8th HEAD Meeting, 8-11 September, 2004
Session 18 Gamma-ray Bursts
Poster, Thursday, September 9, 2004, 9:00am-10:00pm

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[18.05] Diagnosis of GRB magnetization with Swift

B. Zhang (University of Nevada, Las Vegas)

Evidence of a magnetized ejecta from GRB jets is collected recently and will be reviewed. A magnetized fireball ejecta would manifest itself through some unique reverse shock signatures on the GRB early afterglow lightcurves. I will present the early afterglow lightcurve predictions for a GRB ejecta with an arbitrary magnetization parameter, and discuss the criteria of using the early afterglow information (to be retrieved by the Swift GRB mission) to diagnose the magnetization of the GRB jets. An internal shock model for a moderately magnetized fireball will also be discussed.

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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.