AAS 206th Meeting, 29 May - 2 June 2005
Session 47 Gamma Ray Bursts
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

Previous   |   Session 47   |   Next

[47.03] The Importance of Off-Axis Beaming in Jet Models

T. Q. Donaghy, D. Q. Lamb, C. Graziani (University of Chicago)

Gamma-Ray Bursts (GRBs) are widely thought to originate from collimated jets of material moving at relativistic velocities. Emission from such a jet should be visible even when viewed from outside the angle of collimation. Using Monte Carlo population synthesis methods and including the effects of this off-axis beaming, we can compare various GRB jet models against the global properties of observed bursts. We explore whether or not the X-Ray Flashes (XRFs) seen by HETE-2 and BeppoSAX can be explained as classical GRBs viewed off-axis, and begin to address the more general question of the importance of off-axis beaming in current burst samples. This research was supported in part by NASA Contract NSAW-4690 and NASA Grant NAG5-10759.

Previous   |   Session 47   |   Next

Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.