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Astron. Astrophys. 340, 81-84 (1998)

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The analysis of photometric light curves and the third body in the eclipsing binary system SW Lyn

W. Ogloza 1, S. Zola 1, 2, J. Tremko 3 and J.M. Kreiner 1

1 Mt. Suhora Observatory of the Pedagogical University, ul. Podchora ych 2, PL-30-084 Cracow, Poland (sfkreine@cyf-kr.edu.pl)
2 Astronomical Observatory, Jagiellonian University, ul. Orla 171, PL-30-244 Cracow, Poland (sfzola@cyf-kr.edu.pl)
3 Skalnaté Pleso Observatory, Slovak Academy of Sciences, Tatranská Lomnica, Slovakia (tremko@auriga.ta3.sk)

Received 5 June 1998 / Accepted 21 August 1998


An analysis of photometric light curves of SW Lyn and the up-to-date O-C diagram are presented. Both photometric light curve and O-C analyses prove the existence of a third companion, orbiting the eclipsing system SW Lyn with period [FORMULA]. Modeling of the light curves has been performed using the Wilson-Devinney code. It turned out that SW Lyn is in a semidetached configuration. Temperatures of primary and secondary components are 6700K and 4500K respectively, for the system mass ratio fixed at q=0.35. The photometric solution shows a significant influence of a third light.

Key words: binaries: eclipsing – stars: individual: SW Lyn

Send offprint requests to: W. Ogloza, (ogloza@astro.as.wsp.krakow.pl)

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© European Southern Observatory (ESO) 1998

Online publication: November 3, 1998