Compton-Thick AGN in the NuSTAR era VI: The observed Compton-thick
  fraction in the Local Universe
  We present the analysis of simultaneous NuSTAR and XMM-Newton data of 8
Compton-thick (CT-) active galactic nuclei (AGN) candidates selected in the
Swift-Burst Alert Telescope (BAT) 100 month survey. This work is part of an
ongoing effort to find and characterize all CT-AGN in the local ($z\leq$0.05)
Universe. We used two physically motivated models, MYTorus and borus02, to
characterize the sources in the sample, finding 5 of them to be confirmed
CT-AGN. These results represent an increase of $\sim19$% over the previous
NuSTAR-confirmed, BAT-selected CT-AGN at $z\leq0.05$, bringing the total number
to 32. This corresponds to an observed fraction of $\sim 8$\% of all AGN within
this volume-limited sample, although it increases to $20\pm5$% when limiting
the sample to $z\leq0.01$. Out of a sample of 48 CT-AGN candidates, selected
using BAT and soft (0.3$-$10 keV) X-ray data, only 24 are confirmed as CT-AGN
with the addition of the NuSTAR data. This highlights the importance of NuSTAR
when classifying local obscured AGN. We also note that most of the sources in
our full sample of 48 Seyfert 2 galaxies with NuSTAR data have significantly
different line-of-sight and average torus column densities, favouring a patchy
torus scenario.
