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arXiv 0907.3923astro-ph.HE
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Markarian 421爆发期间的多波长同步观测

Simultaneous Multiwavelength Observations of Markarian 421 During Outburst

The VERITAS Collaboration, I. de la Calle Perez, A. Ibarra, P. Rodriguez, The MAGIC Collaboration

摘要:

我们报告的结果,两个协调的多波长活动,重点是耀变体Markarian 421在其2006年和2008年爆发。这些活动利用XMM-牛顿卫星获得紫外线和X射线数据,而伽马射线数据则利用三台成像大气切伦科夫望远镜获得,这三台望远镜是位于亚利桑那州的惠普尔10米望远镜和VERITAS望远镜,以及位于加那利群岛拉帕尔马的MAGIC望远镜。伽马射线组之间的协调努力使得在XMM-牛顿观测的大部分时间内能够真正同时获得紫外线/X射线/伽马射线波长的数据。这种同时覆盖的情况使得能够可靠地寻找观测过程中紫外线、X射线和伽马射线变异性之间的相互关系。还介绍了光谱滞后的调查和建模的光谱能量分布。

英文摘要:

We report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These campaigns obtained UV and X-ray data using the XMM-Newton satellite, while the gamma-ray data were obtained utilizing three imaging atmospheric Cerenkov telescopes, the Whipple 10m telescope and VERITAS, both based in Arizona, as well as the MAGIC telescope, based on La Palma in the Canary Islands. The coordinated effort between the gamma-ray groups allowed for truly simultaneous data in UV/X-ray/gamma-ray wavelengths during a significant portion of the XMM-Newton observations. This simultaneous coverage allowed for a reliable search for correlations between UV, X-ray and gamma-ray variability over the course of the observations. Investigations of spectral hysteresis and modeling of the spectral energy distributions are also presented.

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