The FHD/εppsilon Epoch of Reionisation power spectrum pipeline
The FHD/εppsilon Epoch of Reionisation power spectrum pipeline
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DOI：
10.1017/pasa.2019.21
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发表时间：
2019-01
影响因子：
6.3
通讯作者：
N. Barry;A. Beardsley;R. Byrne;B. Hazelton;M. Morales;J. Pober;I. Sullivan
中科院分区：
文献类型：
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作者：
N. Barry;A. Beardsley;R. Byrne;B. Hazelton;M. Morales;J. Pober;I. Sullivan
在无线电干涉仪管道中，再电离纪元（EoR）数据分析需要前所未有的精度水平。为了满足这些要求，我们开发了一种成像功率谱分析方法，并生成了可靠的21厘米EoR测量结果。在这项工作中，我们建立了一个信号路径框架，以数学方式描述分析中的每个步骤，从快速全息反卷积（FHD）包中的数据缩减到εppsilon包中的功率谱生成。我们特别关注了FHD/εppsilon的显著特点：高度精确的光谱校准，广泛的数据验证产品，以及端到端误差传播。我们详细介绍了我们的关键数据分析产品，以促进对基于图像的功率谱分析中突出的系统学的理解。为了验证我们的分析，我们还强调了一个全管道分析仿真，以证明信号保留和缺乏信号损失。这种谨慎的处理确保了FHD/εppsilon功率谱管道可以减少无线电干涉数据，从而产生可信的21厘米EoR测量值。
Abstract Epoch of Reionisation (EoR) data analysis requires unprecedented levels of accuracy in radio interferometer pipelines. We have developed an imaging power spectrum analysis to meet these requirements and generate robust 21 cm EoR measurements. In this work, we build a signal path framework to mathematically describe each step in the analysis, from data reduction in the Fast Holographic Deconvolution (FHD) package to power spectrum generation in the εppsilon package. In particular, we focus on the distinguishing characteristics of FHD/εppsilon: highly accurate spectral calibration, extensive data verification products, and end-to-end error propagation. We present our key data analysis products in detail to facilitate understanding of the prominent systematics in image-based power spectrum analyses. As a verification to our analysis, we also highlight a full-pipeline analysis simulation to demonstrate signal preservation and lack of signal loss. This careful treatment ensures that the FHD/εppsilon power spectrum pipeline can reduce radio interferometric data to produce credible 21 cm EoR measurements.