Reflection dominated X-ray spectra of Narrow Line Seyfert 1 Galaxies: Mrk 478 and EXO 1346.2+2645

Abstract

Multi-epoch XMM-Newton spectra of the two Narrow Line Seyfert 1 (NLS1), Mrk 478 and EXO 1346.2+2645, are presented. The data were fitted with different models, including the relativistically-blurred reflection model reflionx, which was found to give a good description of both spectra in all epochs. The two sources are reflection dominated with the illuminating continuum hidden from view. This can be explained either in terms of a corrugated disc or strong gravitational light bending effects. The emission from these two sources comes from a very small region (few gravitational radii), very close to a rapidly spinning black hole. Spectral variability analysis show that both sources have constant RMS spectra, and constant hardness ratios in all epochs, in agreement with a single spectral component. The constancy the spectrum between high and low states rules out alternative models such as partial covering.

Accepted for publication in MNRAS

References in corpus (4)

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• Investigating the nature of narrow-line Seyfert 1 galaxies with high-energy spectral complexity
• Discovery of the Narrow-Line Seyfert 1 galaxy Mkn 335 in an historical low X-ray flux state
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Cited by in corpus (5)

• Disk-Wind Connection During the Heartbeats of GRS 1915+105
• Multiwavelength campaign on Mrk 509. XIII. Testing ionized-reflection models on Mrk 509
• The eROSITA Final Equatorial Depth Survey (eFEDS): Complex absorption and soft excesses in hard X-ray--selected active galactic nuclei
• A new sample of X-ray selected narrow emission-line galaxies. I. The nature of optically elusive AGN
• Correlated variability of the reflection fraction with the X-ray flux and spectral index for Mkn 478