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

• Published in: Research in astronomy and astrophysics Vol. 15; no. 7; pp. 1005 - 1011
• Main Authors: Khruslov, Anton V., Kusakin, Anatoly V., Barsukova, Elena A., Goranskij, Vitaly P., Valeev, Azamat F., Samus, Nikolay N.
• Format: Journal Article
• Language: English
• Published: National Astronomical Observatories of Chinese Academy of Sciences and IOP Publishing 01.07.2015
• Subjects: Astronomical observatories; Astronomy; Balmer series; binaries: eclipsing; Brightness; CCD测光; GSC; Minima; Photometry; Stars; stars: dwarf novae; stars: individual: GSC 4560-02157; Variable stars; 亮度变化; 天体物理; 天文台; 时间尺度; 望远镜; 激变变星
• ISSN: 1674-4527; 2397-6209
• DOI: 10.1088/1674-4527/15/7/008

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 0.6m） 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, He Ⅰ and He Ⅱ.