We report a 133-ks XMM-Newton observation of the Seyfert 1 galaxy Markarian 335. The 0.4-12 keV spectrum contains an underlying power-law continuum, a soft excess below 2 keV, and a double-peaked iron emission feature in the 6-7 keV range. We investigate the possibility that the double-peaked emission might represent the characteristic signature of the accretion disc. Detailed investigations show that a moderately broad accretion disc line is most likely present, but that the peaks may be due to narrower components from more distant material. The peaks at 6.4 and 7 keV can be identified, respectively, with the molecular torus in active galactic nucleus unification schemes, and very highly ionized, optically thin gas filling the torus. The X-ray variability spectra on both long (~100 ks) and short (~1 ks) time-scales do not support the recent suggestion that the soft excess is an artefact of variable, moderately ionized absorption.
O'Neill, P., Nandra, K., Cappi, M., Longinotti, A. L., & Sim, S. (2007). On the relativistic iron line and soft excess in the Seyfert 1 galaxy Markarian 335. Monthly Notices of the Royal Astronomical Society, 381(1), 94-98. https://doi.org/10.1111/j.1745-3933.2007.00376.x