An Eigenvector-Based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder

doi:10.3847/1538-3881/aaf4c0

CORC > 国家天文台 > 中国科学院国家天文台

	An Eigenvector-Based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder
	Zu, Shifan 1,2; Pen, Ue-Li 3,4; Wu, Fengquan 1; Li, Jixia 1,2; Stebbins, Albert 5; Wang, Yougang 1; Chen, Xuelei 1,2,6
刊名	ASTRONOMICAL JOURNAL
	2019
卷号	157 期号:1 页码:14
关键词	instrumentation: interferometers methods: data analysis techniques: interferometric
ISSN号	0004-6256
DOI	10.3847/1538-3881/aaf4c0
英文摘要	We propose an eigenvector-based formalism for the calibration of radio interferometer arrays. In the presence of a strong dominant point source, the complex gains of the array can be obtained by taking the first eigenvector of the visibility matrix. We use the stable principle component analysis method to help separate outliers and noise from the calibrator signal to improve the performance of the method. This method can be applied with poorly known beam model of the antenna, is insensitive to outliers or imperfections in the data, and has low computational complexity. It thus is particularly suitable for the initial calibration of the array, which can serve as the initial point for more accurate calibrations. We demonstrate this method by applying it to the cylinder pathfinder of the Tianlai experiment, which aims to measure the dark energy equation of state using the baryon acoustic oscillation features in the large-scale structure by making intensity mapping observation of the redshifted 21 cm emission of the neutral hydrogen (H I). The complex gain of the array elements and the beam profile in the east-west direction (short axis of the cylinder) are successfully obtained by applying this method to the transit data of bright radio sources.
资助项目	NSFC[11473044] ; NSFC[11633004] ; NSFC[U1501501] ; Astronomical Technology Center of NAOC ; MoST grant[2016YFE0100300] ; Tianlai cylinder array ; NSFC-ISF joint research program[11761141012] ; CAS Frontier Science Key Project[QYZDJ-SSW-SLH017] ; Fermi Research Alliance, LLC (FRA)[DE-AC02-07CH11359]
WOS关键词	SELF-CALIBRATION ; POLARIMETRY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000455051500002
资助机构	NSFC ; NSFC ; Astronomical Technology Center of NAOC ; Astronomical Technology Center of NAOC ; MoST grant ; MoST grant ; Tianlai cylinder array ; Tianlai cylinder array ; NSFC-ISF joint research program ; NSFC-ISF joint research program ; CAS Frontier Science Key Project ; CAS Frontier Science Key Project ; Fermi Research Alliance, LLC (FRA) ; Fermi Research Alliance, LLC (FRA) ; NSFC ; NSFC ; Astronomical Technology Center of NAOC ; Astronomical Technology Center of NAOC ; MoST grant ; MoST grant ; Tianlai cylinder array ; Tianlai cylinder array ; NSFC-ISF joint research program ; NSFC-ISF joint research program ; CAS Frontier Science Key Project ; CAS Frontier Science Key Project ; Fermi Research Alliance, LLC (FRA) ; Fermi Research Alliance, LLC (FRA) ; NSFC ; NSFC ; Astronomical Technology Center of NAOC ; Astronomical Technology Center of NAOC ; MoST grant ; MoST grant ; Tianlai cylinder array ; Tianlai cylinder array ; NSFC-ISF joint research program ; NSFC-ISF joint research program ; CAS Frontier Science Key Project ; CAS Frontier Science Key Project ; Fermi Research Alliance, LLC (FRA) ; Fermi Research Alliance, LLC (FRA) ; NSFC ; NSFC ; Astronomical Technology Center of NAOC ; Astronomical Technology Center of NAOC ; MoST grant ; MoST grant ; Tianlai cylinder array ; Tianlai cylinder array ; NSFC-ISF joint research program ; NSFC-ISF joint research program ; CAS Frontier Science Key Project ; CAS Frontier Science Key Project ; Fermi Research Alliance, LLC (FRA) ; Fermi Research Alliance, LLC (FRA)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24270]
专题	中国科学院国家天文台
通讯作者	Chen, Xuelei
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Canadian Inst Theoret Astrophys, 60 St George St, Toronto, ON M5S 3H8, Canada 4.Canadian Inst Adv Res, CIFAR Program Gravitat & Cosmol, Toronto, ON MSG 1Z8, Canada 5.Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA 6.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zu, Shifan,Pen, Ue-Li,Wu, Fengquan,et al. An Eigenvector-Based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder[J]. ASTRONOMICAL JOURNAL,2019,157(1):14.
APA	Zu, Shifan.,Pen, Ue-Li.,Wu, Fengquan.,Li, Jixia.,Stebbins, Albert.,...&Chen, Xuelei.(2019).An Eigenvector-Based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder.ASTRONOMICAL JOURNAL,157(1),14.
MLA	Zu, Shifan,et al."An Eigenvector-Based Method of Radio Array Calibration and Its Application to the Tianlai Cylinder Pathfinder".ASTRONOMICAL JOURNAL 157.1(2019):14.