Extended Data Fig. 3: Constraints on AGN parameters: photon index Γ vs. flux between 2−10 keV.

The contours indicate the implied 1, 2, 3σ parameter regimes from the two independent approaches utilizing Chandra spectra for the ICM component. Pink contours are based on the ratio of fluxes between sky regions 1/2 and 1/3 in the 4−6 keV band, which lacks strong emission lines, while blue contours are from the measurements of the equivalent width of Fe He-α line complex (Methods). For modeling the ICM in this work, we fixed the AGN flux at 31 × 10⁻¹² erg s⁻¹ cm⁻², shown as the black point with 1σ error bars of the photon index.