$) size-wavelength relation than the $\tau \propto {\lambda }^{4/3}$ expected for a geometrically thin and optically thick accretion disk, which may result from the contribution of diffuse continuum emission to the flux. These results are similar to those found by previous continuum reverberation mapping campaigns.

arXiv commentarXiv admin note: text overlap with arXiv:2111.07385

References in corpus (47)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• 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 Rest-Frame Extreme Ultraviolet Spectral Properties of QSOs
• X-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180
• The Quasar Accretion Disk Size -- Black Hole Mass Relation
• The Quasar Accretion Disk Size - Black Hole Mass Relation
• 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?
• The Radiative Efficiency of Accretion Flows in Individual AGN
• Space Telescope and Optical Reverberation Mapping Project. III. Optical Continuum Emission and Broad-Band Time Delays in NGC 5548
• A Description of Quasar Variability Measured Using Repeated SDSS and POSS Imaging
• Space Telescope and Optical Reverberation Mapping Project. II. Swift and HST Reverberation Mapping of the Accretion Disk of NGC 5548
• Sizes and Temperature Profiles of Quasar Accretion Disks from Chromatic Microlensing
• A Near-Infrared Spectral Template for Quasars
• The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey
• X-ray iron line reverberation from black hole accretion disks
• Accretion disk reverberation with Hubble Space Telescope observations of NGC 4593: evidence for diffuse continuum lags
• Swift monitoring of NGC 4151: Evidence for a Second X-ray/UV Reprocessing
• Quantifying the impact of variable BLR diffuse continuum contributions on measured continuum inter-band delays
• Photometric AGN reverberation mapping - an efficient tool for BLR sizes, black hole masses and host-subtracted AGN luminosities
• Application of Stochastic Modeling to Analysis of Photometric Reverberation Mapping Data
• The Average Size and Temperature Profile of Quasar Accretion Disks
• Continuum Reverberation Mapping of the Accretion Disks in Two Seyfert 1 Galaxies
• Long-Term Optical Continuum Color Variability of Nearby Active Galactic Nuclei
• On the multi-wavelength variability of Mrk 110: Two components acting at different timescales
• A New Method for Measuring Extragalactic Distances
• Accretion Disk Sizes from Continuum Reverberation Mapping of AGN Selected from the ZTF Survey
• A Degeneracy in DRW Modelling of AGN Light Curves
• Reflected Iron Line From a Source Above a Kerr Black Hole Accretion Disc
• Frequency-resolved lags in UV/optical continuum reverberation mapping
• The Centurion 18 telescope of the Wise Observatory
• A Non-parametric Approach to Constrain the Transfer Function in Reverberation Mapping
• Probing the Broad Line Region and the Accretion Disk in the Lensed Quasars HE0435-1223, WFI2033-4723, and HE2149-2745 using Gravitational Microlensing
• Quasar Microlensing Variability Studies Favor Shallow Accretion Disk Temperature Profiles
• Quasar Cartography: from Black Hole to Broad Line Region Scales
• Methods of Reverberation Mapping. I. Time-lag Determination by Measures of Randomness
• Size of the accretion disk in the gravitationally lensed quasar SDSS J1004+4112 from the statistics of microlensing magnifications
• A Microlensing Accretion Disk Size Measurement in the Lensed Quasar WFI 2026-4536
• The luminosity-dependent contribution from the broad line region to the wavelength-dependent lags in Mrk 110
• Revealing the structure of the lensed quasar Q 0957+561: I. Accretion disk size
• Near infrared and optical continuum emission region size measurements in the gravitationally lensed quasars Q0957+561 and SBS0909+532
• Estimate of the Accretion Disk Size in the Gravitationally Lensed Quasar HE 0435-1223 using Microlensing Magnification Statistics
• Microlensing Analysis for the gravitational lens systems SDSS0924+0219, Q1355-2257, and SDSS1029+2623

Cited by in corpus (5)

• Diffuse emission in microlensed quasars and its implications for accretion-disk physics
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• The Host Galaxy Fluxes of Active Galaxy Nuclei Are Generally Overestimated by the Flux Variation Gradient Method
• HALO I: Photometric continuum reverberation mapping of Fairall 9
• Intensive X-ray/UVOIR continuum reverberation mapping of the Seyfert AGN MCG+08-11-11