Fig. 4
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Example of quality thresholds: each panel shows the logarithmic histogram of some of the explored Gaia EDR3 parameters, for the Landolt (cyan) and Stetson (orange) collections. The recommended thresholds by Lindegren et al. (2021b), Fabricius et al. (2021), and Riello et al. (2021) are indicated by grey dotted vertical lines, while our final adopted ones are indicated by black solid lines.
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