Matched Runs Method to Study Extended Regions of Gamma-ray Emission

B. Hona
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引用次数: 1

Abstract

Imaging atmospheric Cherenkov telescopes, such as the Very Energetic Radiation Imaging Telescope Array System (VERITAS), are uniquely suited to resolve the detailed morphology of extended regions of gamma-ray emission. However, standard VERITAS data analysis techniques have insufficient sensitivity to gamma-ray sources spanning the VERITAS field of view (3.5°), due to difficulties with background estimation. For analysis of such spatially extended sources with 0.5° to greater than 2° radius, we developed the Matched Runs Method. This method derives background estimations for observations of extended sources using matched separate observations of known point sources taken under similar observing conditions. Our technique has been validated by application to archival VERITAS data. Here we present a summary of the Matched Runs Method and multiple validation studies on different gamma-ray sources using VERITAS data.
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匹配运行法研究伽玛射线发射扩展区域
成像大气切伦科夫望远镜,如非常高能辐射成像望远镜阵列系统(VERITAS),是唯一适合解决伽马射线发射扩展区域的详细形态。然而,标准的VERITAS数据分析技术对跨越VERITAS视场(3.5°)的伽马射线源的灵敏度不足,这是由于背景估计的困难。为了分析这种半径为0.5°至大于2°的空间扩展源,我们开发了匹配运行方法。该方法利用在相似观测条件下对已知点源进行的匹配分离观测,得到扩展源观测值的背景估计。我们的技术已经通过VERITAS档案数据的应用得到了验证。在这里,我们总结了匹配运行方法,并使用VERITAS数据对不同的伽马射线源进行了多次验证研究。
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