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arXiv 2109.05038astro-ph.COastro-ph.IM
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在包括扫描策略影响的CMB调查中系统学的快速地图模拟

Fast map-based simulations of systematics in CMB surveys including effects of the scanning strategy

Nialh McCallum, Daniel B. Thomas, Michael L. Brown

摘要:

我们提出的方法来快速模拟系统影响CMB的意见,包括扫描策略的影响。使用扫描的摘要属性,我们捕获了全时有序数据(TOD)模拟的特征,允许地图和功率谱以更快的速度生成,用于许多系统-我们提出的案例在实施基于地图的方法时经历了3-4个数量级的加速。我们证明了方法的有效性,在捕捉扫描的显着特点,直接比较完整的TOD模拟-看到协议在子百分比水平的准确性。我们模拟的差分增益,指向和椭圆率的影响,以显示的方法的有效性,但注意到,可以将这些技术扩展到其他系统。最后,我们展示了如何将这些快速的基于地图的系统效应模拟应用到一个完整的焦平面上,展示了它们将数千个探测器结合在现代CMB实验中的能力。

英文摘要:

We present approaches to quickly simulate systematics affecting CMB observations, including the effects of the scanning strategy. Using summary properties of the scan we capture features of full time ordered data (TOD) simulations, allowing maps and power spectra to be generated at much improved speed for a number of systematics - the cases we present experienced speed ups of 3-4 orders of magnitude when implementing the map-based approaches. We demonstrate the effectiveness of the approaches at capturing the salient features of the scan by directly comparing to full TOD simulations - seeing agreement at sub-percent levels of accuracy. We simulate the effects of differential gain, pointing, and ellipticity to show the effectiveness of the approaches, but note that one could extend these techniques to other systematics. We finally show how to apply these fast map-based simulations of systematic effects to a full focal plane showing their ability to incorporate thousands of detectors as seen in modern CMB experiments.

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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