Curran 2008 多参数拟合余辉

主要内容:
为解释Swift的早期余辉(就是一系列的新问题), 考虑多个参数: 电子指数p, 能量注入参数q, 星风参数k. 貌似解释的还不错, 但也有不能解释的.

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Title:		Testing the blast wave model with Swift GRBs
Authors:		Curran, P. A.; Starling, R. L. C.; van der Horst, A. J.; Wijers, R. A. M. J.
Publication:		eprint arXiv:0812.2813
Publication Date:		12/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		14 pages, submitted to MNRAS
Bibliographic Code:		2008arXiv0812.2813C

Abstract

The complex structure of the light curves of Swift GRBs has made the identification of breaks, and the interpretation of the blast wave caused by the burst, more difficult than in the pre-Swift era. We aim to identify breaks, which are possibly hidden, and to constrain the blast wave parameters; electron energy distribution, p, density profile of the circumburst medium, k, and the continued energy injection index, q. We do so by comparing the observed multi-wavelength light curves and X-ray spectra of our sample to the predictions of the blast wave model. We can successfully interpret all of the bursts in our sample of 10, except two, within this framework and we can estimate, with confidence, the electron energy distribution index for 6 of the sample. Furthermore we identify jet breaks in a number of the bursts. A statistical analysis of the distribution of p reveals that, even in the most conservative case of least scatter, the values are not consistent with a single, universal value. The values of k suggest that the circumburst density profiles are not drawn from only one of the constant density or wind-like media populations.

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