Fig. 1
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CMD of the open cluster IC 4756 from Gaia DR3 photometry. The isochrones correspond to the derived parameters based on the metallicity prior from the respective Gaia XP-based stellar parameters estimates catalogue (see Section 2.2 for the description of the catalogues), namely ARC (red), ZGR (blue) and FS (yellow). The grey isochrone corresponds to the fit performed with metallicity as a free parameter.
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