Optical and near-IR images of the fields of 2XMMp J144854.8+085400 (top row), 2XMMp J145220.8+165458 (middle), and 2XMMp J151716.8+001302 (bottom). The first column shows SDSS cutouts of the respective fields, the central column the W1-band (3.4 μm) images from the AllWISE survey, and on the right side, we present LBC images (mean of the r- and z-SLOAN filters). Images of each row are centred at the respective X-ray positions and show the same region of the sky. Blue dashed lines (middle and right images) indicate contours from the X-ray flux, where the levels are chosen for illustration alone. North is up, east is left, and the images are centred on the respective X-ray position.