TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation
TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation
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来自耀变体 H 1426 428 的 TeV 伽马射线和漫射河外背景辐射
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
E. al.
中科院分区：
文献类型：
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作者：
H. C. Aharonian;E. al.
报道了用赫格拉成象大气切伦科夫望远镜系统在积分通量水平(4 2stat 1syst)10 12erg cm2 S 1上探测到来自blazar H142 6+42 8的TeV射线。H1426+428位于z=0.129的红移位置，这使它成为迄今在TeV射线中探测到的最远的源。预计TeV辐射将被双星河外背景辐射(DEBRA)强烈吸收。观测到的TeV光子能谱与经Debra吸收修正后的本征功率谱/E_1：9符合得很好。然而，统计误差以及关于本征源光谱的不确定性，不允许关于Debra红外光子ELD密度的强有力的声明。
The detection of TeV -rays from the blazar H 1426+428 at an integral flux level of (4 2stat 1syst) 10 12 erg cm 2 s 1 above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H 1426+428 is located at a redshift of z = 0.129, which makes it the most distant source detected in TeV -rays so far. The TeV radiation is expected to be strongly absorbed by the diuse extragalactic background radiation (DEBRA). The observed energy spectrum of TeV photons is in good agreement with an intrinsic power law spectrum of the source/ E 1:9 corrected for DEBRA absorption. Statistical errors as well as uncertainties about the intrinsic source spectrum, however, do not permit strong statements about the density of the DEBRA infrared photon eld.