Energy spectrum of cluster A for its profile region 19″ − 2.0′≈(0.1 − 0.7)×R₅₀₀ with the best-fit model of all XMM-Newton detectors of the deep observation. The same format is used here as for Figure A.1; additionally a cluster model is shown in red for each detector. Here, our best-fit CXB model (Table A.1) is used as a fixed model to determine the cluster model, as described in Sect. 3.2.