| Issue |
EAS Publications Series
Volume 61, 2013
Gamma-ray Bursts: 15 Years of GRB Afterglows – Progenitors, Environments and Host Galaxies from the Nearby to the Early Universe
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|---|---|---|
| Page(s) | 217 - 221 | |
| Section | Chapter V: Afterglow Emission-I Long GRBs (Observations) | |
| DOI | https://doi.org/10.1051/eas/1361032 | |
| Published online | 22 July 2013 | |
A.J. Castro-Tirado, J.Gorosabel and I.H. Park (eds)
EAS Publications Series, 61 (2013) 217-221
Physical properties of rapidly decaying Afterglows
1 Department of Physics &
Astronomy, University of Nevada, Las
Vegas, USA
2 Pontificia Universidad Católica de
Chile, Chile
3 Thüringer Landessternwarte Tautenburg
and Max-Planck-Institut für extraterrestrische Physik,
Germany
4 Mullard Space Science Laboratory,
University College London, UK
We analyze a sample of Swift X-ray and optical GRB afterglows which were chosen so as to reduce selection effects against the weakest events. We tentatively identify important differences in GRBs that show a fast decay with respect to the average GRB, in particular a tendency for the more energetic bursts to have a steeper afterglow decline. An explanation to this finding could be bursts in a wind environment are on average more energetic than bursts occurring in a constant density medium.
© EAS, EDP Sciences 2013