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Description
This file contains 1221 stars observed for spectral type in the field of the alpha Persei cluster. The types were published in the well known proper-motion survey by Heckmann et al. (1956AN....283..109H), and were determined by Wachmann with the equipment and methods used for the Bergedorf selected areas surveys (BSD). In general the brighter HD stars were not observed for spectral type, but most of these have been classified on the MK system by Roman & Morgan (1950ApJ...111..426R) and in later work. Nearly all the stars are included in SIMBAD with the source positions, and most also appear in WEBDA with these data as well. The positions below are nearly all from UCAC2 (for both epoch and equinox J2000), and thus differ by a few arcsec mainly from proper motion, but also from the systematic shift between the FK3 to the ICRS. In general the spectral types are not present in SIMBAD or WEBDA. I worked from Alain Fresneau's compilation for the field, which is based largely on the Heckmann data (Cat. <I/68>). I ran those coordinates into VizieR looking at UCAC2, Tycho-2, and the Fabricius Tycho double-star catalogue (Cat. <I/276>). Coordinates for two crowded stars were obtained from 2MASS. With one exception all the stars were found quite close to the predicted positions. Close pairs are indicated in the notes, as are stars with substantial proper motion (>>0.1"/year).
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