论文标题
魔术立体观察的一种新颖的能量重建方法
A novel energy reconstruction method for the MAGIC stereoscopic observation
论文作者
论文摘要
我们提出了一种基于随机森林的新伽马射线能量重建方法，该方法通常用于魔术望远镜的数据分析，这是两个成像大气Cherenkov望远镜的系统。 与使用LUTS方法获得的能量分辨率相比，新能量重建的能量分辨率有所改善。对于标准观测值，即对点状源的指向Zenith（ZD）的黑暗条件，能量分辨率从$ \ sim 20 \％20 \％$在100 GEV时至$ \ sim 10 \％10 \％$，在几个TEV上。 此外，新方法抑制了能量误差分布中的异常种群，因此可以通过高斯分布更好地描述。新的能量重建方法提高了可靠性，尤其是对于具有较高能量和/或在较高ZD点的观测中的陡峭光谱源的可靠性。 我们以不同的方式验证了新方法，并通过模拟观察数据证明了在光谱分析中具有显着益处的某些情况。
We present a new gamma ray energy reconstruction method based on Random Forest to be commonly used for the data analysis of the MAGIC Telescopes, a system of two Imaging Atmospheric Cherenkov Telescopes. The energy resolution with the new energy reconstruction improves compared to the one obtained with the LUTs method. For standard observations i.e. dark conditions with pointing zenith (Zd) less than 35 deg for a point-like source, the energy resolution goes from $\sim 20\%$ at 100 GeV to $\sim 10\%$ at a few TeV. In addition, the new method suppresses the outlier population in the energy error distribution, which is thus better described by a Gaussian distribution. The new energy reconstruction method enhances the reliability especially for the sources with steep spectra, in higher energies and/or in observations at higher Zd pointings. We validate the new method in different ways and demonstrate some cases of its remarkable benefit in spectral analysis with simulated observation data.
