Gamma-Ray Emission from Variable Galactic Radio Sources

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Scientific paper

We describe our ongoing program using data obtained with Swift, INTEGRAL and the Fermi Gamma-Ray Space Telescope to search for hard-X-ray and gamma-ray emission from several recently published surveys of galactic radio sources. Radio emission was established as a ubiquitous property of gamma ray sources prior to the launch of Fermi and subsequent examination of the composition of two year source catalog of that mission, comprising some 1900 individual sources, further supports this idea. Known classes of galactic variable radio sources include high-mass X-ray binaries such as Cyg X-3 and LSI +61 303 which are already established gamma-ray emitters. Those objects are often transient in nature and they are often revealed through survey observations in the hard-X-ray band. Additional objects among this class may be revealed and establishing them as gamma-ray emitters would be of great interest. Other possible source classes include radio-loud magnetars, RRATs (Rotating Radio Transients) and flare stars. Most interestingly, totally unexpected phenomena could also be revealed. We will describe our sample selection, data extraction and analysis methods and present results obtained to date.

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