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Steps towards a fully automated classification and redshift measurement pipeline for LAMOST spectra. I. Continuum level and wavelength estimation for galaxies
Luo, AL; Zhao, YH
2001-12-01
发表期刊CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
卷号1期号:6页码:563-572
摘要The Large Sky-Area Multi-Object Spectroscopic Telescope (LAMOST) under construction by the National Astronomical Observatories will yield up to four thousand multi-fiber spectra of stars and galaxies per field. The present series of papers describes the automated data-reduction pipeline currently being designed in order to cope with the anticipated flood of spectrographic data. In this preliminary paper, we present an automated method for estimating the continuum level, the positions of strong lines and the 4000 Angstrom break in galaxy spectra. In order to obtain detailed information on the continuum, we use a wavelet filter bank. After continuum fitting, our software searches for a 4000 Angstrom break and distinguishes between emission-line galaxies (ELGs) and non-ELGs according to whether the break is small or large. It then searches for strong lines and measures the intensities of emission lines and the equivalent widths of absorption lines. For non-ELGs, the absorption lines are identified automatically yielding redshift measurements.
关键词Methods : Data Analysis Techniques : Spectroscopic Galaxies : Emission Lines Galaxies : Absorption Lines
收录类别SCI
语种英语
WOS记录号WOS:000173057800011
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8595
专题光学天文研究部
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Luo, AL,Zhao, YH. Steps towards a fully automated classification and redshift measurement pipeline for LAMOST spectra. I. Continuum level and wavelength estimation for galaxies[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2001,1(6):563-572.
APA Luo, AL,&Zhao, YH.(2001).Steps towards a fully automated classification and redshift measurement pipeline for LAMOST spectra. I. Continuum level and wavelength estimation for galaxies.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,1(6),563-572.
MLA Luo, AL,et al."Steps towards a fully automated classification and redshift measurement pipeline for LAMOST spectra. I. Continuum level and wavelength estimation for galaxies".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 1.6(2001):563-572.
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