LAMOST SPECTROGRAPH RESPONSE CURVES: STABILITY AND APPLICATION TO FLUX CALIBRATION
文献类型：期刊论文
| 作者 | Du, Bing1,2 ; Luo, A-Li1,2; Kong, Xiao1; Zhang, Jian-Nan1; Guo, Yan-Xin1; Cook, Neil James3; Hou, Wen1; Yang, Hai-Feng1; Li, Yin-Bi1; Song, Yi-Han1
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| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
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| 出版日期 | 2016-12-01 |
| 卷号 | 227期号:2 |
| 关键词 | methods: data analysis methods: statistical techniques: spectroscopic |
| 英文摘要 | The task of flux calibration for Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) spectra is difficult due to many factors, such as the lack of standard stars, flat-fielding for large field of view, and variation of reddening between different stars, especially at low Galactic latitudes. Poor selection, bad spectral quality, or extinction uncertainty of standard stars not only might induce errors to the calculated spectral response curve (SRC) but also might lead to failures in producing final 1D spectra. In this paper, we inspected spectra with Galactic latitude |b| >= 60 degrees and reliable stellar parameters, determined through the LAMOST Stellar Parameter Pipeline (LASP), to study the stability of the spectrograph. To guarantee that the selected stars had been observed by each fiber, we selected 37,931 high-quality exposures of 29,000 stars from LAMOST DR2, and more than seven exposures for each fiber. We calculated the SRCs for each fiber for each exposure and calculated the statistics of SRCs for spectrographs with both the fiber variations and time variations. The result shows that the average response curve of each spectrograph (henceforth ASPSRC) is relatively stable, with statistical errors <= 10%. From the comparison between each ASPSRC and the SRCs for the same spectrograph obtained by the 2D pipeline, we find that the ASPSRCs are good enough to use for the calibration. The ASPSRCs have been applied to spectra that were abandoned by the LAMOST 2D pipeline due to the lack of standard stars, increasing the number of LAMOST spectra by 52,181 in DR2. Comparing those same targets with the Sloan Digital Sky Survey (SDSS), the relative flux differences between SDSS spectra and LAMOST spectra with the ASPSRC method are less than 10%, which underlines that the ASPSRC method is feasible for LAMOST flux calibration. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; SOUTHERN SPECTROPHOTOMETRIC STANDARDS ; GUOSHOUJING TELESCOPE LAMOST ; INTERSTELLAR EXTINCTION ; SPECTROSCOPIC SURVEY ; DATA RELEASE ; STARS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000391441600002 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6814]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Hertfordshire, Ctr Astrophys Res, Sch Physcis Astron & Math, Coll Lane, Hatfield AL10 9AB, Herts, England |
| 推荐引用方式 GB/T 7714 | Du, Bing,Luo, A-Li,Kong, Xiao,et al. LAMOST SPECTROGRAPH RESPONSE CURVES: STABILITY AND APPLICATION TO FLUX CALIBRATION[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2016,227(2). |
| APA | Du, Bing.,Luo, A-Li.,Kong, Xiao.,Zhang, Jian-Nan.,Guo, Yan-Xin.,...&Wu,Yue.(2016).LAMOST SPECTROGRAPH RESPONSE CURVES: STABILITY AND APPLICATION TO FLUX CALIBRATION.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,227(2). |
| MLA | Du, Bing,et al."LAMOST SPECTROGRAPH RESPONSE CURVES: STABILITY AND APPLICATION TO FLUX CALIBRATION".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 227.2(2016). |
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来源：国家天文台
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