GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts
GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts
At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with peak luminosities ($L_{\rm iso} < 10^{48.5}~\rm{erg\,s}^{-1}$) substantially lower than the average of the more distant ones ($L_{\rm iso} > 10^{49.5}~\rm{erg\,s}^{-1}$). The properties of several low-luminosity (low-$L$) GRBs indicate that they can be due to shock break-out, as …