Median values of SFR_norm as a function of L_X. The measurements are grouped in bins of L_X of 0.5 dex width. The errors presented are 1σ, calculated using bootstrap resampling. Top panel: results when we classified sources based on their cosmic environment, as indicated in the legend. Middle panel: results when sources are classified using their overdensity values (see text for more details). Bottom panel: similar to the top panel, but we restricted our dataset to 0.8 ≤ z ≤ 1.2.