Spatial clustering and halo occupation distribution modeling of local
  AGN via cross-correlation measurements with 2MASS galaxies
  We present the clustering properties and halo occupation distribution (HOD)
modelling of very low redshift, hard X-ray-detected active galactic nuclei
(AGN) using cross-correlation function measurements with Two-Micron All Sky
Survey galaxies. Spanning a redshift range of $0.007 < z < 0.037$, with a
median $z=0.024$, we present a precise AGN clustering study of the most local
AGN in the Universe. The AGN sample is drawn from the SWIFT/BAT 70-month and
INTEGRAL/IBIS eight year all-sky X-ray surveys and contains both type I and
type II AGN. We find a large-scale bias for the full AGN sample of
$b=1.04^{+0.10}_{-0.11}$, which corresponds to a typical host dark matter halo
mass of $M_{\rm h}^{\rm typ}=12.84^{+0.22}_{-0.30}\,h^{-1} M_{\odot}$. When
split into low and high X-ray luminosity and type I and type II AGN subsamples,
we detect no statistically significant differences in the large-scale bias
parameters. However, there are differences in the small-scale clustering which
are reflected in the full HOD model results. We find that low and high X-ray
luminosity AGN, as well as type I and type II AGN, occupy dark matter haloes
differently, with 3.4$\sigma$ and 4.0$\sigma$ differences in their mean halo
masses, respectively, when split by luminosity and type. The latter finding
contradicts a simple orientation-based AGN unification model. As a by-product
of our cross-correlation approach, we also present the first HOD model of 2MASS
galaxies.
