2007A&A...461..135S

We present a detailed analysis of the soft X-ray spectrum of the Seyfert 1 galaxy Markarian 509 taken with the XMM-Newton Reflection Grating Spectrometer. An underlying power-law continuum and three warm absorber phases provide a good fit to the data along with a number of broad and narrow emission lines. Our three warm absorber phases each have different ionization parameters and column densities. We identify a low ionization, logξ=0.89, high outflow velocity phase producing an Fe M-shell UTA feature along with absorption from OVI and NVI. There is an intermediate phase, logξ=2.14, showing absorption from H-like carbon and nitrogen and He-like neon and oxygen. The third, high ionization, logξ=3.26, low outflow velocity phase contains absorption from O VIII, NeX and highly ionized iron. All phases are blueshifted with respect to the systemic velocity with flow velocities ranging from -60km/s to -510km/s. The observed broad emission features have an rms velocity of 8000±3000km/s for the C VI and OVII lines.