Some notes on the Gunn-Stryker spectrophotometry and synthetic VRI colors

Details Some notes on the Gunn-Stryker spectrophotometry and synthetic VRI colors Some notes on the Gunn-Stryker spectrophotometry and synthetic VRI colors

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..830t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Sept. 1990, p. 830-833.

Astronomy and Astrophysics

Astronomy

6

Stellar Color, Stellar Spectrophotometry, Visual Photometry, Stellar Atmospheres, Stellar Magnitude

Scientific paper

Cousins VRI photometry is presented for 26 stars with continuous scans by Gunn and Stryker. This photometry is combined with literature data and a few unpublished results to critique synthetic colors from the Gunn-Stryker scans. For V - R, it is found that all pertinent results are consistent at the several-mmag level. For R - I, however, systematic differences are found which are most simply interpreted as a declination effect in the Gunn-Stryker scans. In addition, it is found that the Gunn-Stryker synthetic colors are unexpectedly noisy, with sigma per datum of about 0.02 mag. It is suggested that future users of the Gunn-Stryker data keep both these effects in mind.

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