Removing the Impact of Correlated PSF Uncertainties in Weak Lensing

	Removing the Impact of Correlated PSF Uncertainties in Weak Lensing
	Lu, Tianhuan; Zhang, Jun; Dong, Fuyu; Li, Yingke; Liu, Dezi; Fu, Liping; Li, Guoliang; Fan, Zuhui
刊名	ASTROPHYSICAL JOURNAL
	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
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/18065]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Lu, Tianhuan,Zhang, Jun,Dong, Fuyu,et al. Removing the Impact of Correlated PSF Uncertainties in Weak Lensing[J]. ASTROPHYSICAL JOURNAL,2018,858(2):122.
APA	Lu, Tianhuan.,Zhang, Jun.,Dong, Fuyu.,Li, Yingke.,Liu, Dezi.,...&Fan, Zuhui.(2018).Removing the Impact of Correlated PSF Uncertainties in Weak Lensing.ASTROPHYSICAL JOURNAL,858(2),122.
MLA	Lu, Tianhuan,et al."Removing the Impact of Correlated PSF Uncertainties in Weak Lensing".ASTROPHYSICAL JOURNAL 858.2(2018):122.