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19 April 2024 |
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Space-VLBI phase-reference mapping and astrometry | | J.C. Guirado
; E. Ros
; D.L. Jones
; J.F. Lestrade
; J.M. Marcaide
; M.A. Perez-Torres
; R.A. Preston
; | | Date: |
23 Apr 2001 | | Subject: | astro-ph | | Affiliation: | U. Valencia), E. Ros (MPIfR), D.L. Jones (JPL), J.F. Lestrade (Paris-Meudon), J.M. Marcaide (U. Valencia), M.A. Perez-Torres (IRA/CNR), R.A. Preston (JPL | | Abstract: | We present 5 GHz space-VLBI observations of the quasar pair B1342+662/B1342+663 that demonstrate the feasibility of phase-reference techniques using an antenna in space. The space-based data were taken by the satellite HALCA, of the space-VLBI mission VSOP. From residual (referenced) phases we derive an upper bound of 10 meters to the uncertainty of the spacecraft orbit reconstruction. An analysis of the phase-reference maps of the sources additionally suggests that the above mentioned uncertaintyis likely not larger than 3 meters. With errors of this magnitude, HALCA is a useful tool for astrometric studies of close pairs of radio sources. | | Source: | arXiv, astro-ph/0104365 | | Services: | Forum | Review | PDF | Favorites | |
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