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The Energetics and Environment of the Short-GRB Afterglows 050709 and 050724
A. Panaitescu
We use the available radio, optical and X-ray measurements for the afterglows of the short bursts 050709 and 050724 to constrain the blast-wave energy, its collimation and the dens…
Discovery of an Afterglow Extension of the Prompt Phase of Two Gamma Ray Bursts Observed by Swift
S. D. Barthelmy, J. K. Cannizzo, N. Gehrels +19
BAT and XRT observations of two recent well-covered GRBs observed by Swift, GRB 050315 and GRB 050319, show clearly a prompt component joining the onset of the afterglow emission.…
Jets, Structured Outflows, and Energy Injection in GRB Afterglows: Numerical Modelling
A. Panaitescu
We investigate numerically the ability of three models (jet, structured outflow, energy injection) to accommodate the optical light-curve breaks observed in 10 GRB afterglows (9805…
Analysis of the X-ray Emission of Nine Swift Afterglows
A. Panaitescu, P. Meszaros, N. Gehrels +2
The X-ray light-curves of 9 Swift XRT afterglows (050126, 050128, 050219A, 050315, 050318, 050319, 050401, 050408, 050505) display a complex behaviour: a steep t^{-3.0 \pm 0.3} dec…
Models for Achromatic Light-Curve Breaks in GRB Afterglows: Jets, Structured Outflows, and Energy Injection
A. Panaitescu
The steepening (break) of the power-law fall-off observed in the optical emission of some GRB afterglows at epoch ~1 day is often attributed to a collimated outflow (jet), undergoi…