Velocity vs. column density plot for WA (red stars), E-UFO (green triangles), and UFO (blue squares). As in the case of Fig. 5, the warm absorber and the ultra-fast outflow are in agreement with Tombesi et al. (2013) (smaller black dots and dashed line). Arrows represent lower limits on N_H. Magenta points are soft X-ray UFOs in the literature. Again, the velocity of the warm absorber is assumed to be v ∼ 530 km s⁻¹. Even though the green triangles do not follow the linear fit of Tombesi et al. (2013), there seems to be some continuity between the column density of this absorber and the “regular” ultra-fast outflows.