Tacusin 2008 Swift X-ray Afterglows and the Missing Jet Break Problem

主要内容:
Try to find the missing jet break.
And for the real missing ones, this may become another Swift problem.

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文章信息:

· arXiv e-print (arXiv:0801.4749)

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Title:		Swift X-ray Afterglows and the Missing Jet Break Problem
Authors:		Racusin, J. L.; Liang, E. -W.; Burrows, D. N.; Morris, D. C.; Zhang, B. B.; Zhang, B.
Publication:		eprint arXiv:0801.4749
Publication Date:		01/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		4 pages, 4 figures, contributed talk, submitted to the proceedings of Gamma Ray Bursts 2007, Santa Fe, New Mexico, November 5-9 2007
Bibliographic Code:		2008arXiv0801.4749R

Abstract

We present a systematic survey of the temporal and spectral properties of all GRB X-ray afterglows observed by Swift-XRT between January 2005 and July 2007. We have constructed a catalog of all light curves and spectra and investigate the physical origin of each afterglow segment in the framework of the forward shock models by comparing the data with the closure relations. We search for possible jet-like breaks in the lightcurves and try to explain some of the "missing" X-ray jet breaks in the lightcurves.

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