Systematic uncertainties in the Simons Observatory: optical effects and sensitivity considerations
Systematic uncertainties in the Simons Observatory: optical effects and sensitivity considerations
复制标题
西蒙斯天文台的系统不确定性：光学效应和灵敏度考虑
DOI：
10.1117/12.2312971
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Matsuda Frederick T. et. al.
中科院分区：
文献类型：
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作者：
Gallardo Patricio A.;Matsuda Frederick T. et. al.
西蒙斯天文台（SO）是一个新的实验，旨在测量宇宙微波背景（CMB）的温度和偏振。空间观测站将使用小口径（~0.5米）和大口径（~6米）望远镜，在大范围微波频率和角度尺度上测量偏振天空，观测站将设在智利的阿塔卡马沙漠。这项工作是一系列研究SO的校准，灵敏度和系统误差的论文的一部分。在本文中，我们讨论了目前的努力，以模拟光学系统的影响，这些已被用来指导SO仪器的设计，以及如何这些研究可以用来通知仪器设计未来的实验，如CMB-S4。虽然光学系统学的研究正在进行中的小口径和大口径望远镜，我们限制本文的重点是更成熟的大口径望远镜的设计，我们的研究包括：指向误差，光学畸变，光束椭圆度，交叉极化响应，仪器偏振旋转和各种形式的旁瓣拾取。
The Simons Observatory (SO) is a new experiment that aims to measure the cosmic microwave background (CMB) in temperature and polarization. SO will measure the polarized sky over a large range of microwave frequencies and angular scales using a combination of small (~0.5 m) and large (~6 m) aperture telescopes and will be located in the Atacama Desert in Chile. This work is part of a series of papers studying calibration, sensitivity, and systematic errors for SO. In this paper, we discuss current efforts to model optical systematic effects, how these have been used to guide the design of the SO instrument, and how these studies can be used to inform instrument design of future experiments like CMB-S4. While optical systematics studies are underway for both the small aperture and large aperture telescopes, we limit the focus of this paper to the more mature large aperture telescope design for which our studies include: pointing errors, optical distortions, beam ellipticity, cross-polar response, instrumental polarization rotation and various forms of sidelobe pickup.