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| Paper: |
High precision V and I photometry of globular cluster giants |
| Volume: |
8, CCDs in Astronomy |
| Page: |
326 |
| Authors: |
Da Costa, G. S. |
| Abstract: |
Photometry has been obtained in the V, I (Cousins) system for a large number of giants in six galactic globular clusters that cover a wide range of metal abundance. The data are derived from observations made with RCA CCDs on the 0.9 m telescope at CTIO over three successive seasons. Both internal checks, and external comparisons with globular cluster stars measured by conventional photoelectric photometry, suggest that the CCD photometry is accurately on the standard system, and that the individual colors and magnitudes have uncertainties of less than 0.02 mag. |
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