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The Fermi Gamma-ray Space Telescope has been detecting a wealth of sourceswhere the multi-wavelength counterpart is either inconclusive or missingaltogether. We present a combination of factors that can be used to identifymulti-wavelength counterparts to these Fermi unassociated sources. Thisapproach was used to select and investigate seven bright, high-latitudeunassociated sources with radio, UV, X-ray and gamma-ray observations. As aresult, four of these sources are candidates to be active galactic nuclei(AGN), and one to be a pulsar, while two do not fit easily into these knowncategories of sources. The latter pair of extra-ordinary sources might reveal anew category subclass or a new type of gamma-ray emitters. These resultsaltogether demonstrate the power of a multi-wavelength approach to illuminatethe nature of unassociated Fermi sources.

Hunting for treasures among the Fermi unassociated sources: a multi-wavelength approach