1998PASP..110.1032M

We have found cyclic light variations with high amplitude during quiescence possibly reflecting the binary motion of the cataclysmic variable BR Lupi. With this hypothesis, an orbital frequency of 12.573 (1.91 hr)±0.071 cycles.day^–1 is derived. In addition, differential photometry obtained during the 1995 March superoutburst shows superhumps with amplitude 0.25 mag and frequency 12.171 (1.97 hr±0.106 cycles.day^–1. Hα emission line radial velocities measured during the decline of the superoutburst follow the orbital motion with half-amplitude 54±16 km.s^–1. The mass function along with several empirical and theoretical constraints enabled us to estimate the primary mass M₁=1.01 M_☉, the secondary mass M₂=0.1461 M_☉, and the inclination angle (50°<i<65°).