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Fig. 4.

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Absolute magnitude at rest-frame 1450 Å, M1450, versus redshift for the LOFAR radio-detected quasars (red) and LOFAR radio-undetected quasars (blue) samples. The dashed line denotes the magnitude limit iPS = 23.0. This limit is calculated assuming a quasar continuum described by a power-law with slope α = −0.5, and with no emission line contribution or Lyα forest blanketing.

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