伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期一, 六月 11, 2007

van der Horst 2007 GRB 030329的三年射电观测


主要内容
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两篇会议文章,是arXiv:0706.1321的补充吧。

精彩摘抄:


文章信息:

arXiv:0706.1323 [ps, pdf, other] :
Title: GRB 030329: 3 years of radio afterglow monitoring
Authors: A.J. van der Horst, A. Kamble, R.A.M.J. Wijers, L. Resmi, D. Bhattacharya, E. Rol, R. Strom, C. Kouveliotou, T. Oosterloo, C.H. Ishwara-Chandra
Comments: 5 pages, 2 figures, Phil. Trans. R. Soc. A, vol.365, p.1241, proceedings of the Royal Society Scientific Discussion Meeting, London, September 2006

Radio observations of gamma-ray burst (GRB) afterglows are essential for our understanding of the physics of relativistic blast waves, as they enable us to follow the evolution of GRB explosions much longer than the afterglows in any other wave band. We have performed a three-year monitoring campaign of GRB 030329 with the Westerbork Synthesis Radio Telescopes (WSRT) and the Giant Metrewave Radio Telescope (GMRT). Our observations, combined with observations at other wavelengths, have allowed us to determine the GRB blast wave physical parameters, such as the total burst energy and the ambient medium density, as well as investigate the jet nature of the relativistic outflow. Further, by modeling the late-time radio light curve of GRB 030329, we predict that the Low-Frequency Array (LOFAR, 30-240 MHz) will be able to observe afterglows of similar GRBs, and constrain the physics of the blast wave during its non-relativistic phase.


arXiv:0706.1324 [ps, pdf, other] :
Title: GRB 030329: three years of radio afterglow monitoring
Authors: A.J. van der Horst, A. Kamble, R.A.M.J. Wijers, L. Resmi, D. Bhattacharya, E. Rol, R. Strom, C. Kouveliotou, T. Oosterloo, C.H. Ishwara-Chandra
Comments: 2 pages, to appear in Nuovo Cimento B, proceedings of the Congress "Swift and GRBs: Unveiling the Relativistic Universe", Venice, June 2006

Radio observations of gamma-ray burst (GRB) afterglows are essential for our understanding of the physics of relativistic blast waves, as they enable us to follow the evolution of GRB explosions much longer than the afterglows in any other wave band. We have performed a three-year monitoring campaign of GRB 030329 with the Westerbork Synthesis Radio Telescopes (WSRT) and the Giant Metrewave Radio Telescope (GMRT). Our observations, combined with observations at other wavelengths, have allowed us to determine the GRB blast wave physical parameters, such as the total burst energy and the ambient medium density, as well as investigate the jet nature of the relativistic outflow. Further, by modeling the late-time radio light curve of GRB 030329, we predict that the Low Frequency Array (LOFAR, 30-240 MHz) will be able to observe afterglows of similar GRBs, and constrain the physics of the blast wave during its non-relativistic phase.

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