Results obtained by fitting the radio halo shown in Fig. 3 with HALO-FDCA (Boxelaar et al. 2021). Top figures: image used for the fit with overlaid: the contours (white circles) of the best-fit circular model drawn at [1, 2, 4, 8, …] × σ (left panel), the image of the best-fit model (central panel), and the residual image of the fit, with the 2σ model contour denoted by the black circle (right panel). Contaminating sources are masked out and are highlighted by the green and red regions (left and right panels, respectively). Bottom figure: MCMC corner plot presenting the distribution of the posteriors of each fitted parameter (Foreman-Mackey et al. 2013).