2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4035Observations and models of GRBs are reviewed with an emphasis on the early phase of the burst. Recent revision of the early afterglow model is described.14 pages, invited review talk at "Compact Stars in the QCD Phase Diagram", NORDITA and Niels Bohr Institute, Copenhagen, 15-18 August, 2001Astrophysicstext