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We discuss the origin of a very unusual spectral structure observed in theFe-K band of the Seyfert galaxy Mrk 1513, a local ($z$=0.063) active galacticnucleus (AGN) that is efficiently accreting matter onto its centralsupermassive black hole ($L_{\rm bol}/L_{\rm Edd}\sim$0.5). We consider thehighest quality X-ray observation of this source available to date, performedin 2003 by XMM-Newton. The hard X-ray spectrum is characterised by a remarkablespectral drop at $\sim$7 keV, which can be interpreted as either the onset of abroad absorption trough or the blue wing of a relativistic emission line.Overall, this complex feature is significant at >5$\sigma$, and it isqualitatively reminiscent of a P-Cygni profile. A serendipitous spectrum oflower quality taken by XMM-Newton in 2015 qualitatively confirms the presenceof similar Fe-K structures. Although it is not possible to distinguish betweenthe two physical scenarios on sheer statistical grounds with the current data,several considerations lend weight to the possibility that Mrk 1513 is actuallyhosting a persistent outflow at accretion-disc scales, thus adding to thehandful of known AGN in which a wide-angle X-ray wind has been identified sofar.

Disc wind or disc line? The extraordinary Fe-K feature of Mrk 1513