The constant components in the latter two sources consist of a blackbody-like spectrum dominating below 2 keV and a neutral reflection dominating in the 2-40 keV range. The presence of partial-covering absorbers in the line of sight has been proposed as an alternative to the relativistic reflection, in order to explain part of the X-ray variability, the apparent, broad red wing of the Fe line, and the spectral curvature below 10 keV. However, using this method, I could explain the dependence of the light curve variance on energy, and rule out the presence of variable partial covering absorption which could mimic a broad red-wing of the Fe line.