On the relativistic iron line and soft excess in the Seyfert 1 galaxy Markarian 335

Paul O'Neill, Kirpal Nandra, Massimo Cappi, Anna Lia Longinotti, Stuart Sim

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Abstract

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.
Original languageEnglish
Pages (from-to)94-98
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume381
Issue number1
DOIs
Publication statusPublished - Oct 2007

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