Advanced stereoscopic gamma-ray shower analysis with the MAGIC telescopes
Advanced stereoscopic gamma-ray shower analysis with the MAGIC telescopes
复制标题
使用 MAGIC 望远镜进行先进的立体伽马射线簇射分析
DOI：
10.7529/icrc2011/v03/1150
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S. Klepser
中科院分区：
文献类型：
--
作者：
S. Lombardi;K. Berger;Pierre Colin;A. Ortega;S. Klepser
魔术实验于2009年升级为双筒望远镜系统。与其他成像空气切伦科夫望远镜阵列不同，MAGIC已经在单镜模式下独家运行了五年，在此期间单望远镜分析得到了优化。为了改进分析，我们使用了不同目的的随机森林事件分类方法和复杂的图像清理算法等技术。在100GeV附近和低于100GeV的能量域内优化了单镜性能，这是其他切伦科夫望远镜阵列所不能达到的。尽管如此，有了这些分析技术，我们在TeV制度下也具有竞争力。在最近发展的立体分析链中，这些单一望远镜技术的专门知识与三维重建的新可能性结合在一起，利用了单一图像的丰富性及其在天空上的投影。我们介绍了目前魔术立体数据分析中使用的图像清理和方向重建算法、天空映射和其他程序的最新进展。
The MAGIC experiment was upgraded to a two-telescope system in 2009. Unlike other Imaging Air Cherenkov Telescope arrays, MAGIC has operated for five years exclusively in monoscopic mode, and the single tele- scope analysis was optimized throughout this time. To improve the analysis, we used techniques like the random forest event classification method for different purposes, and sophisticated image cleaning algorithms. The monoscopic per- formance was optimized in the energy domain around and below 100 GeV, which is inaccessible for the other arrays of Cherenkov telescopes. Still, with these analysis techniques, we were competitive also in the TeV regime. In the recent de- velopment of the stereoscopic analysis chain, the know-how of these single telescope techniques was combined with the new possibilities of the three-dimensional reconstruction, taking advantage both of the richness of single images and their projections onto the sky. We present recent advancements in the image cleaning and direction reconstruction algorithms, sky mapping and other procedures currently used in the analysis of MAGIC stereo data.