The Galactic Contribution to IceCube's Astrophysical Neutrino Flux

High energy neutrinos have been detected by IceCube, but their origin remains a mystery. Determining the sources of this flux is a crucial first step towards multi-messenger studies. In this work we systematically compare two classes of sources with the data: Galactic and extragalactic. We assume that the neutrino sources are distributed according to a class of Galactic models. We build a likelihood function on an event by event basis including energy, event topology, absorption, and direction information. We present the probability that each high energy event with deposited energy $E_{\mathrm{d}\mathrm{e}\mathrm{p}}>60$ TeV in the HESE sample is Galactic, extragalactic, or background. For Galactic models considered the Galactic fraction of the astrophysical flux has a best fit value of $1.3\mathrm{\%}$ and is $<9.5\mathrm{\%}$ at 90% CL. A zero Galactic flux is allowed at $<1\sigma$.