A Search for X-ray/UV Correlation in the Reflection-Dominated Seyfert 1 Galaxy Mrk 1044

Abstract

Correlated variability between coronal X-rays and disc optical/UV photons provides a very useful diagnostic of the interplay between the different regions around an active galactic nucleus (AGN) and how they interact. AGN that reveal strong X-ray reflection in their spectra should normally exhibit optical/UV to X-ray correlation consistent with reprocessing -- where the optical/UV emission lag behind the X-rays. While such correlated delay has been seen in some sources, it has been absent in others. \rm{Mrk~1044} is one such source that has been known to reveal strong X-ray reflection in its spectra. In our analysis of three long \textit{XMM-Newton} and several \textit{Swift} observations of the source, we found no strong evidence for correlation between its UV and X-ray lightcurves both on short and long time scales. Among other plausible causes for the non-detection, we posit that higher X-ray variability than UV and strong general relativistic effects close to the black hole may also be responsible. We also present results from the spectral analysis based on \textit{XMM-Newton} and \textit{NuSTAR} observations, which show the strong soft X-ray excess and iron K$\alpha$ line in the 0.3--50 keV spectrum that can be described by relativistic reflection.

Accepted for Publication in APJ, 13 pages, 11 figures, 2 tables

References in corpus (25)

• An online repository of Swift/XRT light curves of GRBs
• The role of the reflection fraction in constraining black hole spin
• Universal bolometric corrections for AGN over 7 luminosity decades
• Is Quasar Optical Variability a Damped Random Walk?
• Space Telescope and Optical Reverberation Mapping Project. II. Swift and HST Reverberation Mapping of the Accretion Disk of NGC 5548
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IV. H$\beta$ Time Lags and Implications for Super-Eddington Accretion
• Swift monitoring of NGC 5548: X-ray reprocessing and short term UV/optical variability
• Driving extreme variability: The evolving corona and evidence for jet launching in Markarian 335
• The Comptonisation of accretion disc X-ray emission: Consequences for X-ray reflection and the geometry of AGN coronae
• An investigation of the origin of soft X-ray excess emission from Narrow-line Seyfert 1 galaxies Akn564 and Mrk1044
• Ultraviolet and X-ray variability of active galactic nuclei with Swift
• The soft X-ray excess: NLS1s vs. BLS1s
• A hard look at thermal reverberation and optical/UV lags in NGC 5548
• Correlated X-ray and Optical Variability in Mkn 509
• The Close AGN Reference Survey (CARS): IFU survey data and the BH mass dependence of long-term AGN variability
• Correlated X-ray/UV/optical variability and the nature of accretion disc in the bare Seyfert 1 galaxy Fairall~9
• A deep X-ray view of the bare AGN Ark 120. III. X-ray timing analysis and multiwavelength variability
• NuSTAR observation of Ark 564 reveals the variation of coronal temperature with flux
• Spectral and Time Series Analyses of the Seyfert 1 AGN: Zw 229.015
• UV to X-ray Comptonization delay in Mrk 493
• Complex UV/X-ray variability of 1H~0707-495
• An XMM-Newton Study of Six Narrow-Line Seyfert 1 Galaxies at z = 0.35--0.92
• Complex optical/UV and X-ray variability in Seyfert 1 galaxy Mrk 509
• Complex Optical/UV and X-ray Variability of the Seyfert 1 galaxy 1H 0419-577
• Correlated variability of the reflection fraction with the X-ray flux and spectral index for Mkn 478

Cited by in corpus (2)

• Flares in the Changing Look AGN Mrk 590. II: Deep X-ray observations reveal a Comptonizing inner accretion flow
• Spectro-polarimetric study to constrain accretion-ejection properties of MCG-5-23-16 using IXPE and NuSTAR observations