  Heavy quarks are an ideal probe of the quark gluon plasma created in heavy
ion collisions. They are produced in the initial hard scattering and therefore
experience the full evolution of the medium. PHENIX has previously measured the
modification of heavy quark production in Au+Au collisions at
$\sqrt{s_{NN}}=200$ GeV via electrons from semileptonic decays, which indicated
substantial modifications of the parent hadron momentum distribution. The
PHENIX barrel silicon vertex detector (VTX), installed in 2011, allows for the
separation of electrons from charm and bottom hadron decays through the use of
displaced vertex measurements. These proceedings present the results of the
completed analysis of the 2011 data set using the VTX.
