SFR_norm vs. X-ray luminosity. Results are grouped into L_X and stellar mass bins of 0.5 dex width. As there is no evolution of the SFR_norm–L_X relation with redshift (Fig. 7), measurements are taken at all redshifts spanned by our sample (0 < z < 2.5). The SFR_norm–L_X relation appears flat at L_{X, 2 − 10 keV} < 10⁴⁴ erg s⁻¹. However, at L_{X, 2 − 10 keV} > 10⁴⁴ erg s⁻¹, SFR_norm, increases with L_X.