Left: XMM-Newton EPIC (PN, MOS1, MOS2) combined image in the total energy band [0.2–12.0] keV for the twin galaxy clusters, 3XMM J010606.7+004925 (SW) and 3XMM J010610.0+005108 (NE). This observation, ObsID = 0150870201, is obtained as a reprocessed product from the XMM-Newton Science Archive. Middle: deep SDSS image in the r-band from the Stripe 82 data corresponding to the X-ray field. The overlaid X-ray surface brightness contours (yellow) are in the total energy band [0.2–12.0] keV. Right: density map of the galaxies with photometric redshifts within z_CLG ± 0.03(1 + z_CLG) of the NE cluster redshift (see text). The contours start at 3σ and increase by 1σ. In the three images, the circles have radii equal to the cluster core radii (SW: r_c = 42.9 arcsec, NE: r_c = 36.8 arcsec) and are centred on the X-ray emission peaks. The sizes of all the images are 6 × 6 arcmin² (1.4 × 1.4 Mpc²) centred on a middle point between the two clusters.