Comparisons of X-ray spectral properties of the seven sources. Left: comparison of the LOS column density values (as red dot) and its uncertainty values from Ricci et al. (2015) (black markers) with those of the present study (blue markers). The horizontal and vertical grey-dashed lines classify the CT column density threshold. Right: observed (i.e. non-absorption corrected) flux ratio of the reflected component over the direct transmitted component in the 2–10 keV band for each source of our sample, plotted along the LOS column density on the X-axis.