[A method for redshift determination of quasars based on cross correlation].
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 linematching.
Liu
Rong
R
Department of Mathematics, Xidian University, Xi'an 710071, China.
Duan
Fu-qing
FQ
Luo
A-li
AL
D000465:Algorithms; D055587:Astronomical Objects; D055580:Astronomical Phenomena; D007091:Image Processing, Computer-Assisted; D015203:Reproducibility of Results; D013057:Spectrum Analysis / Q000379:methods*