CCD stellar sequences in galactic structure fields

Stobie, R. S. ; Sagar, R. ; Gilmore, G. (1985) CCD stellar sequences in galactic structure fields Astronomy & Astrophysics Supplement Series, 60 . pp. 503-515. ISSN 0365-0138

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Using a CCD camera, deep BVI photometric sequences in the magnitude range V = 12-22 are obtained in order to calibrate stellar magnitudes in selected galactic structure fields. Consideration is given to the photographic determination of the magnitude zero points and to the color equations of the CCD which are derived on the basis of 16 E-region standards. It is shown that the systematic errors in tying in the zero points of the whole CCD sequence are less than 0.03 magnitude in B, V, and I, and that the stellar magnitudes are not of the same high accuracy as photoelectric standards. The CCD sequences are presented in tables, and charts for the identification of the objects are given.

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