Preliminary Catalog Early-Type Emission Stars

It is a compilation and rearrangement of the following lists:

• the Catalogue and Bibliography of Stars of Classes B and A whose spectra have bright H lines by P. Merrill and C. Burwell,
• the lists of Haro and his associates at Tonantzintla,
• the catalogues of Luminous Stars in the Northern Milky Way, Vols. I to VI published by the astronomers of the Hamburger Sternwarte and the Warner and Swasey Observatoryy (III/76)
• shorter lists of emission stars published by Parenago, Bidelman and McCarthy and Treanor have also been included. The present catalogue has a simple aim: to assist the astronomer in finding from a vast array of articles in the literature whether the star under investigation has been known to show emission features in the earlier major surveys of emission stars of early type carried out at the Mount Wilson, Tonantzila, Hamburg and Warner-Swasey Observatories. The catalogue includes the star identification, Durchmusterung identification, source catalog, RA and Dec, Galactic latitude and longitude, apparent magnitude, spectral classification and remarks.