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Fig. 3


Example of a source rejected in the first step of our cleaning procedure, object ID_CANDELS=5164 (z = 3.403). Every stamp covers 6′′ × 6′′. From the top left we show the following filter cut-outs: B435, V606, I775, z850, J125, H160, CANDELS detection segmentation map, and NB387. The green circle has a radius equal to the PSF in NB387. Object ID_CANDELS=5197 (on the left, zphot_CANDELS = 2.00 ± 0.05) would be blended with ID_CANDELS=5164 and ID_CANDELS=5166 (object at the bottom right, zphot_CANDELS = 0.47 ± 0.13) in a ground-based image with PSF as large as that of NB387. In the NB387 stamp we see emission coming mainly from the lower-z source on the left-hand side of our target.

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