Vol 15, No 7

GSC 4560–02157: a new long-period eclipsing cataclysmic variable star

Anton V. Khruslov, Anatoly V. Kusakin, Elena A. Barsukova, Vitaly P. Goranskij, Azamat F. Valeev, Nikolay N. Samus


Abstract We study the newly discovered variable star GSC 4560–02157. CCD photometry was performed in 2013–2014 at the Tien Shan Astronomical Observatory, and a spectrum was obtained with the 6-m telescope of the Special Astrophysical Observatory in June, 2014. GSC 4560–02157 is demonstrated to be an eclipsing variable star (P = 0.265359d). All its flat-bottom primary minima are approximately at the same brightness level, but the star’s out-of-eclipse brightness and brightness at secondary minima vary considerably (by up to 0.6 m ) from cycle to cycle. Moreover, there are short-term (time scale of 0.03–0.04 days) small-amplitude brightness variations out of eclipse. This behavior suggests a cataclysmic nature for the star, which is confirmed with a spectrum taken on 2014 June 5. The spectrum shows numerous emissions of the hydrogen Balmer series, HeI and HeII.


Keywords stars: dwarf novae — binaries: eclipsing — stars: individual: GSC 4560– 02157

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