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Observations and Light Curve Solutions of the Eclipsing Binaries USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731
Kjurkchieva, D.; Popov, V. A.; Vasileva, D.; Petrov, N.
AA(Department of Physics, Shumen University, 115 Universitetska, 9700 Shumen, Bulgaria) AB(IRIDA Observatory, 17A Prof. Asen Zlatarov str., Sofia, Bulgaria) AC(Department of Physics, Shumen University, 115 Universitetska, 9700 Shumen, Bulgaria) AD(National Astronomical Observatory Rozhen, Institute of Astronomy, Bulgarian Academy of Sciences, 72 Tsarigradsko Shosse Blvd, BG-1784 Sofia, Bulgaria)
Serbian Astronomical Journal, vol. 193, pp. 27-32 (SerAJ Homepage)
Publication Date:
binaries: close, binaries: eclipsing, methods: data analysis, stars: fundamental parameters, stars: individual: USNO-B1.0 1395-0370184, USNO-B1.0 1395-0370731
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Astronomical Observatory and Department of Astronomy, Belgrade
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We present follow-up photometric observations in Sloan filters g', i' of the newly discovered eclipsing stars USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731. Our data revealed that their orbital periods are considerably bigger than the previous values. This result changed the classification of USNO-B1.0 1395-0370184 from ultrashort-period binary (P=0.197 d) to short-period system (P=0.251 d). The light curve solutions of our observations revealed that USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731 are overcontact binaries in which components are K dwarfs, close in masses and radii. The light curve distortions were reproduced by cool spots with angular radius of around 20°.

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