A rare group of high mass X-ray binaries (HMXBs) are known that also exhibit MeV, GeV, and/or TeV emission ("gamma-ray binaries"). Expanding the sample of gamma-ray binaries and identifying unknown Fermi sources are currently of great interest to the community. Based upon their positional coincidence with the unidentified Fermi sources 1FGL J1127.7-6244c and 1FGL J1808.5-1954c, the Be stars HD 99771 and HD 165783 have been proposed as gamma-ray binary candidates. During Fermi Cycle 4, we have performed multiwavelength observations of these sources using XMM-Newton and the CTIO 1.5m telescope. We do not confirm high energy emission from the Be stars. Here we examine other X-ray sources in the field of view that are potential counterparts to the Fermi sources.
@article{arxiv.1303.2018,
title = {Multiwavelength Observations of Gamma-ray Binary Candidates},
author = {M. Virginia McSwain and Masha Chernyakova and Denis Malishev and Michael De Becker and Stephen Williams},
journal= {arXiv preprint arXiv:1303.2018},
year = {2013}
}