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Fig. 1

(J − KS)0 vs. H showing the selection function for one of the fields located towards l ~ 259.6°, b ~ 54.5°. The bins are colour-scaled based on the NAPOGEE/N2MASS with sizes of 0.05 mag in (J − KS)0 colour and 0.3 mag in H. The dashed box shows the overall colour and magnitude cuts used for APOGEE.
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