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Galaxy Spectrum Subtraction of a Mixed Spectrum Based on Two Class PCA Eigen-Spectra
Tu Liang-ping1,2; Wu Fu-chao1; Luo A-li3; Zhao Yong-heng3
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
2010-06-01
Volume30Issue:6Pages:1707-1711
SubtypeArticle
AbstractThe authors present a new method called two class PCA for decomposing the mixed spectra, namely, for subtracting the host galaxy contamination from each SN spectrum. The authors improved the quality of reconstructed galaxy spectrum and computational efficiency, and these improvements were realized because we used both the PCA eigen spectra of galaxy templates library and SN templates library to model the mixed spectrum. The method includes mainly three steps described as follows. The first step is calculating two class PCA eigen spectra of galaxy templates and SN templates respectively. The second step is determining all reconstructed coefficients by the SVD matrix decomposition or orthogonal transformation. And the third step is computing a reconstructed galaxy spectrum and subtracting it from each mixed spectrum. Experiments show that this method can obtain an accurate decomposition of a mixed synthetic spectrum, and is a method with low time-consumption to get the reliable SN spectrum without galaxy contamination and can be used for spectral analysis of large amount of spectra. The time consumption using our method is much lower than that using chi(2)-template fitting for a spectrum.
KeywordGalaxy Spectrum Subtraction Principal Component Analysis Orthogonal Transformation
WOS HeadingsScience & Technology ; Technology
WOS KeywordDIGITAL SKY SURVEY ; II SUPERNOVA SURVEY ; DATA RELEASE ; SPECTROSCOPY
Indexed BySCI
Language英语
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000278580200057
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/2957
Collection模式识别国家重点实验室_机器人视觉
Affiliation1.Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China
2.Liaoning Univ Sci & Technol, Sch Sci, Anshan 144051, Peoples R China
3.Chinese Acad Sci, Natl Observ China, Beijing 100012, Peoples R China
First Author AffilicationInstitute of Automation, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Tu Liang-ping,Wu Fu-chao,Luo A-li,et al. Galaxy Spectrum Subtraction of a Mixed Spectrum Based on Two Class PCA Eigen-Spectra[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2010,30(6):1707-1711.
APA Tu Liang-ping,Wu Fu-chao,Luo A-li,&Zhao Yong-heng.(2010).Galaxy Spectrum Subtraction of a Mixed Spectrum Based on Two Class PCA Eigen-Spectra.SPECTROSCOPY AND SPECTRAL ANALYSIS,30(6),1707-1711.
MLA Tu Liang-ping,et al."Galaxy Spectrum Subtraction of a Mixed Spectrum Based on Two Class PCA Eigen-Spectra".SPECTROSCOPY AND SPECTRAL ANALYSIS 30.6(2010):1707-1711.
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