XMM-Newton 0.5–1.4 keV surface brightness profiles (top: inner temperature structure, bottom: across the radio relic). Red and black crosses represent the radial profile of an opening angle with 150°–400° and 80°–130°, respectively. In the top plot, the vertical dashed line indicates the location of the discontinuity. In the bottom plot, the dotted gray lines show WSRT 360 MHz radio emission.