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arXiv 0810.3568astro-ph
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通过使用信号定时改进单碟切伦科夫望远镜MAGIC的性能

Improving the performance of the single-dish Cherenkov telescope MAGIC through the use of signal timing

MAGIC Collaboration

摘要:

广泛空气簇射产生的切伦科夫闪光时间非常短。因此,高带宽和快速数字化读出可以最大限度地减少来自夜空光的背景的影响,并提高切伦科夫望远镜的性能。切伦科夫图像的时间结构可以进一步用于单碟切伦科夫望远镜作为一个额外的参数,以减少不必要的强子簇射的背景。将介绍一种利用时间信息的分析方法,以及随后对MAGIC望远镜性能的改进(特别是在2007年2月用超快2 GSamples/s数字化系统升级之后)。在新的MAGIC数据的分析中使用定时信息将背景减少了两倍,这反过来又导致对点状源的通量灵敏度提高了约1.4倍,正如蟹状星云观测所测试的那样。

英文摘要:

The Cherenkov light flashes produced by Extensive Air Showers are very short in time. A high bandwidth and fast digitizing readout, therefore, can minimize the influence of the background from the light of the night sky, and improve the performance in Cherenkov telescopes. The time structure of the Cherenkov image can further be used in single-dish Cherenkov telescopes as an additional parameter to reduce the background from unwanted hadronic showers. A description of an analysis method which makes use of the time information and the subsequent improvement on the performance of the MAGIC telescope (especially after the upgrade with an ultra fast 2 GSamples/s digitization system in February 2007) will be presented. The use of timing information in the analysis of the new MAGIC data reduces the background by a factor two, which in turn results in an enhancement of about a factor 1.4 of the flux sensitivity to point-like sources, as tested on observations of the Crab Nebula.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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