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IUE observations of the contact binary XY Leonis.

Vilhu, O.; Rucinski, S. M.

IUE observations (FES light curves, LWR Mg II emission data, and an SWP spectrum) obtained on June 11, 1982 are reported for XY Leo. The Mg II fluxes were measured at two primary minima, one secondary minimum, and one orbital quadrature. The data are presented in tables and spectra and analyzed. The orbital-average relative flux f(Mg II)/f(bol) is…