CONSTRAINTS ON THE EXTRAGALACTIC BACKGROUND LIGHT FROM VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF BLAZARS
CONSTRAINTS ON THE EXTRAGALACTIC BACKGROUND LIGHT FROM VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF BLAZARS
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DOI：
10.1088/0004-637x/698/2/1761
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
J. Finke;S. Razzaque
中科院分区：
文献类型：
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作者：
J. Finke;S. Razzaque
河外背景光（EBL）从红外到紫外很难直接测量，但可以用多种方法进行抑制。EBL光子吸收来自遥远耀变体的γ射线，允许使用大气切伦科夫望远镜（ACT）的耀变体光谱通过假设耀变体源光谱来设定EBL的上限。在这里，我们应用一个简单的技术，类似于Schroedter开发的，最近的甚高能量（VHE）的γ射线观测的耀变体的EBL能量密度的上限。这种技术是独立的EBL模型，并有很好的定义误差的约束。我们的研究结果是一致的EBL测量和限制，但略有不一致的几个EBL模型。
The extragalactic background light (EBL) from the infrared to the ultraviolet is difficult to measure directly, but can be constrained with a variety of methods. The EBL photons absorb γ-rays from distant blazars, allowing one to use blazar spectra from atmospheric Cherenkov telescopes (ACTs) to put upper limits on the EBL by assuming a blazar source spectrum. Here, we apply a simple technique, similar to that developed by Schroedter, to the most recent very high energy (VHE) γ-ray observations of blazars to put upper limits on the EBL energy density. This technique is independent of the EBL model and has well defined errors on the constraints. Our results are consistent with EBL measurements and constraints but marginally inconsistent with several EBL models.