Photometry of astrometric reference stars

Details Photometry of astrometric reference stars Photometry of astrometric reference stars

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.2103c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Dec. 1991, p. 2103-2118.

Astronomy and Astrophysics

Astronomy

23

Astrometry, Astronomical Photometry, Reference Stars, Cepheid Variables, Parallax, Stellar Luminosity, Stellar Spectra, Ubv Spectra

Scientific paper

UBVRI, DDO, and uvby, H-beta photometry of astrometric reference stars is presented. Spectral types and luminosity classifications made from the colors are used to determine their spectroscopic parallaxes. In this paper, colors for 309 stars in 25 regions are given, and classifications for 210 stars have been made. These stars form reference frames in the Allegheny Observatory Multichannel Astrometric Photometer astrometric program, and in the Praesepe cluster reduced by Russell (1976). It is found that the present photometric spectral types are reliable to within 2.5 spectral subclasses.

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