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Table 5

Comparison of modelled number counts before and after adding the Gaussian noise.

Predicted density of Faint
500 μm-risers1 500 μm-risers2
(S500 < 30 mJy)
B17 0.45 deg−2 (51% lensed)
B17 + noise 1.73 deg−2 (24% lensed) 52%
S16 0.4 deg−2
S16 + noise 1.54 deg−2 67%

Notes. Counts are calculated by imposing our criteria to select 500 μm-risers. (1)Modelled density of 500 μm-risers before and after the addition of random Gaussian noise. Criteria used to select 500 μm-risers are: S500 > S350 > S250, S250 > 13.2 mJy and S500 > 30 mJy. Numbers reported in brackets refer to the percentage of strongly lensed galaxies; (2)Contribution of intrinsically red but faint sources (S500 < 30 mJy) to the population of modelled sources that match our 500 μm-risers selection criteria after the addition of modelled Gaussian noise.

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