Two composite PDSs: EXOSAT spectra with matching HF PCA PDS. PCA data for the lower PDS are taken from observation ID 40099‐01‐03‐01 and for the upper PDS from observation ID 40099‐01‐05‐00. Data are fitted by an LF‐HF diffusion model: ﹩\chi ^{2}/ N_{\mathrm{dof}\,}=250.1/ 267=0.94﹩, ﹩\psi _{\mathrm{cor}\,}=2.32\pm 0.12﹩, ﹩t_{0,C}=1.8\pm 0.3﹩, ﹩\psi _{D}=2.5﹩ (fixed) and ﹩\chi ^{2}/ N_{\mathrm{dof}\,}=278.5/ 267=1.04﹩, ﹩\psi _{\mathrm{cor}\,}=2.07\pm 0.7﹩, ﹩t_{0,C}=1.24\pm 0.12﹩, ﹩\psi _{D}=0.3\pm 0.3﹩ (fixed) for lower and upper fits, respectively.