Top: EPIC MOS 1, MOS 2, and pn stacked and redshift-corrected residuals of the (0.05 + 0.2)r₅₀₀ sample (using a gdem model). Before stacking, the MOS and pn spectra of every pointing were fitted simultaneously with coupled parameters. The vertical dotted lines indicate the position of the detected line emissions in the EPIC spectra (see lower panel). Bottom: EPIC stacked and redshift-corrected residuals of the (0.05 + 0.2)r₅₀₀ sample (using a gdem model, all instruments combined). Before stacking, the MOS and pn spectra of every pointing were fitted independently and the line emission was set to zero in the model. The height of the peak of the Fe-K complex is ~1.95.