BeppoSAX observations of Narrow-Line Seyfert 1 galaxies: II. Ionized iron features in Arakelian 564

Abstract

The BeppoSAX observations of the bright Narrow-Line Seyfert 1 galaxy Ark 564 are presented along with a high quality optical spectrum taken at the 1.5m telescope at La Silla. The 0.1-10 keV X-ray spectrum is characterized by a strong soft component which is best described by blackbody-like emission with a temperature of about 160 eV. At higher energies a steep (Gamma = 2.4) power-law tail is present. There is evidence of an ionized reflector in the form of an iron line and edge. We do not find significant evidence of soft X-ray features if the spectrum is modelled with a two component continuum. The optical and X-ray spectral properties support the hypothesis of a high accretion rate onto a low mass black hole.

arXiv comment9 pages, 7 figures, accepted by Astronomy and Astrophysics

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• A Chandra HETGS observation of the Narrow-line Seyfert 1 galaxy Ark 564
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• A 12-day ASCA Observation of the Narrow-Line Seyfert 1 Galaxy Ton S180: Time-Selected Spectroscopy
• A Two-Phase Low-velocity Outflow in the Seyfert 1 Galaxy Ark~564
• Revealing a hard X-ray spectral component that reverberates within one light hour of the central supermassive black hole in Ark 564
• Spectral variability analysis of an XMM-Newton observation of Ark 564
• BeppoSAX observations of the Narrow-Line Seyfert 1 galaxy RX J1702.5+3247