Synoptic view of the quiescent spectral properties of RX J1301.9+2747 in five epochs of XMM-Newton observation: 2000, 2019, 2020, 2022A, and 2022B (Table A.1), plotted with color tones from lighter to darker. The histograms report the posterior PDF of the parameter of interest considering five different models, 0 to 4, from the first to the fifth row. We plot in red the parameters of the diskbb component, in orange the parameters of the bbody component, in yellow the parameters of the powerlaw component, and in brown the parameters of the compTT component.