Exploration of SEDs of HESS J1813-126 in the AD framework. Left: Model SEDs of HESS J1813-126 for different M_A − ζ combinations. Middle and right: SEDs for the combinations M_A = 0.35 and ζ = 0°, and M_A = 0.35 and ζ = 10°, respectively. In both panels, the primary SEDs correspond to an aperture of 0.34°, while additional SEDs show progressively larger apertures. The same data points, upper limits, butterfly plots, and sensitivity curves are provided as in Fig. 4, using the same color scheme.