Abstract
Spectrophotometry of U Geminorum from lambda3200 to lambda10 900 shows an upturn in flux for wavelengths longward of lambda6000. The energy distribution can be interpreted as the sum of fluxes from an M4.5 or M5 star and a source giving a flat continuum. The presence of an M star is confirmed by a higher-resolution spectrum in the red and near infrared and by the work of Stauffer, Spinrad, and Thorstensen. The M companion is less dense than a main-sequence star of the same color index. The absolute photometry allows a distance modulus of 4.4 +- 0.4 mag to be derived for U Geminorum. The absolute visual magnitude of the quiescent system at orbital phase 0.08 is M/sub V/=10.3 +- 0.8.
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