2008年6月Markarian 421从光学到TeV能量的耀斑
The June 2008 flare of Markarian 421 from optical to TeV energies
摘要：
我们提出的光学甚高能量（VHE）的伽马射线观测Mrk 421 2008年5月24日和6月23日之间。AGILE-GRID在6月9日至15日期间探测到高能（HE）伽马射线信号，比EGRET在Mrk 421中观测到的平均通量亮约1倍。1.5.在20-60 keV的X射线，一个大振幅的5天耀斑（6月9日至15日）被解决的最大通量约。55米螃蟹。SuperAGILE，RXTE/ASM和Swift/BAT数据显示软X射线和硬X射线之间存在明显相关的耀斑结构，硬X射线具有高通量/振幅变化。在同时记录的GASP-WEBT光学数据中也检测到相同的燃烧行为的提示。6月12日至13日，雨燕在耀斑最大值附近进行了一次机会观测，发现了有史以来观测到的最高2-10 keV通量（>100 mCrab）和峰值同步加速器能量约为100 kJ。3 keV，与0.5-1 keV的典型值有很大的偏移。在6月6日至8日期间，在VHE（E>200 GeV）伽马射线的观测表明，源通量在明亮状态下达到峰值，与X射线的同时峰值有很好的相关性。伽马射线耀斑可以在同步加速器自康普顿模型的框架内解释为轻子在喷流中的快速加速。
英文摘要：
We present optical to very-high energy (VHE) gamma-ray observations of Mrk 421 between 2008 May 24 and June 23. A high-energy (HE) gamma-ray signal was detected by AGILE-GRID during June 9-15, brighter than the average flux observed by EGRET in Mrk 421 by a factor of approx. 1.5. In 20-60 keV X-rays, a large-amplitude 5-day flare (June 9-15) was resolved with a maximum flux of approx. 55 mCrab. SuperAGILE, RXTE/ASM and Swift/BAT data show a clearly correlated flaring structure between soft and hard X-rays, with a high flux/amplitude variability in hard X-rays. Hints of the same flaring behavior is also detected in the simultaneously recorded GASP-WEBT optical data. A target of opportunity observation by Swift near the flare maximum on June 12-13 revealed the highest 2-10 keV flux ever observed (>100 mCrab) and a peak synchrotron energy of approx. 3 keV, a large shift from typical values of 0.5-1 keV. Observations at VHE (E>200 GeV) gamma-rays during June 6-8 show the source flux peaking in a bright state, well correlated with the simultaneous peak in the X-rays. The gamma-ray flare can be interpreted within the framework of the Synchrotron Self Compton model in terms of a rapid acceleration of leptons in the jet.
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