Fig. 8.
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Colour distributions of of the Gaia OH/IR sample (semi-filled histograms) and of the subsample of sources with a good astrometry (filled histograms). From left to right and from top to bottom: Gaia BP–RP and G–RP, 2MASS J − Ks, and WISE W1–W4 colours. The percentages refer to the fraction of sources with respect to the total Gaia OH/IR sample of 1172 sources.
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