Notes. red χ² (or Stat): reduced χ² or total Statistic. χ²(or Stat)/d.o.f.: χ² (or total Statistic) over degrees of freedom. kT: apec model temperature, in units of keV. Γ: Powerlaw photon index. N_H, av: Average torus column density, in units of 10²⁴ cm⁻². A_S90: Constant associated to the reflection component, edge-on. A_S0: Constant associated to the reflection component, face-on. C_F: Covering factor of the torus. cos (θ_i): cosine of the inclination angle. cos (θ_i) = 1 represents a face-on scenario. F_s: Fraction of scattered continuum. Norm: Normalization of the AGN emission. N_{H, inst.,num.}: Line-of-sight hydrogen column density for a given observation, in units of 10²⁴ cm⁻². C_inst.,num.: Cross-normalization constant for a given observation, with respect to the intrinsic flux of the first Chandra observation. L_{Ch1, min − max}: Intrinsic luminosity of the first Chandra observation in the (min-max) keV range, in erg s⁻¹. For the other observations, the luminosity can be obtained multiplying by the cross-normalization constant. The last block shows the reduced χ² (or Stat) of the best-fit when considering a) No variability between different observations; b) No intrinsic flux (i.e. C) variability; c) No N_H, los variability. (−u) refers to a parameter being compatible with the hard limit of the available range.