Fig. 8
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Left: color-color diagram of all spectroscopically confirmed QSOs with VISTA/VIRCAM photometry. For the notation of the regions, see Fig. 1. Right: Y–J and J–KS colors as a function of redshift for all spectroscopically confirmed QSOs with VISTA/VIRCAM photometry. The variations are driven by strong emission lines that enter and exit the band passes of individual filters.
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