SIMBAD references

We report the results of a photometric and spectroscopic campaign on the nova-like variable MV Lyrae in a "high state" during August/September 1993. Radial-velocity observations establish an underlying binary period of 0.1329 ± 0.0004 d, with a remarkably small K-amplitude of 25 ± 4 km/s. The very low K-values for both stars in the binary attest to a very low binary inclination, in the range 10 - 13 degrees. Our photometric data seems to confirm two of the period signals reported by Barisov (1992): quasi-periodic oscillations with a period of 48 minutes, and a slow wave with a period ∼3.6 d. On the third signal reported by Borisov, "superhumps" with a period of 0.138 d, our data are less strongly supportive but still tend to favor the existence of the signal. The mass ratio of the binary is 0.43^+0.19_-0.13, somewhat higher than usually assumed in theoretical studies of superhumps.