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        RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence

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        Author
        Ramsay, G.
        Hakala, P.
        Barclay, T.
        Wheatley, P.J.
        Marshall, G.
        Lehto, H.
        Napiwotzki, R.
        Nelemans, G.
        Potter, S.
        Todd, I.
        Attention
        2299/4201
        Abstract
        We report the discovery of an accreting binary, RAT J1953+1859, made during the RApid Temporal Survey (RATS) on the Isaac Newton Telescope. It showed high amplitude (0.3 mag) quasi-periodic oscillations on a time-scale of ∼20 min. Further observations made using the Nordic Optical Telescope showed it to be ∼4 mag brighter than in the discovery images. These photometric observations, together with radial velocity data taken using the William Herschel Telescope, point to an orbital period of ∼90 min. These data suggest that RAT J1953+1859 is a dwarf novae of the SU UMa type. What makes RAT J1953+1859 unusual is that it is the first such system to be discovered as a result of high amplitude QPOs during quiescence. This suggests that high-cadence wide-field surveys could be another means to discover cataclysmic variables as a result of their short period variability.
        Publication date
        2009
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1111/j.1365-2966.2009.14982.x
        Other links
        http://hdl.handle.net/2299/4201
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