Probability distributions of the accretion disk reddening parameter E(B − V), and the column density N_H. The E(B − V) parameter was inferred assuming the SMC attenuation law by Prevot et al. (1984) on the accretion disk emission, while the N_H is a quantity that parametrizes the (X-ray-normalised) infrared torus templates by Silva et al. (2004). These distributions are constructed as the superposition of 100 random draws from each source. A gaussian kernel-density estimator (KDE) with a bandwidth of 0.1 is used to display these distributions.