From left to right: Planck 1deg×1deg intensity maps at 350, 550, 850, and 1380 μm (i.e., 857, 545, 353, and 217  GHz, respectively) centred on the high-z candidate PHz G95.5−61.6. Their individual ranges are as follows: ± 0.4 MJy sr^-1 (350 μm), ± 0.2 MJy sr^-1 (550 μm), ± 0.1 MJy sr^-1 (850 μm), and ± 0.05 MJy sr^-1 (1380 μm). In each panel, a circle with radius equal to the FWHM of the source (i.e. 7.2′) is centred on the Planck position, measured on the sky-region with excess emission after the detection process (see Sects. 2.2 and 2.3).