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Fig. 3.
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Colour–colour diagrams H − Ks vs J − H and J − Ks vs J − H (upper panels) showing the colour cuts used for the analysis (in black). The lower panels reproduce the same region, but overplotted with GCs from M 31 (Wang et al. 2014), M 81 (Nantais & Huchra 2010), and NGC 5128 (Woodley et al. 2009; Taylor et al. 2015).
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