Evidence for an anticorrelation between the duration of the shallow decay phase of GRB X-ray afterglows and redshift

G. Stratta, D. Guetta, V. D'Elia +3

One of the most intriguing features discovered by Swift is a plateau phase in the X-ray flux decay of about 70% of the afterglows of gamma-ray bursts (GRBs). The physical origin of…