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arXiv 1012.0558astro-ph.HE
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用费米大视场望远镜观测高能伽马射线暴

Gamma-Ray Burst Observations at High Energy with the Fermi Large Area Telescope

Aurelien Bouvier

摘要:

费米伽马射线太空望远镜及其主要机载仪器--大面积望远镜(LAT)开启了高能天体物理学的新纪元,特别是对伽马射线暴(GRB)的研究,GRB是与宇宙大爆炸后观测到的最明亮、最遥远的事件有关的短暂的γ射线闪光。我的论文工作主要集中在费米卫星上的LAT(20 MeV - 300 GeV)和伽马射线暴监测器(10 keV - 40 MeV)对这一现象的观测。在描述用于检测和分析LAT伽玛暴的程序后,我将提供一个概述的时间和光谱特征观察到这些事件的即时发射后一年半的费米操作。伽玛射线暴也可以作为一种工具来探测有趣的物理现象。我的重点将是探测与LAT GRB相关的非常高能量的光子(通常超过10 GeV),这些光子被用来对可能违反洛伦兹不变性(假设所有观察者在真空中测量完全相同的光速,与光子能量无关)和宇宙中的光紫外河外背景光设置重要的约束。

英文摘要:

The Fermi Gamma-ray Space Telescope with its main instrument onboard, the Large Area Telescope (LAT), opened a new era in high-energy astrophysics and in particular for the study of Gamma-Ray Bursts (GRBs), which are short flashes of -rays associated with the brightest and most distant events ever observed in our universe after the Big Bang. My thesis work focused primarily on the observations of this phenomenon with the LAT (20 MeV - 300 GeV) and the Gamma-ray Burst Monitor (10 keV - 40 MeV) onboard the Fermi satellite. After describing the procedure used for detection and analysis of LAT GRBs, I will provide an overview of the temporal and spectral features observed during the prompt emission of these events after one year and a half of operation for Fermi. GRBs can also be used as a tool to probe interesting physics. My focus will be on the detection of very high energy photons (typically above 10 GeV) associated with LAT GRBs and which were used to set significant constraints both on a possible violation of Lorentz invariance - which postulates that all observers measure exactly the same speed of light in vacuum, independently of photon energy - and on the Optical-Ultraviolet extragalactic background light in the Universe.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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