Effect of increasing absorption on our model from Eq. (4) with photon index Γ = 1.0 and without emission lines to focus on the evolution of the continuum shape. We assume a CF of 0.9 and a varying absorption column density N_H,1 from 3 × 10²² cm⁻² to 80 × 10²² cm⁻² covering the range obtained in Fig. 9. The shaded grey areas indicate three energy bands of interest: The A band from 0.5 to 3 keV, B band from 3 to 6 keV, and C band from 6 to 10 keV. The resulting observed spectrum (solid lines) is the sum of the spectrum not covered by the stellar wind (dash-dotted line) and the covered spectrum (dashed lines). See Fig. 3 of Diez et al. (2022) for an illustrated picture of the partial covering model.