Abstract

In the last decade Cherenkov telescopes on the ground and space-based gamma-ray instruments have identified a new sub-class of high mass X-ray binaries (HMXB) in which the emission is dominated by gamma rays. To date only six of these systems have been definitively identified. However, one TeV detected HMXB, HESS J0632+057, still has no reported GeV detection with the Fermi LAT. A deep search for gamma-ray emission of HESS J0632+057 has been performed using more than 3.5 years of Fermi LAT data. We present the results of this search in the context of the other known gamma-ray binary systems.