Fig. 4.
X-ray contours superposed on the optical image from the ESO/MPG Wide Field Imager. Shown are the central region of A3017 (top left panel), A3016 (top right panel), the intermediate group (bottom left panel), and the northern clump (bottom right panel). We note that the centre of the X-ray emission is also marked in all first three figures by a bright early-type galaxy.
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