Beam characterization for the QUIET Q-Band instrument using polarized and unpolarized astronomical sources
Beam characterization for the QUIET Q-Band instrument using polarized and unpolarized astronomical sources
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使用偏振和非偏振天文源对 QUIET Q 波段仪器进行光束表征
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
R. Monsalve
中科院分区：
文献类型：
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作者：
R. Monsalve
在分析和解释宇宙微波背景辐射（CMB）实验数据时，束流特性是至关重要的。在本文中，我们提出的扫描策略，数据分析方法和结果的44 GHz（Q波段）的Q/U成像实验（QUIET）第一阶段，使用蟹状星云（Tau A）和木星的偏振和非偏振点源，分别光束特性。光束被建模为高斯项乘以正交多项式对称化后，使用在不同的旋转角度的光轴上采取的观察。l-空间窗函数计算过程被解释和应用，沿着参数不确定性的相应传播。这些窗口函数编码的有限分辨率的仪器上的能力，以测量角功率谱的影响，作为多极的函数。此外，仪器偏振的特点是在二维穆勒场描述耦合的斯托克斯参数。这项工作中提供的数据是在2008年10月开始的第一个安静观测季节收集的。
Beam characterization is of critical importance when analyzing and interpreting data from Cosmic Microwave Background (CMB) experiments. In this paper we present scanning strategies, data analysis methods and results of the 44 GHz (Q-Band) beam characterization for the Q/U Imaging ExperimenT (QUIET) Phase- I, using the Crab nebula (Tau A) and Jupiter as polarized and unpolarized point sources, respectively. The beams are modeled as a sum of gaussian terms multiplied by orthogonal polynomials after symmetrization using observations taken at different rotation angles about the optical axis. The l-space window function calculation procedure is explained and applied, along with the corresponding propagation of parameter uncertainty. These window functions encode the effect of the finite resolution of the instrument on its ability to measure the angular power spectrum, as a function of multipole . Additionally, the instrumental polarization is characterized in terms of two-dimensional Mueller fields which describe the coupling of the Stokes parameters. The data presented in this work were collected during the first season of QUIET observations that started in October 2008.
可靠的 shapelet 图像分析
影响因子：
6.5
作者：
Melchior;Meneghetti;Bartelmann
通讯作者：
Bartelmann