CCD photometry of M67 stars useful as BVRI standards

Details CCD photometry of M67 stars useful as BVRI standards CCD photometry of M67 stars useful as BVRI standards

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95.1021s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Dec. 1983, p. 1021-1024.

Astronomy and Astrophysics

Astronomy

146

Charge Coupled Devices, Reference Stars, Star Clusters, Stellar Spectrophotometry, Visual Photometry, Calibrating, Open Clusters, Optical Filters, Stellar Color, Stellar Magnitude

Scientific paper

The use of CCD detectors for BVRI photometry is discussed. For the adopted filter system and detector linear transformations to the standard system with residuals, expressed as rms deviation per star, of only 1 or 2 percent, are determined. A region is defined in open cluster M67 where stars covering a (B-V) color-index range from -0.1 to +1.3 are calibrated at B, V, R, and I wavelengths. This region is useful for calibration of the system's sensitivity. Where overlap exists with previous observers, the magnitude zero points for M67 stars agree at better than the 1 percent level.

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