Calibration of the Lick red CCD bandpasses

Statistics – Applications

Scientific paper

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Astronomical Photometry, Bandpass Filters, Calibrating, Charge Coupled Devices, Accuracy, Instrument Errors, Standards, Stellar Color, Stellar Magnitude

Scientific paper

Red bandpasses indigenous to the Lick Observatory CCD imaging and photometry are defined and described. A set of primary calibration standards which define the magnitude zero points is presented. Color equations, relating these bandpasses to the other, commonly used photometric systems are evaluated by numerical integration of stellar spectra, and compared to the real data. It is estimated that the present calibration is accurate and consistent to about 2-3 percent as a magnitude predictor, if the primary standards are used; this accuracy is only about 3-5 percent if VR photometry is used for calibration, and only about 5-8 percent if BV photometry is used. (These estimates do not include the errors of measurement). This is sufficient for most scientific applications of data taken in these bandpasses, although it may be improved somewhat in a future work.

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