The high energy emission line spectrum of NGC 1068

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 α Compton shoulder implies that the neutral reflector is Compton–thick, likely the visible inner wall of the $N_{\rm H} > 10^{25}$ 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.