RR-LYRAE STARS AND BAADE-WESSELINK METHOD .5. PHOTOMETRIC AND RADIAL-VELOCITY MEASUREMENTS OF BH-PEGASI, RX-ERIDANI, SS-LEONIS, UU-VIRGINISAND X-ARIETIS

Almost simultaneous measurements in the Geneva seven-colour photometri c system and in radial velocities with the spectrometer CORAVEL for fi ve RR Lyrae field stars were obtained in order to apply the Baade-Wess elink method to this kind of variable stars. In this paper the observa tional data on these stars are presented; the analysis of their physic al parameters will be published in the forthcoming paper of the series .