Distributions of λ_sBHAR for obscured and unobscured AGN. The top panel presents the distributions using an N_H threshold of 10²³ cm⁻² for the source classification. The bottom panel presents the results using N_H = 10²² cm⁻² to characterise sources. In both cases, the errors of the N_H measurements have been taken into account (see text for more details). Distributions are also weighted based on the redshift and L_X of the sources.