X-Ray Emission from a prominent dust lane lenticular galaxy NGC 5866
  We report the multiband imagery with an emphasis on the X-ray emission
properties of a prominent dust lane lenticular galaxy NGC 5866. X-ray emission
from this galaxy is due to a diffuse component and a substantial contribution
from the population of discrete X-ray binary sources. A total of 22 discrete
sources have been detected within the optical D25 extent of the galaxy, few of
which exhibit spatial association with the globular clusters hosted by this
system. Composite spectrum of the diffuse emission from this galaxy was well
constrained by a thermal plasma model plus a power law component to represent
the emission from unresolved sources, while that of the discrete sources was
well fitted by an absorbed power law component of photon index 1.82$\pm$0.14.
X-ray color-color plot for the resolved source was used to classify the
detected sources. The cumulative X-ray luminosity function of the XRBs is well
represented by a power law function of index of {\Gamma} ~ 0.82$\pm$0.12.
Optical imagery of NGC 5866 revealed a prominent dust lane along the optical
major axis of the host with dust extinction properties similar to those of the
canonical grains in the Milky Way. The dust grains responsible for the
extinction of starlight in NGC 5866 are relatively smaller in size when
compared with the canonical grains in the Milky Way and high energetic charged
particles seems to be responsible for the modulation of the dust grain size.
Spatial correspondence is evident between the dust and other phases of ISM.
