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BV Dra

Kaluzny1986 - Kaluzny1986B (Johnson B)

The U, B & V light curves are from Yamasaki et al. (1979). The radial velocity curves are from Batten & Lu (1986). The solutions are from Kaluzny & Rucinski (1986). They only reported solving the V light curve of Yamasaki (1979), but I have included U and B models based on their V solution with the wavelength-dependent parameters adjusted appropriately. This is the only known visual binary which consists of two overcontact binaries, BV and BW Dra.