A statistical classification of the unassociated gamma-ray sources in
  the second Fermi Large Area Telescope Catalog
  With assistance of the identified/associated sources in the second Fermi
Large Area Telescope (LAT) catalog, we analyze and resolve the spatial
distribution and the distributions of the gamma-ray spectral and variability
indices of the remaining 575 unassociated Fermi LAT sources. Consequently, it
is suggested that the unassociated sources could statistically consist of
Galactic supernova remnants/pulsar wind nebulae, BL Lacertae objects, flat
spectrum radio quasars, and other types of active galaxies with fractions of
25%, 29%, 41%, and 5%, respectively.
