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Fig. 4.


Difference between the photometric redshift distribution of galaxies within 1′ of PLCK_G165.7+49.0, and the distribution obtained in the rest of the 5′ × 5′ field, both normalized to the same area (black histogram). This shows a strong excess of sources in the inner field, which is consistent with z ≃ 0.35 (dotted vertical line). We used only the most robust photometric redshifts, and show the sum of their redshift probability distribution functions obtained with BPZ (in orange).

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