X-ray Reverberation Mapping of Ark 564 using Gaussian Process Regression
arXiv:2210.01810 · doi:10.3847/1538-4357/ac978f
Abstract
Ark 564 is an extreme high-Eddington Narrow-line Seyfert 1 galaxy, known for being one of the brightest, most rapidly variable soft X-ray AGN, and for having one of the lowest temperature coronae. Here we present a 410-ks NuSTAR observation and two 115-ks XMM-Newton observations of this unique source, which reveal a very strong, relativistically broadened iron line. We compute the Fourier-resolved time lags by first using Gaussian processes to interpolate the NuSTAR gaps, implementing the first employment of multi-task learning for application in AGN timing. By fitting simultaneously the time lags and the flux spectra with the relativistic reverberation model RELTRANS, we constrain the mass at , although additional components are required to describe the prominent soft excess in this source. These results motivate future combinations of machine learning, Fourier-resolved timing, and the development of reverberation models.
arXiv comment19 pages, 9 figures. Accepted for publication in The Astrophysical Journal
References in corpus (61)
- On the Absorption of X-rays in the Interstellar Medium
- The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
- Local Supermassive Black Holes, Relics of Active Galactic Nuclei and the X-ray Background
- Broad-band gamma-ray and X-ray spectra of NGC 4151 and their implications for physical processes and geometry
- The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)
- Broad iron lines in Active Galactic Nuclei
- X-ray reflected spectra from accretion disk models. III. A complete grid of ionized reflection calculations
- X-ray reverberation around accreting black holes
- A Global Three Dimensional Radiation Magneto-hydrodynamic Simulation of Super-Eddington Accretion Disks
- Investigating a Fluctuating-accretion Model for the Spectral-timing Properties of Accreting Black Hole Systems
- On the X-ray time lags in the black hole candidates
- Numerical simulations of super-critical black hole accretion flows in general relativity
- Suzaku observations of 'bare' active galactic nuclei
- Flexible and Scalable Methods for Quantifying Stochastic Variability in the Era of Massive Time-Domain Astronomical Data Sets
- Discovery of a relation between black hole mass and soft X-ray time lags in active galactic nuclei
- A comparison of the hard ASCA spectral slopes of broad and narrow-line Seyfert 1 galaxies
- A global look at X-ray time lags in Seyfert Galaxies
- Reverberation mapping of Active Galactic Nuclei: from X-ray corona to dusty torus
- X-ray Reflection Spectroscopy of the Black Hole GX 339-4: Exploring the Hard State with Unprecedented Sensitivity
- Discovery of multiple Lorentzian components in the X-ray timing properties of the Narrow Line Seyfert 1 Ark 564
- Alternative explanations for extreme supersolar iron abundances inferred from the energy spectrum of Cygnus X-1
- Modelling the broad Fe Kα reverberation in the AGN NGC 4151
- Discovery of high-frequency iron K lags in Ark 564 and Mrk 335
- High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN
- A Revised Broad-Line Region Radius and Black Hole Mass for the Narrow-Line Seyfert 1 NGC 4051
- Black hole mass and velocity dispersion of narrow line region in active galactic nuclei and narrow line Seyfert 1 galaxies
- A public relativistic transfer function model for X-ray reverberation mapping of accreting black holes
- Spectral Analysis of 1H0707-495 with XMM-Newton
- Optically thick outflows in ultraluminous supersoft sources
- A dynamic black hole corona in an active galaxy through X-ray reverberation mapping
- Radiation spectra of warm and optically thick coronae in AGN
- Disk, Corona, Jet Connection in the Intermediate State of MAXI J1820+070 Revealed by NICER Spectral-Timing Analysis
- Exploring NLS1 through the physical properties of their hosts
- The high-Eddington NLS1 Ark 564 has the coolest corona
- Understanding Reverberation Lags in 1H0707-495
- Spectral variability and reverberation time delays in the Suzaku X-ray spectrum of NGC 4051
- Exploring The Effects Of Disk Thickness On The Black Hole Reflection Spectrum
- Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. III. Optical Observations and the Optical--UV--X-ray Connection
- XMM-Newton campaign on the ultraluminous X-ray source NGC 247 ULX-1: outflows
- Puffy accretion disks: sub-Eddington, optically thick, and stable
- NLS1 galaxies and estimation of their central black hole masses from the X-ray excess variance method
- Disentangling Time Series Spectra with Gaussian Processes: Applications to Radial Velocity Analysis
- Multi-timescale X-ray reverberation mapping of accreting black holes
- Relativistic X-ray reverberation modelling of the combined time-averaged and lag-energy spectra in AGN
- Calculating Time Lags From Unevenly-Sampled Light Curves
- Discovery of Relativistic Outflow in the Seyfert Galaxy Ark 564
- Evolution of a Relativistic Outflow and X-ray Corona in the Extreme Changing-Look AGN 1ES 1927+654
- Gaussian Process Modelling of Asteroseismic Data
- Testing the Kerr nature of the supermassive black hole in Ark 564
- Modelling correlated variability in accreting black holes: the effect of high density and variable ionisation on reverberation lags
- Direct Measurement of the X-ray Time-Delay Transfer Function in Active Galactic Nuclei
- Multi-timescale reverberation mapping of Mrk 335
- Low frequency X-ray timing with Gaussian processes and reverberation in the radio-loud AGN 3C 120
- A Chandra HETGS observation of the Narrow-line Seyfert 1 galaxy Ark 564
- Modelling the Multiwavelength Variability of Mrk 335 using Gaussian Processes
- Using Gaussian processes to model light curves in the presence of flickering: the eclipsing cataclysmic variable ASASSN-14ag
- Soft Extragalactic X-Ray Binaries at the Eddington Threshold
- Ejection-accretion connection in NLS1 AGN 1H 1934-063
- Revealing a hard X-ray spectral component that reverberates within one light hour of the central supermassive black hole in Ark 564
- Timescales of Soft X-Ray Variability and Physical Constraints in Agns
- Testing The Lamp-Post and Wind Reverberation Models with XMM-Newton Observations of NGC 5506
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- Investigating the impact of vertically extended coronae on X-ray reverberation mapping
- AGN STORM 2. VII. A Frequency-resolved Map of the Accretion Disk in Mrk 817: Simultaneous X-ray Reverberation and UVOIR Disk Reprocessing Time Lags
- X-ray/UVOIR Frequency-resolved Time Lag Analysis of Mrk 335 Reveals Accretion Disk Reprocessing
- Effects of ultra-fast outflows on X-ray time lags in AGN
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