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Fig. 6

image

Colourmagnitude diagram of sources from the central grid region (black crosses) and from the four corner regions (red triangles) with (JH)0 ≥ 0.64. The dashed horizontal line marks the position of the TRGB at K = 18.28 mag (Sect. 3.2). The dashed vertical lines mark the positions of the blue limit (left) and the boundary between the C- and M-type stars (right) (see Sect. 3.3).

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