Infrared and optical light curves of the dwarf nova EM Cygni

Abstract
We report simultaneous infrared and optical light curves of EM Cygni. The infrared curves are dominated by ellipsoidal variations of the late-type star in the system, which must have spectral type near K2V. The distance to the system is estimated as ∼ 320 pc and the accretion disc shown to be close to the minimum size expected from angular-momentum considerations.

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