The high energy emission line spectrum of NGC 1068

Abstract

We present and discuss the high energy (E>4 keV) XMM-Newton spectrum of the Seyfert 2 galaxy, NGC 1068. Possible evidence for flux variability in both the neutral and ionized reflectors with respect to a BeppoSAX observation taken 3.5 years before is found. Several Fe and Ni emission lines, from both neutral and highly ionized material, are detected. The intensity of the iron K$\alpha$ Compton shoulder implies that the neutral reflector is Compton--thick, likely the visible inner wall of the $N_H>10^{25}$ cm${}^{-2}$ absorber. From the equivalent width of the ionized iron lines a column density of a few $\times 10^{21}$ cm${}^{-2}$ is deduced for the hot ionized reflector. Finally, an iron (nickel) overabundance, when compared to solar values, of about 2 (4) with respect to lower Z elements, is found.

accepted for publication in A&A

References in corpus (6)

• Changing look: from Compton-thick to Compton-thin, or the re-birth of fossil AGN
• The iron Kalpha Compton Shoulder in transmitted and reflected spectra
• Testing the Seyfert Unification Theory: Chandra HETGS Observations of NGC 1068
• Iron and Nickel properties in the X-ray reflecting region of the Circinus Galaxy
• The X-ray Reflectors in the Nucleus of the Seyfert Galaxy NGC 1068
• A Chandra X-ray Study of NGC 1068: II. The Luminous X-ray Source Population

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