Spectral-Line Broadening Functions of W UMA-Type Binaries. III. W UMA

High resolution spectra of the prototype of the class of contact binary stars obtained in 1988 and 1989 have been processed using the broadening function (BF) formalism. Our previous description of this formalism is supplemented here by a prescription for BF error determination. Our mass ratio, q = 0.49 +/-0.01, confirms McLean's (1981) result, but we find slightly larger values for the component masses. However, this discrepancy is at the same level as the difference between our 1988 and 1989 results. Absolute parameters of the primary component, corrected for the energy transfer, place it within the main-sequence band on the mass-luminosity relation.