Exploration of the SEDs and SBPs of HESS J1813-126 in the B2D framework. Left: Angle-integrated SEDs, calculated for increasing aperture sizes, together with the same data points, upper limits, butterfly plots, and sensitivity curves as in Fig. 4, using the same color scheme. Right: SBPs for three different energy ranges scaled to start from the same point. Vertical lines correspond to the aperture sizes and follow the same color scheme as in the left panel.