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Fig. 4
Dense core of the NGC 1718 star cluster. Shown is the extreme case of UCAC4 115-004819, which is the best match for 13 different Gaia objects. UCAC4 objects are indicated by filled red dots, while Gaia sources by green crosses. This figure was obtained using the CDS Aladin tool (Bonnarel et al. 2000; Boch & Fernique 2014).
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