Spectroscopy and Spectral Analysis, Volume. 32, Issue 8, 2260(2012)
An Automated Method to Fit Stellar Continuum Based on Statistic Windows
A novel statistic window based method to fit stellar continuum is proposed. First a stellar spectrum is divided into a series of statistic windows in which a certain percent of flux points is selected according to S/N ratio; then low order polynomial iteration fitting is carried out based on the selected flux points to obtain the stellar continuum. Experimental results show that the continuum obtained by the proposed method is more close to the real continuum, compared to other existed methods. This method has a better practical applicability and robustness to all kinds of spectra (except M-type spectrum) in SDSS. It also works well for Guoshoujing Telescope (LAMOST) pilot survey spectra.
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PAN Jing-chang, WANG Xing-xing, WEI Peng, JIANG Bin, TU Liang-ping, LUO A-li. An Automated Method to Fit Stellar Continuum Based on Statistic Windows[J]. Spectroscopy and Spectral Analysis, 2012, 32(8): 2260
Received: Feb. 18, 2012
Accepted: --
Published Online: Sep. 26, 2012
The Author Email: Jing-chang PAN (pjc@sdu.edu.cn)