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Distribution of Gamma-ray Burst Ejecta Energy with Lorentz Factor
Jonathan Granot, Pawan Kumar
The early X-ray afterglow for a significant number of gamma-ray bursts detected by the Swift satellite is observed to have a phase of very slow flux decline with time ($F_ν\propto…
The Galaxy Hosts and Large-Scale Environments of Short-Hard Gamma-Ray Bursts
J. X. Prochaska, J. S. Bloom, H. -W. Chen +8
The rapid succession of discovery of short--duration hard--spectrum GRBs has led to unprecedented insights into the energetics of the explosion and nature of the progenitors. Yet s…
The Case for Anisotropic Afterglow Efficiency within Gamma-Ray Burst Jets
David Eichler, Jonathan Granot
Early X-ray afterglows recently detected by {\it Swift} frequently show a phase of very shallow flux decay lasting from s up to s, followed by a steeper…
Evidence for a Canonical GRB Afterglow Light Curve in the Swift/XRT Data
J. A. Nousek, C. Kouveliotou, D. Grupe +25
We present new observations of the early X-ray afterglows of the first 27 gamma-ray bursts (GRBs) detected with the Swift X-ray Telescope (XRT). The early X-ray afterglows show a c…
GRB 050509B: Constraints on short gamma-ray burst models
J. Hjorth, J. Sollerman, J. Gorosabel +19
We have obtained deep optical images with the Very Large Telescope at ESO of the first well-localized short-duration gamma-ray burst, GRB 050509B. From V and R imaging, initiated ~…
A compact binary merger model for the short, hard GRB 050509b
William H. Lee, Enrico Ramirez-Ruiz, Jonathan Granot
The first X-ray afterglow for a short (~30 ms), hard gamma-ray burst was detected by Swift on 9 May 2005 (GRB 050509b). No optical or radio counterpart was identified in follow-up…