An Automated Method to Fit Stellar Continuum Based on Statistic Windows
PAN Jing-chang1, WANG Xing-xing1, WEI Peng2, JIANG Bin1,2, TU Liang-ping2,3, LUO A-li1,2
1. School of Mechanical, Electrical & Information Engineering, Shandong University at Weihai, Weihai 264209, China 2. Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 3. School of Science，Liaoning University of Science and Technology, Anshan 144051, China
Abstract：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.
潘景昌1, 汪惺惺1, 韦 鹏2, 姜 斌1,2, 屠良平2,3, 罗阿理1,2 . 基于统计窗的恒星连续谱自动拟合方法[J]. 光谱学与光谱分析, 2012, 32(08): 2260-2263.
PAN Jing-chang1, WANG Xing-xing1, WEI Peng2, JIANG Bin1,2, TU Liang-ping2,3, LUO A-li1,2 . An Automated Method to Fit Stellar Continuum Based on Statistic Windows. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(08): 2260-2263.
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