Spectral fit for the eRASS1 (top) and eRASS2 (bottom) spectra in quiescence modeled with a diskbb. Black points are source plus background data, empty gray points show the background alone. The green line and related light green (dark green) shaded regions are the source plus background model median and 1st-99th (16th-84th) percentiles, respectively. The orange dashed lines shows the background model alone. In the lower panel, the data-model ratio is shown. The individual absorption-corrected source model component (here a diskbb) is shown with a red line, as indicated by the legend.