The “fireshell” model and the “canonical GRB” scenario. Implications for the Amati relation

Abstract

Within the “fireshell” model for GRBs we define a “canonical GRB” light curve with two sharply different components: the Proper‐GRB (P‐GRB), emitted when the optically thick fireshell reaches transparency, and the extended afterglow, emitted due to the collision between the remaining optically thin fireshell and the CircumBurst Medium (CBM). We here outline our “canonical GRB” scenario, which implies three different GRB classes: the “genuine” short GRBs, the “fake” or “disguised” short GRBs and the other (so‐called “long”) GRBs. We will also outline the corresponding implications for the Amati relation, which are opening its use for cosmology.