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Fig. 1


Illustration of the method used to estimate the emission redshift and power-law continuum of quasars (the quasar shown is SDSS J012156.03+144823.9). Grey areas indicate the regions used to fit the power-law and the red line is the estimate of the continuum (power-law + C iv and C iii] emission lines). Vertical dashed lines indicate the position of emission lines.

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