Mass as function of the central number density n_c in units of the saturation density n_s for soft (left panel), intermediate (middle panel) and stiff (right panel) EoS. Red (blue) curves are for non-rotating (maximally rotating) configurations, vertical dashed lines indicate the matching density 1.6 n_s and the density at the deconfinement phase transition n_QM. Gray lines are sequences with constant angular momentum. Black solid (dashed) curves mark the onset of the secular (phase transition induced) instability.