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Precise Reduction of Solar Spectra Observed by the One-Meter New Vacuum Solar Telescope
Cai YF(蔡云芳)1,2; Xu Z(徐稚)1; Li ZG(李正刚)1; Xiang YY(向永源)1; Chen YC(陈宇超)1,2; Fu Y(付玉)1; Ji KF(季凯帆)1
Source PublicationSOLAR PHYSICS
2017-10-01
Volume292Issue:10
DOI10.1007/s11207-017-1178-0
Contribution Rank第1完成单位
Indexed BySCI
KeywordSpectrum Visible Sunspots Velocity Velocity Fields Photosphere
Abstract

We present a precise and complete procedure for processing spectral data observed by the one-meter New Vacuum Solar Telescope (NVST). The procedure is suitable for both sit-and-stare and raster-scan spectra. In this work, the geometric distortions of the spectra are first corrected for subsequent processes. Then, considering the temporal changes and the remnants of spectral lines in the flat-field, the original flat-field matrix is split into four independent components to ensure a high-precision flat-fielding correction, consisting of the continuum gradient matrix, slit non-uniform matrix, CCD dust matrix, and interference fringe matrix. Subsequently, the spectral line drifts and intensity fluctuations of the science data are further corrected. After precise reduction with this procedure, the measuring accuracies of the Doppler velocities for different spectral lines and of the oscillation curves of the chromosphere and photosphere are measured. The results show that the highest measuring accuracy of the Doppler velocity is within 100 ms(-1), which indicates that the characteristics of the photosphere and chromosphere can be studied cospatially and cotemporally with the reduced spectra of the NVST.

Funding ProjectNational Natural Science Foundation of China (NSFC)[11773072] ; National Natural Science Foundation of China (NSFC)[11573012] ; National Natural Science Foundation of China (NSFC)[11473064]
Funding OrganizationNational Natural Science Foundation of China (NSFC)[11773072, 11573012, 11473064]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳与太阳系其他学科
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherSPRINGER
Publication PlaceVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN0038-0938
URL查看原文
WOS IDWOS:000413621200010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordADAPTIVE OPTICS ; HIGH-RESOLUTION ; IMAGES ; 1-M
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11951
Collection抚仙湖太阳观测站
Corresponding AuthorJi KF(季凯帆)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, China
2.University of Chinese Academy of Sciences, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Cai YF,Xu Z,Li ZG,et al. Precise Reduction of Solar Spectra Observed by the One-Meter New Vacuum Solar Telescope[J]. SOLAR PHYSICS,2017,292(10).
APA Cai YF.,Xu Z.,Li ZG.,Xiang YY.,Chen YC.,...&Ji KF.(2017).Precise Reduction of Solar Spectra Observed by the One-Meter New Vacuum Solar Telescope.SOLAR PHYSICS,292(10).
MLA Cai YF,et al."Precise Reduction of Solar Spectra Observed by the One-Meter New Vacuum Solar Telescope".SOLAR PHYSICS 292.10(2017).
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