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题名: Removing the Impact of Correlated PSF Uncertainties in Weak Lensing
作者: Lu, Tianhuan; Zhang, Jun; Dong, Fuyu; Li, Yingke; Liu, Dezi; Fu, Liping; Li, Guoliang; Fan, Zuhui
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2018
卷号: 858, 期号:2, 页码:122
英文摘要: Accurate reconstruction of the spatial distributions of the point-spread function (PSF) is crucial for high precision cosmic shear measurements. Nevertheless, current methods are not good at recovering the PSF fluctuations of high spatial frequencies. In general, the residual PSF fluctuations are spatially correlated, and therefore can significantly contaminate the correlation functions of the weak lensing signals. We propose a method to correct for this contamination statistically, without any assumptions on the PSF and galaxy morphologies or their spatial distribution. We demonstrate our idea with the data from the W2 field of CFHTLenS.
语种: 英语
WOS记录号: WOS:000433065500009
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/18065
Appears in Collections:星系宇宙学和暗能量研究团组_期刊论文

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