Star formation rate as a function of stellar mass for the four X-ray detected (cyan circles) and the two MUSE-detected (red squares) members of the z ∼ 2.78 overdensity, as well as for the 26 candidate members of the overdensity with a photometric redshift of z_phot = [2.68 − 2.88] (yellow diamonds). Upper limits are plotted as downwards triangles. As a reference, we also plotted the z = 2.95 main sequence from Schreiber et al. (2015). Both M_* and SFR were computed through SED fitting.