Catching GRBs with atmospheric Cherenkov telescopes
Catching GRBs with atmospheric Cherenkov telescopes
复制标题
用大气切伦科夫望远镜捕捉伽玛暴
DOI：
10.1063/1.3621774
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Otte
中科院分区：
文献类型：
--
作者：
R. Gilmore;J. Primack;A. Bouvier;A. Otte
费米已经证明伽玛暴是一个大于10 GeV光子的源。我们提出了一个估计的伽玛暴的探测率与下一代切伦科夫望远镜。我们的预测是基于费米探测到的伽玛暴的观测特性，结合在较低能量下工作的仪器对暴群的光谱特性和红移测定。虽然到目前为止，GRB的VHE发射的探测已经避开了地面仪器，但我们的研究结果表明，地面探测可能在拟议的切伦科夫望远镜阵列（CTA）的范围内，尽管速率很低，为0.25 - 0.5/年。这样的探测将有助于限制伽玛射线暴的发射机制。来自遥远伽马射线暴的这些能量的光子受到紫外光背景光的影响，地面探测也可以提供一个有价值的探测河外背景光（EBL）的高红移。
Fermi has shown GRBs to be a source of >10 GeV photons. We present an estimate of the detection rate of GRBs with a next generation Cherenkov telescope. Our predictions are based on the observed properties of GRBs detected by Fermi, combined with the spectral properties and redshift determinations for the bursts population by instruments operating at lower energies. While detection of VHE emission from GRBs has eluded ground-based instruments thus far, our results suggest that ground-based detection may be within reach of the proposed Cherenkov Telescope Array (CTA), albeit with a low rate, 0.25 - 0.5/yr. Such a detection would help constrain the emission mechanism of gamma-ray emission from GRBs. Photons at these energies from distant GRBs are affected by the UV-optical background light, and a ground-based detection could also provide a valuable probe of the Extragalactic Background Light (EBL) in place at high redshift.