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\subsection{Dataset}  Although a number of orbital and ground-based experiments and observatories exist to study the sky in $\gamma$ rays (such as HESS, Fermi/\textit{LAT}, MAGIC \& VERITAS to name a few examples), for which this work would be relevant, the aspects of the study based on true data make use of the 5-year data set from Fermi/\textit{LAT}. This is due to the good sky and galactic plane coverage at these high energies, near-uniform exposure and the large available dataset for which extensive source catalogs [reference 1FHL and 2FGL..., etc]  and galactic diffuse background models have already been published, against which the separation methods can be tested.