Uncovering the primary X-ray emission and possible starburst component in the polarized NLS1 Mrk 1239

Abstract

X-ray observations of the unique NLS1 galaxy Mrk 1239 spanning 18-years are presented. Data from XMM-Newton, Suzaku, Swift and NuSTAR are combined to obtain a broad-band, multi-epoch view of the source. There is spectral variability in the 3-10 keV band over the 18-years. An analysis of the NuSTAR and Suzaku light curves also suggests rapid variability in the 3-10 keV band, which is consistent with the NLS1 definition of the source. However, no variability is seen below 3 keV on any timescale. Two distinct physical models are adopted to describe the data above and below ~3 keV. The low energies are dominated by a hot, diffuse gas likely associated with a starburst component at large physical scales. The higher energy spectrum is dominated by emission from the central region. Ionised partial covering and relativistic blurred reflection are considered for the central region emission. In both cases, the underlying power law has a photon index of $\Gamma \sim 2.3-2.4$. A distant reflector, a neutral partial covering component with a covering fraction near $\sim 1$, and contributions from starburst emission are always required. The blurred reflection model requires a reflection dominated spectrum, which may be at odds with the low emissivity index and radio properties of the source. By contrast, the two absorption components required in the ionised partial covering model may correspond to the two distinct regions of polarization observed in the optical. Regardless of the physical model, spectral changes between epochs are driven by the absorption components and on short time scales by intrinsic AGN variability.

arXiv commentAccepted for publications in ApJ. 17 pages

References in corpus (47)

• On the Absorption of X-rays in the Interstellar Medium
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
• Calibration of X-ray absorption in our Galaxy
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• A light bending model for the X-ray temporal and spectral properties of accreting black holes
• Optimal binning of X-ray spectra and response matrix design
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: II. Spectral Analysis and Correlations
• The Simultaneous Optical-to-X-ray Spectral Energy Distribution of Soft X-ray Selected AGN observed by Swift
• CAIXA: a catalogue of AGN in the XMM-Newton archive III. Excess Variance Analysis
• A statistical relation between the X-ray spectral index and Eddington ratio of active galactic nuclei in deep surveys
• X-ray Reflection By Photoionized Accretion Discs
• On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium
• X-ray reflection in the NLS1 1H 0707-495
• An XMM-Newton hard X-ray survey of ULIRGs
• Enhanced Star Formation in Narrow Line Seyfert 1 AGN revealed by Spitzer
• XMM-Newton discovery of a sharp spectral feature at ~7 keV in the Narrow-Line Seyfert 1 galaxy 1H 0707-495
• High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN
• X-ray variability in a complete sample of Soft X-ray selected AGN
• Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective
• Suzaku observations of Mrk 335: Confronting partial covering and relativistic reflection
• Relativistic disc reflection in the extreme NLS1 IRAS13224-3809
• The Variable X-ray Spectrum of Markarian 766 - II. Time-Resolved Spectroscopy
• PAH features within few hundred parsecs of active galactic nuclei
• A blurred reflection interpretation for the intermediate flux state in Mrk 335
• Are there reliable methods to estimate the nuclear orientation of Seyfert galaxies?
• The Central Engines of Narrow-Line Seyfert 1 Galaxies
• NLS1 galaxies and estimation of their central black hole masses from the X-ray excess variance method
• Modelling the Extreme X-ray Spectrum of IRAS 13224-3809
• The near-infrared spectrum of Mrk 1239: direct evidence of the dusty torus?
• Hidden starburst in Seyfert 1 Galaxies
• The nuclear environment of the NLS1 Mrk 335: obscuration of the X-ray line emission by a variable outflow
• Evidence for an emerging disc wind and collimated outflow during an X-ray flare in the narrow-line Seyfert 1 galaxy Mrk 335
• Mkn 1239: A highly polarized NLS1 with a steep X-ray spectrum and strong NeIX emission
• A Variable Partial Covering Model for the Seyfert 1 Galaxy MCG-6-30-15
• A Low-Flux State in IRAS 00521-7054 seen with NuSTAR and XMM-Newton: Relativistic Reflection and an Ultrafast Outflow
• A Fanaroff-Riley Type I Candidate in Narrow-Line Seyfert 1 Galaxy Mrk 1239
• How well can we measure supermassive black hole spin?
• Star formation in AGNs at the hundred parsec scale using MIR high resolution images
• Origin of the Broad Iron Line Feature and the Soft X-ray Variation in Seyfert Galaxies
• Multi-epoch X-ray spectral analysis of the narrow-line Seyfert 1 galaxy Mrk 478
• The Soft-X-Ray Spectral Shape of X-Ray-Weak Seyferts
• Variable blurred reflection in the narrow-line Seyfert 1 galaxy Mrk 493
• Exploring the physics of the accretion and jet in nearby narrow-line Seyfert 1 galaxies
• AGN anisotropic radiative feedback set by black hole spin
• Swift, NuStar and XMM-Newton observations of the NLS1 galaxy RX J2317.8-4422 in an extreme X-ray low flux state

Cited by in corpus (4)

• Eclipsing the X-ray emitting region in the active galaxy NGC 6814
• The Collisional and Photoionized Plasma in the Polarized NLS1 galaxy Mrk 1239
• A Highly Accreting Low-Mass Black Hole Hidden in the Dust: Suzaku and NuSTAR observations of the NLS1 Mrk 1239
• Unravelling the origin of extended radio emission in narrow-line Seyfert 1 galaxies with the JVLA