Fig. 3.
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Histogram of the number of quasars as a function of their redshift. Here, the green colour represents the quasar redshift (16 224 quasars), the orange colour represents the 2881 MgII known absorbers redshift from Anand et al. (2021) found in these quasars, and the blue as the redshift of the foreground clusters (1066 clusters).
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