Posterior distribution of the free model parameters of each of the CXB components, namely the local hot bubble (LHB), the Galactic halo (GaH), and the extragalactic emission (ExG), and the [HEB,IBKG] normalization of each XMM-Newton detector after modeling the X-ray energy spectrum of the CXB region (see Figure A.1 and Sect. 3.2). For the 2D histograms, contours show the 1σ, 2σ, and 3σ levels. For the 1D histograms, dashed lines show the median and 1σ levels. Temperature parameters (T) are shown in units of keV and normalization parameters (e.g., K) are shown in decadic logarithm and units of log₁₀(deg⁻²). The corresponding values of the XSB for the CXB components are shown in Figure A.4.