XZ Sgr
Russo1980 - Russo1980B (Johnson B)
The UBV light curves are those of Kappelmann & Walter (1979) and the radial velocity observations are from Smak (1965). The solutions are based upon the model presented by Russo & Sollazzo (1980) with minor modifications in the temperature of the secondary and limb darkenings (taken from Van Hamme’s (1993) table). This system has a very low mass ratio and apparent gas streams, and a modern spectroscopic analysis would seem in order.