Abstract
AbstractA long series of photoelectric observations of the W UMa‐type eclipsing binary VW Cephei collected since 1952 is discussed. The so‐called KWEE effect is examined — regarding the heights of maxima and the depths of minima — in order to detect periodicities i n the light curve changes. The frequency analysis reveals periodicities at the small homogeneous observational domains only, but the power spectrum (in sence of DFT) of all observations is very complicated for exact interpretation. The light curve changes are entirely real much exceeding the possible errors, but they have lost their periodic character in the whole discussed time interval.
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