Larsson, J. 2011 GRB 061007的热谱成分

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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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Ohno 2008 GRB 061007的随时间演化的E_p-L关系

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在Youlitouku关系上的点(红色)

把061007按时间分段(可以分出这么多段? 时间分辨率挺高的吗)后在E_p-L_iso上的图.
如果能把每个点所对应的时间也加上就更好了, 可以看到点在这个图上的演化. 不过其中有个表列了这些点, 估计包含了这些信息.
另外这个图上有一个比较明显的界线, 就是右下角是空白的. 不知道是物理上有什么限制, 还是观测上的(不像).

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Title:		Time-evolution of Peak Energy and Luminosity Relation within Pulses for GRB 061007: Probing Fireball Dynamics
Authors:		Ohno, Masanori; Ioka, Kunihito; Yamaoka, Kazutaka; Tashiro, Makoto; Fukazawa, Yasushi; Nakagawa, Yujin E.
Publication:		eprint arXiv:0812.3737
Publication Date:		12/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		21 pages, 16 figures, accepted for publication in PASJ
Bibliographic Code:		2008arXiv0812.3737O

Abstract

We perform a time-resolved spectral analysis of bright, long Gamma-ray burst GRB 061007 using Suzaku/WAM and Swift/BAT. Thanks to the large effective area of the WAM, we can investigate the time evolution of the spectral peak energy, Et_peak and the luminosity Lt_iso with 1-sec time resolution, and we find that luminosity Lt_iso with 1-sec time resolution, and we find that the time-resolved pulses also satisfy the Epeak-Liso relation, which was found for the time-averaged spectra of other bursts, suggesting the same physical conditions in each pulse. Furthermore, the initial rising phase of each pulse could be an outlier of this relation with higher Et_peak value by about factor 2. This difference could suggest that the fireball radius expands by a factor of 2-4 and/or bulk Lorentz factor of the fireball is decelerated by a factor of 4 during the initial phase, providing a new probe of the fireball dynamics in real time.

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GRB061007的长时间无拐折余辉

见astro－ph／0611089，我觉得可能是一个柱状喷流所造成的效果。像在AGN中就可以看到很长的非常窄的喷流。

主要好处是柱状喷流扫过的物质少，从而可能持续那么长的时间，要是锥状喷流，可能很快就进入非相对论阶段了。在时间指数和谱指数上也基本吻合：X射线，alpha＝1.54，beta～0.8，参考黄老师MNRAS,325,599(2001)，nu>(nu_m,nu_c)时， alpha=(p+1)/2, beta=p/2，当p＝2时，二者基本可以满足。