A Method for Redshift Determination of Quasars Based on Cross Correlation
LIU Rong1, DUAN Fu-qing2*, LUO A-li3
1.Department of Mathematics, Xidian University, Xi'an 710071, China 2.National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences，Beijing 100080, China 3.National Observatory of Beijing, Chinese Academy of Sciences, Beijing 100012, China
Abstract：This paper presents a novel method for redshift determination of quasars.Firstly, a group of redshifts were determined using the emission line info extracted from the observed spectrum; Secondly, the template was redshifted according to the candidates, and the correlation between the observed spectrum and the redshifted template was measured.Finally, the redshift candidate corresponding to the highest correlation was chosen as the redshift.Compared with the existing methods based on spectral line matching, the proposed method has a lower dependence on the quality of spectral line extraction.Experiments show that this method is robust and superior to the methods based on spectral line matching.
刘 蓉1，段福庆2*，罗阿理3 . 一种基于交叉相关的类星体的红移测量方法[J]. 光谱学与光谱分析, 2005, 25(07): 1155-1157.
LIU Rong1, DUAN Fu-qing2*, LUO A-li3. A Method for Redshift Determination of Quasars Based on Cross Correlation. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(07): 1155-1157.
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