Supernova-associating GRBs in the time-prompt, emission averaged luminosity – T₉₀/ (1 + z) plane. The red symbols denote engine-driven GRBs, while the black symbols denote the possible shock breakout GRBs suggested in some of the literature. The red dashed line gives a rough threshold above which a successful jet is possible. The A and B letters refer to the classification of Hjorth & Bloom (2011). The star symbols indicate instead the LONG-NO-SNe at z< 0.79.