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Fig. 7

image

Distribution of velocity differences between the visual inspection redshift (Z_VI, black histogram), Mg ii-based redshift (Z_MGII, red histogram), SDSS pipeline redshift (Bolton et al. 2012,blue histogram), C iv-based redshift (Z_CIV, green histogram), C iii]-based redshift (Z_CIII, cyan histogram) and the PCA redshift (Z_PCA). The bin size of all the histograms is Δv = 50 km s-1.

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