Ultraviolet observations of β Persei, μ1 Scorpii and γ2 Velorum with the TD-1A satellite

This paper reports on the results of a study of S59 ultraviolet spectral scans of the spectroscopic binaries β Persei, μ¹ Scorpii and γ₂ Velorum. In the case of μ¹ Sco it was found that the Mgii doublet at 2800 Å undergoes intensity variations that may be indicative of variable emission in the photographic spectrum. The continuum in the 2490–2590 Å range deviates from the continuum of the ‘comparison stars’. In γ₂ Vel, flux variations in the 2770–2870 Å region have been detected.