GRB 020813 光学和近红外观测
天体物理学
2009-11-07 v2
摘要
我们报告了GRB 020813 事件后光的光学和近红外(NIR)光度测量。我们的数据覆盖从事件发生后3小时到4天不等的时间段。在光曲线中，约14小时后出现了一个较尖锐的色差无关的突变。在喷射型火球模型的框架下，这一突变对应于喷射的半开口角为(1.9±0.2)度，这是目前推断的最小值。我们在当前可用模型的框架下讨论了结果，发现它们在解释联合的时间和光谱特性方面存在问题，特别是突变前的缓慢衰减。
引用
@article{arxiv.astro-ph/0304171,
title = {Optical and NIR Observations of the Afterglow of GRB 020813},
author = {S. Covino and D. Malesani and F. Tavecchio and L. A. Antonelli and A. Arkharov and A. Di Paola and D. Fugazza and G. Ghisellini and V. Larionov and D. Lazzati and F. Mannucci and N. Masetti and R. Barrena and S. Benetti and A. J. Castro-Tirado and S. Di Serego Alighieri and F. Fiore and F. Frontera and A. Fruchter and F. Ghinassi and M. Gladders and P. B. Hall and G. L. Israel and S. Klose and A. Magazzu' and E. Palazzi and M. Pedani and E. Pian and P. Romano and M. Stefanon and L. Stella},
journal= {arXiv preprint arXiv:astro-ph/0304171},
year = {2009}
}
备注
5 pages, 4 (color) figures; minor changes introduced; published in A&A Letters; includes aa.cls and txfonts.sty