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Fig. 1


The eclipsing binaries V18, V20 and V80 in the CMD of NCG 6791. Squares are the total system light, for V20 including a third light (l3). Circles represent the calculated positions of the individual components as determined in this paper from light curve analysis and the assumption that all components are positioned on the cluster main sequence. p,s, and l3 indicate primary, secondary, and third light components, respectively.

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