Applications of CaH Photometry to Red Stars

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Scientific paper

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Scientific paper

A photometric system using Kron-Cousins R and I magnitudes with an intermediate-band CaH filter has been in use for a number of years. This system was designed to produce luminosity classes and photometric parallaxes for red dwarf stars with R-I > 0.7. Observations have been made on three different telescopes equipped with four different CCD cameras, two different CaH filters and three different Kron-Cousins filter sets. The system has remained consistent and provides for relatively easy transformation from one set in instrumental/standard magnitudes to another. Data collected using these various hardware systems have been transformed to a uniform system and the numerical parameters for luminosity classification are provided.

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