A strong test for the forward shock model in GRBs: the 90 Ms follow up of the X-ray afterglow of GRB 130427A.
Abstract
GRB 130427A was the brightest gamma-ray burst detected in 30 years. With an isotropic energy output of 8.5×10^{53} erg and redshift of 0.34, it combined a very high energy release with a relative proximity to Earth in an unprecedented fashion. Sensitive X-ray observatories such as XMM-Newton and Chandra have detected the afterglow of this event for a record-breaking baseline of 90 million seconds. The light curve shows a simple power-law decay over more than three decades in time. In this presentation, we explore the consequences of this result for the scenarios proposed to interpret GRB 130427A, the implication of this outcome in the context of the forward shock model (beaming angle, energetics, surrounding medium), and the scientific prospects of extending GRB afterglow observations for several hundreds of Ms with Athena.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf...67D