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Comparison of pulsar positions from timing and very long baseline astrometry
Wang, J. B.1,2,3; Coles, W. A.4; Hobbs, G.3; Shannon, R. M.3,5; Manchester, R. N.3; Kerr, M.3,6; Yuan, J. P.1,2; Wang, N.1,2; Bailes, M.7; Bhat, N. D. R.5; Dai, S.3; Dempsey, J.8; Keith, M. J.9; Lasky, P. D.10; Levin, Y.10; Oslowski, S.7; Ravi, V.11; Reardon, D. J.3,10; Rosado, P. A.7; Russell, C. J.12; Spiewak, R.7; van Straten, W.7; Toomey, L.3; Wen, L.13; You, X. -P.14; Zhu, X. -J.13
2017-07-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume469Issue:1Pages:425-434
Contribution Rank1
Abstract

Pulsar positions can be measured with high precision using both pulsar timing methods and very long baseline interferometry (VLBI). Pulsar timing positions are referenced to a solar-system ephemeris, whereas VLBI positions are referenced to distant quasars. Here, we compare pulsar positions from published VLBI measurements with those obtained from pulsar timing data from the Nanshan and Parkes radio telescopes in order to relate the two reference frames. We find that the timing positions differ significantly from the VLBI positions (and also differ between different ephemerides). A statistically significant change in the obliquity of the ecliptic of 2.16 +/- 0.33 mas is found for the JPL ephemeris DE405, but no significant rotation is found in subsequent JPL ephemerides. The accuracy with which we can relate the two frames is limited by the current uncertainties in the VLBI reference source positions and in matching the pulsars to their reference source. Not only do the timing positions depend on the ephemeris used in computing them, but also different segments of the timing data lead to varying position estimates. These variations are mostly common to all ephemerides, but slight changes are seen at the 10 mu as level between ephemerides.

Correspondent Emailwangjingbo@xao.ac.cn
KeywordMethods: Data Analysis Techniques: Interferometric Astrometry Reference Systems Pulsars: General
SubtypeArticle
DOI10.1093/mnras/stx837
WOS HeadingsScience & Technology ; Physical Sciences
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCelestial Reference Frame ; Vlbi Astrometry ; Gravitational-waves ; Array ; Parallaxes ; Distance ; System ; Interferometry ; Dispersion ; Radiation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000402825000029
Funding OrganizationCommonwealth of Australia ; West Light Foundation of Chinese Academy of Sciences(XBBS201322) ; National Natural Science Foundation of China(11403086, U1431107, 11373006) ; Chinese Academy of Sciences(XDB23010200) ; Australian Research Council (ARC)
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/1640
Collection射电天文研究室_脉冲星研究团组
射电天文研究室
其它
Corresponding AuthorWang, J. B.
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
3.CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia
4.Univ Calif San Diego, Elect & Comp Engn, La Jolla, CA 92093 USA
5.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia
6.Naval Res Lab, 4555 Overlook Ave,SW, Washington, DC 20375 USA
7.Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia
8.CSIRO Informat Management & Technol, Box 225, Dickson, ACT 2602, Australia
9.Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
10.Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800, Australia
11.CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA
12.CSIRO Sci Comp Serv, Australian Technol Pk,Locked Bag 9013, Alexandria, NSW 1435, Australia
13.Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia
14.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, J. B.,Coles, W. A.,Hobbs, G.,et al. Comparison of pulsar positions from timing and very long baseline astrometry[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,469(1):425-434.
APA Wang, J. B..,Coles, W. A..,Hobbs, G..,Shannon, R. M..,Manchester, R. N..,...&Zhu, X. -J..(2017).Comparison of pulsar positions from timing and very long baseline astrometry.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,469(1),425-434.
MLA Wang, J. B.,et al."Comparison of pulsar positions from timing and very long baseline astrometry".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 469.1(2017):425-434.
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