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        A first catalogue of automatically selected ultraviolet-excess sources from the UVEX survey

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        Author
        Verbeek, Kars
        de Groot, Eelco
        Groot, Paul J.
        Scaringi, Simone
        Drew, J.E.
        Greimel, Robert
        Irwin, Mike
        Gonzalez-Solares, Eduardo
        Gaensicke, Boris T.
        Casares, Jorge
        Corral-Santana, Jesus M.
        Deacon, Niall
        Steeghs, Danny
        Attention
        2299/7932
        Abstract
        We present the first catalogue of point-source ultraviolet (UV)-excess sources selected from the UV-Excess Survey of the Northern Galactic Plane (UVEX). UVEX images the Northern Galactic Plane in the U, g, r and He Iota lambda 5875 bands in the Galactic latitude range -5 degrees < b < +5 degrees. Through an automated algorithm, which works on a field-to-field basis, we select blue UV-excess sources in 211 square degrees from the (U-g) versus (g-r) colour-colour diagram and the g versus (U-g) and g versus (g-r) colour-magnitude diagrams. The UV-excess catalogue covers the magnitude range 14 < g < 22.5, contains 2170 sources and consists of a mix of white dwarfs, post-common-envelope objects, interacting binaries, quasars and active galactic nuclei. Two other samples of outliers were found during the selection: (i) a subdwarf sample, consisting of no less than 9872 candidate metal-poor stars or lightly reddened main-sequence stars, and (ii) a purple sample consisting of 803 objects, most likely a mix of reddened late M giants, T Tauri stars, planetary nebulae, symbiotic stars and carbon stars. Cross-matching the selected UV-excess catalogue with other catalogues aids with the first classification of the different populations and shows that more than 99 per cent of our selected sources are unidentified sources.
        Publication date
        2012-02
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1111/j.1365-2966.2011.20094.x
        Other links
        http://hdl.handle.net/2299/7932
        Relations
        School of Physics, Astronomy and Mathematics
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