New photoelectric observations of four W UMa systems: OO aql,V839 Oph,V566 Oph,and SW Lac |
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| Authors: | S J Lafta J F Grainger |
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| Institution: | (1) Department of Pure and Applied Physics, University of Manchester Institute of Science and Technology, Manchester, England |
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| Abstract: | The W UMa-type systems (OO Aql, V839 Oph, V566 Oph, and SW Lac) were observed photoelectrically in two wavebands (B andV) during the years 1982–1983. The light curves of these systems are analysed using Kopal's frequency-domain technique and
the optimisation method. New geometrical and physical elements have been determined. The absolute elements and the period
variations of these systems are discussed. |
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