SED model of the LHAASO spectrum along with the X-ray ULs for Region 1 (solid UL) and Region 2 (dashed UL) using an ECPL distribution for the relativistic electrons generating the emission with fixed spectral index p. The contribution to the ICS from the X-ray tail is shown as the dash-dotted line. Values of the magnetic field between 0.5 μG and 1.6 μG are tested. Left panel : plot for p = 1.2. Right panel : plot for p = 2.4. In both panels, the upper limits were computed by rescaling the results to the area of the LHAASO region, assuming a radius of 0.147° as LHAASO Collaboration (2025).