The Properties of the Neckel-Chini VRI System
Abstract
Cousins (1980) data for 54 of the standard stars of Neckel and Chini (1980) and published measurements are used to investigate the properties of the Neckel-Chini VRI system. For red stars, this system diverges from the Johnson (1962) system, despite frequent claims of identity between the two. The Neckel-Chini and Cousins systems, however, are closely comparable. Both of these conclusions were previously reached in a paper by Bessell (1983); fair to good quantitative agreement with his results are obtained. Reddening ratios, the scatter in the Neckel-Chini standard-star data, and the effect of this scatter on published measurements for program stars, are discussed. Transformations from the Neckel-Chini system to the Cousins system are given.
- Publication:
-
The Astronomical Journal
- Pub Date:
- June 1989
- DOI:
- 10.1086/115120
- Bibcode:
- 1989AJ.....97.1798T
- Keywords:
-
- Astrometry;
- Infrared Photometry;
- Stellar Spectrophotometry;
- Visual Photometry;
- Interstellar Extinction;
- Stellar Color;
- Variable Stars;
- Astronomy;
- PHOTOMETRY