Mass reconstruction results for A1795. Top left: electron density profile reconstructed with the multi-scale method used here (Eckert et al. 2020) compared to the L1 regularization results presented in Ghirardini et al. (2019) and publicly released by the X-COP team. Top right: nonparametric reconstruction of the 3D temperature profile (green) compared to the spectroscopic X-ray measurements (red) and the 3D temperature profile obtained by dividing the SZ pressure by the X-ray density (orange). See Sect. 3.4 for details. The blue curve shows the projected, spectroscopically weighted, and PSF convolved temperature profile, to be compared to the red data points. Middle left: electron pressure profile measured by Planck and XMM-Newton compared to the reconstructions obtained from the NFW and Einasto mass models (Sect. 3.2), the parametric forward approach (labeled “Forward”; see Sect. 3.3), and the NP reconstruction (Sect. 3.4). The dotted vertical lines show the location of R₅₀₀ and R₂₀₀ from the NFW fit. Middle right: output mass profiles obtained from the four individual reconstructions (NFW, Einasto, Forward, and NP). The data points show the NP results evaluated at the radius of the X-ray spectroscopic measurements (labeled “NP Spectral bins,” blue) and the SZ pressure data (“NP SZ bins,” red). Bottom left: same as previous but for the gas mass fraction. The gray shaded area shows the cosmic baryon fraction Ω_b/Ω_m in Planck Collaboration XIII (2016) cosmology. Bottom right: posterior distributions and correlations for the parameters of the NFW profile.