Larsson, J. 2011 GRB 061007的热谱成分

主要内容:
这个暴用热谱拟合和用Band谱拟合一样好。

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Title:		Spectral components in the bright, long GRB 061007: properties of the photosphere and the nature of the outflow
Authors:		Larsson, J.; Ryde, F.; Lundman, C.; McGlynn, S.; Larsson, S.;
Affiliation:		AA(Department of Astronomy, Stockholm University,
Publication:		Monthly Notices of the Royal Astronomical Society, Volume 414, Issue 3, pp. 2642-2649. (MNRAS Homepage)
Publication Date:		07/2011
Origin:		WILEY
Astronomy Keywords:		radiation mechanisms: general, gamma-ray burst: individual: GRB 061007
Abstract Copyright:		© 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS
DOI:		10.1111/j.1365-2966.2011.18582.x
Bibliographic Code:		2011MNRAS.414.2642L

Abstract

We present a time-resolved spectral analysis of the bright, long GRB 061007 (z= 1.261) using Swift and Suzaku data. We find that the prompt emission of the burst can be equally well explained by a photospheric component together with a power law as by a Band function, and we explore the implications of the former model. The photospheric component, which we model with a multicolour blackbody, dominates the spectra and has a very stable shape throughout the burst. This component provides a natural explanation for the hardness-intensity correlation seen within the burst and also allows us to estimate the bulk Lorentz factor and the radius of the photosphere. The power-law component dominates the fit at high energies and has a nearly constant slope of -1.5. We discuss the possibility that this component is of the same origin as the high-energy power laws recently observed in some Fermi bursts.

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