Results of the spectral fits: circumstellar absorption (top left), normalization factors (top right – the norm₁ (resp. norm₂) values appear in the upper (resp. lower) part, with filled (resp. empty) circles for XMM-Newton data), observed flux (bottom left), and ratio of unabsorbed hard and soft fluxes (bottom right). The results for XMM-Newton data are shown as black circles except for the stray light-contaminated cases displayed as red triangles; magenta stars indicate Chandra data; blue crosses the Suzaku observation; and Swift data are shown as empty green squares (shown for fluxes only). The phase folding is done as in Fig. 2.