The TeV Energy Spectrum of Markarian 421 Measured in a High Flaring State
The TeV Energy Spectrum of Markarian 421 Measured in a High Flaring State
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在高耀斑状态下测量的 Markarian 421 的 TeV 能谱
DOI：
10.1086/588782
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Finley
中科院分区：
文献类型：
--
作者：
A. Konopelko;W. Cui;C. Duke;J. Finley
在2004年4月的爆发期间，用惠普尔10米望远镜观测到了BL Lac天体（blazar） Mrk 421，总共观测了大约24.5小时。测量到的γ射线率在4到10分钟−1的范围内变化很大，最终超过蟹状星云（标准蜡烛）的稳定γ射线率3倍。γ射线信号的总体显著性超过70 σ，过量事件总数超过1万个。这种独特的Mrk 421爆发使得在高发射状态下测量高能量γ射线的高质量光谱成为可能。这个光谱是幂律，它延伸到10tev以上。
The BL Lac object (blazar) Mrk 421 was observed during its outburst in 2004 April with the Whipple 10 m telescope for a total of about 24.5 hr. The measured γ-ray rate varied substantially over the range from 4 to 10 minute−1 and eventually exceeded the steady γ-ray rate of the Crab Nebula (standard candle) by a factor of 3. The overall significance of the γ-ray signal exceeded 70 σ and the total number of excess events was more than 10,000. This unique Mrk 421 outburst enabled the measurement of a high-quality spectrum of very high energy γ-rays in a high state of emission. This spectrum is a power law and it extends beyond 10 TeV.