Challenging the Forward Shock Model with the 80 Ms Follow up of the X-ray Afterglow of Gamma-Ray Burst 130427A
GALAXIES, vol.5, no.1, 2017 (ESCI, Scopus)
- Publication Type: Article / Article
- Volume: 5 Issue: 1
- Publication Date: 2017
- Doi Number: 10.3390/galaxies5010006
- Journal Name: GALAXIES
- Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus
- Keywords: Gamma-ray bursts, X-ray afterglows, GRB modeling, GRB 130427A, VIEWING ANGLE, SWIFT, ENERGETICS, STANDARD
- Istanbul University Affiliated: Yes
Abstract
GRB 130427A was the most luminous gamma-ray burst detected in the last 30 years. With an isotropic energy output of 8.5 x 10(53) erg and redshift of 0.34, it combined very high energetics with a relative proximity to Earth in an unprecedented way. Sensitive X-ray observatories such as XMM-Newton and Chandra have detected the afterglow of this event for a record-breaking baseline longer than 80 million seconds. The light curve displays a simple power-law over more than three decades in time. In this presentation, we explore the consequences of this result for a few models put forward so far to interpret GRB 130427A, and more in general the implication of this outcome in the context of the standard forward shock model.