Relativistic emission and absorption in the Seyfert 1 galaxy Mrk 335

Continuing controversy surrounds the interpretation of relativistic iron K linesin AGN. Broad emission is often present, but doubts remain as to whether complexabsorption can account for the spectral curvature. Mrk 335 represents a key testcase, in that it shows a broad, redshifted iron line but no evidence for ionizedabsorption. The sole remaining doubt is whether the broad line can be accountedfor by neutral partial covering. We propose an orbitlength observation todetermine this. Our second major goal is to confirm a redshifted absorption lineindicative of relativistic inflow at 0.14c. This observation will help eliminateany remaining doubt over whether future generations of Xray missions canexploit the potential of the iron lines as a probe of accretion physics and strong gravity. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]