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dc.contributor.authorAslan, Zeki
dc.contributor.authorGumerov, R.
dc.contributor.authorJin, W.
dc.contributor.authorKhamitov, I.
dc.contributor.authorMaigurova, N.
dc.contributor.authorPinigin, G.
dc.contributor.authorTang, Z.
dc.contributor.authorWang, S.
dc.date.accessioned2016-05-11T12:38:50Z
dc.date.available2016-05-11T12:38:50Z
dc.date.issued2010-02
dc.identifier.issn1432-0746
dc.identifier.urihttp://hdl.handle.net/11413/1315
dc.description.abstractWe discuss the results of an investigation of astrometric positions of extragalactic radio sources from a list for the International Celestial Reference Frame. About 300 fields around extragalactic radio sources were observed during the years 2000-2003. The observations were performed mainly using two telescopes equipped with CCD cameras at TUG, Turkey (Russian-Turkish Telescope RTT150) and at YAO (1 m telescope), (Kunming, China). The mean accuracies of the measured positions are 38 mas in right ascension and 35 mas in declination. A comparison between the measured optical positions determined using the UCAC2 catalog and the radio positions from the current ICRF shows that the overall optical-minus-radio offsets are -4 and + 15 mas for right ascension and declination, respectively. The formal internal errors of these mean offsets are 4 mas. The results of optical positions with respect to the reference catalogue 2MASS are also given. A search for a relation between optical and radio reference frames indicates that the orientation angles are near zero within their accuracy of about 5 mas. The link accuracy becomes 3 mas when our observations are combined with other studies.tr_TR
dc.language.isoen_UStr_TR
dc.publisherEdp Sciences S A, 17, Ave Du Hoggar, Pa Courtaboeuf, Bp 112, F-91944 Les Ulis Cedex A, Francetr_TR
dc.relationAstronomy & Astrophysicstr_TR
dc.subjectastrometrytr_TR
dc.subjectreference systemstr_TR
dc.subjectcatalogtr_TR
dc.subjectcelestial reference frametr_TR
dc.subjectgökölçümütr_TR
dc.subjectreferans sistemleritr_TR
dc.subjectkatalogtr_TR
dc.subjectgök referans çerçevesitr_TR
dc.titleOptical Counterpart Positions Of Extragalactic Radio Sources And Connecting Optical And Radio Reference Framestr_TR
dc.typeArticletr_TR
dc.identifier.wos274305100011
dc.identifier.wos274305100011en


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