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Systematic differences in position and proper-motion between the PPMX and UCAC3 catalogs
Liu, Jia-Cheng1,2; Zhu, Zi1,2; Hu, Bo3,4
2011-09-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume11Issue:9Pages:1074-1084
AbstractConsidered to be extensions of the Hipparcos reference system, PPMX and UCAC3 are two of the most important astrometric catalogs released in current years. Extensive analyses of these two large catalogs have been made in order to determine the local and overall systematic biases. The regional and magnitude dependent differences in stellar position and proper motion are comparable to random errors and are even larger in the northern hemisphere. The global orientation bias vector c between the two systems is also significant (up to 17 mas), which shows the overall differences of the PPMX and UCAC3 catalogs and their reference systems. On the other hand, the term for the global rotation vector omega is small (tenths of mas per year): it is reasonable to believe that the PPMX and UCAC3 reference frames do not rotate with respect to each other. Because of plate dependent and field-to-field errors in the UCAC3 catalog, we suggest that positions and proper motions of UCAC3 stars in the northern hemisphere (delta > -20 degrees) should be used with caution.
KeywordAstrometry Catalogs Reference Systems
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordSKY SURVEY 2MASS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000295116100006
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4563
Collection期刊(老文献)
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jia-Cheng,Zhu, Zi,Hu, Bo. Systematic differences in position and proper-motion between the PPMX and UCAC3 catalogs[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2011,11(9):1074-1084.
APA Liu, Jia-Cheng,Zhu, Zi,&Hu, Bo.(2011).Systematic differences in position and proper-motion between the PPMX and UCAC3 catalogs.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,11(9),1074-1084.
MLA Liu, Jia-Cheng,et al."Systematic differences in position and proper-motion between the PPMX and UCAC3 catalogs".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 11.9(2011):1074-1084.
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