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Ultraviolet spectra of three ß Cep variables and a nonvariable star of similar spectral type were observed by the ultraviolet spectrometer on Mariner 9. A significant light variation at 1400 Â may have been detected for ß Cep. The variable stars have mean ultraviolet spectra similar to that of the nonvariable star and do not show any significant short-period spectral variations.doi:10.1086/129814 fatcat:hydgk2n6hbebze5cve7cqftjjq