Gamma Ray Burst afterglow and prompt-afterglow relations: an overview

Understand

The mechanism responsible for the afterglow emission of Gamma Ray Bursts (GRBs) and its connection to the prompt $\gamma$-ray emission is still a debated issue.

• Relations between intrinsic properties of the prompt or afterglow emission can help to discriminate between plausible theoretical models of GRB production.
• Here we present an overview of the afterglow and prompt-afterglow two parameter relations, their physical interpretations, their use as redshift estimators and as possible cosmological tools.
• A similar task has already been correctly achieved for Supernovae (SNe) Ia by using the peak magnitude-stretch relation, known in the literature as the Phillips relation \citep{phillips93}.