The updated sample of GRB-associated SNe

Abstract:
The core collapse of massive stars is thought to give rise to both Supernovae (SNe) and Gamma-Ray Bursts (GRBs). The analysis of 
four recent SNe associated to GRBs allows us to derive physical parameters of the explosion such as the progenitor radius, the 
host-galaxy extinction, and the rejected mass of the explosion. From the complete GRB-SN sample with 28 events, two populations 
with different mass-loss histories were discovered. No correlations were evident between the GRB and the SN luminosity, which 
would suggest that the GRB and SN explosion mechanisms are independent, although they are triggered by a unique core-collapse 
event. However, a weak trend was found in a comparison between the kinetic SN energy and the total isotropic GRB energy release, 
which hints at a scenario where the energy of the core collapse is partitioned between the GRB and the SN.