Radial profiles extracted from the selected FWC observations, compared with the ESAS-produced background profile (green squares): REV 2969 (red points); REV 2877 (blue crosses, MOS only); REV 2830 (blue crosses, pn only). Top panel: MOS1; middle panel: MOS2; lower panel: pn. The data represent the count rate ratios between the FWC observation and A523’s observation, calculated in the same energy band (see text).