Top panel: elliptical sectors (60° wide) used for the extraction of surface brightness profiles, overplotted on the XMM-Newton mosaic image (Fig. 1). The orientation angle is calculated counterclockwise from the Right Ascension axis. Middle and bottom panels: elliptical surface brightness profiles of RXCJ1825 and CIZAJ1824 extracted in the sectors, respectively. In the x-axis we plot the distances along the major axis of the ellipses. Point-like sources are removed. The black cross shows the position of the SG. The features seen in the profiles are described in Sect. 3.1.1.