Absorption line profiles and rotational velocities for 59 stars

Absorption lines of He II, He I, Mg II, and other ions have been measured in coude spectral tracings for 59 slowly and rapidly rotating southern O, B, and A stars on the main sequence. All 668 separate line profiles have been analyzed with a procedure of differential corrections by least squares to yield the following parameters and their error estimates: half-width, central depth, equivalent width, and shape parameter. The shape parameter includes Voigt profiles as well as 'super-Gaussian' and 'super-damping' profiles. Separately measured line profiles in each star have been superimposed to yield better composite profiles with smaller errors. A preliminary value of (v sin i) is derived for each line by deconvolving it with both the intrinsic and instrumental profiles, and a mean value (including error bar) is derived for each star. The resulting mean values are only about two-thirds as large as previous results presented by Buscombe (1969).