UBV Light Curves of the Eclipsing Binary SW Lacertae

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

New differential photoelectric observations in UBV system of the W UMa-type eclipsing binary SW Lac are presented. The data were obtained on 4 nights from October to December in 1987 using the 61 cm reflector at Sobaeksan Astronomical Observatory. These light curves are compared with recent published light curves in order to check the light curve variations and magnitude difference of minimum light phases. Four times of minimum light are deduced and the orbital period variation of SW Lac has been discussed.

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