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This article has an erratum: [https://doi.org/10.1051/0004-6361/202037819e]


Table 1.

Number of stars in each sample at each step of the selection process.

Stage nGC3 Strip
Initial sample 13 004 76 872
Distance selection 7 953 18 045
μα* selection 6 797 12 583
μδ selection 6 608 11 677

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