Postage-stamp images for the X-ray catalog sources. The images are color composites of the LBT/LBC r, z, and CFHT/WIRCam J bands. The red circles (r = 1.5″) mark the optical/NIR position of the counterpart detected in at least one of the three considered bands (r, z, J), while the white contours show the X-ray full-band contours at different significance levels: 3, 5, 10, 20, and 100σ. Each image is 20″ on a side and is centered on the X-ray centroid. The catalog XID is shown at the top of each image. For 21 X-ray sources there is no likely optical/NIR counterpart (the red circle being absent). For 17 of them, we present in Fig. A.3 their IRAC postage-stamp image showing the 4.5 μm counterpart.