The large landscape of supernova, GRB, and cocoon interactions

Long gamma ray bursts (LGRBs) are associated to the collapse of a massive star and formation relativistic jet. As jet propagates through star, it forms an extended, hot cocoon. The dynamical evolution jet/cocoon system its interaction with environment has been studied extensively both analytically numerically. On other hand, role played by supernova (SN) explosion LGRBs in determining outcome barely considered. In this paper, we discuss large landscape outcomes resulting from SN, We show that depends mainly on three timescales: times for cocoon shock wave break surface progenitor time needed engulf completely star. delay between launch SN moving can be related these timescales. Depending ordering scales, jet-cocoon might propagate inside ejecta or way around, properties would different. imprint complex emergent thermal non-thermal radiation.