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Fig. 4

Evolution of comoving rest-frame 250 μm luminosity density out to z ≃ 0.2 for sources with luminosity in the range 109 < L250/L⊙ < 5 × 109. Errors were determined using a Monte Carlo simulation which randomised redshifts and photometry and account for Poisson noise. The line is the fit (1 + z)7.1.
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