Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.198..281o&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 198, no. 2, p. 281-298.
Astronomy and Astrophysics
Astrophysics
Faint Objects, Hipparcos Satellite, Stellar Color, Stellar Magnitude, Stellar Spectrophotometry, Ubv Spectra, Astrometry, Stellar Luminosity
Scientific paper
This paper studies the list of 60 faint standard stars of Neckel and Chini (1980) in the UBVRI Johnson photometric system. We have re-reduced the standard stars using our own method of reduction from a large number of selected observations made at the Observatorio Astronomico Nacional and at the Centro Astronomico Hispano-Aleman, both at Calar Alto, Spain, and at the Observatorio del Roque de los Muchachos, La Palma Island, Spain. The reduction method used is explained and the results are given for the four colors used: (B-V), (U-B), (V-R), and (V-I), together with the V magnitude, that is, we have corrected many standard stars for each color and magnitude. These results are supported with graphs where residual color is plotted against corresponding color (or magnitude). Finally, our (V-R) and (V-I) results are compared to those of Taylor et al. (1989), with a good correspondence.
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