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We present the analysis of a sample of 35 candidate Compton thick (CT-)active galactic nuclei (AGNs) selected in the nearby Universe (average redshift<z>~0.03) with the Swift-BAT 100-month survey. All sources have availableNuSTAR data, thus allowing us to constrain with unprecedented quality importantspectral parameters such as the obscuring torus line-of-sight column density(N_{H, z}), the average torus column density (N_{H, tor}) and the toruscovering factor (f_c). We compare the best-fit results obtained with the widelyused MyTorus (Murphy et al. 2009) model with those of the recently publishedborus02 model (Balokovic et al. 2018) used in the same geometricalconfiguration of MyTorus (i.e., with f_c=0.5). We find a remarkable agreementbetween the two, although with increasing dispersion in N_{H, z} moving towardshigher column densities. We then use borus02 to measure f_c. High-f_c sourceshave, on average, smaller offset between N_{H, z} and N_{H, tor} than low-f_cones. Therefore, low f_c values can be linked to a "patchy torus" scenario,where the AGN is seen through an over-dense region in the torus, while high-f_cobjects are more likely to be obscured by a more uniform gas distribution.Finally, we find potential evidence of an inverse trend between f_c and the AGN2-10 keV luminosity, i.e., sources with higher f_c values have on average lowerluminosities.

Compton-thick AGN in the NuSTAR era III: A systematic study of the torus covering factor