g − rU versus rI − i diagram for the Galactic longitude range, 60° < ℓ < 65°. As in Fig. 8 the density of sources is portrayed by the square root contoured colours, with yellow representing the lowest density of four sources per 0.02 × 0.02 mag2 bin. The peak density traced by the darkest colour is over 5000 per bin. Only sources with rI < 19 mag and errBits = 0 were used. The solid line in red is the unreddened main sequence, while the dashed line is the reddening line for an A2V star up to AV = 10.
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