2004/12/17 by P. Charlot, Charlot, P., A. L. Fey +10
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #GNSS positioning and interference #Geophysics and Gravity Measurements #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0412458
4 pages. 3 figures. Proceedings of the 7th European VLBI Network Symposium held in Toledo, Spain on October 12-15, 2004. Editors: R. Bachiller, F. Colomer, J.-F. Desmurs, P. de Vicente (Observatorio Astronomico Nacional), p. 313-316. Needs evn2004.cls
arxiv created 2004/12/17 · openalex publication_date 2004/12/17 · arxiv updated 2009/12/01 · openalex created_date 2019/07/30 · openalex updated_date 2026/07/28
The current realization of the International Celestial Reference Frame (ICRF)\ncomprises a total of 717 extragalactic radio sources distributed over the\nentire sky. An observing program has been developed to densify the ICRF in the\nnorthern sky using the European VLBI network (EVN) and other radio telescopes\nin Spitsbergen, Canada and USA. Altogether, 150 new sources selected from the\nJodrell Bank-VLA Astrometric Survey were observed during three such EVN+\nexperiments conducted in 2000, 2002 and 2003. The sources were selected on the\nbasis of their sky location in order to fill the "empty" regions of the frame.\nA secondary criterion was based on source compactness to limit structural\neffects in the astrometric measurements. All 150 new sources have been\nsuccessfully detected and the precision of the estimated coordinates in right\nascension and declination is better than 1 milliarcsecond (mas) for most of\nthem. A comparison with the astrometric positions from the Very Long baseline\nArray Calibrator Survey for 129 common sources indicates agreement within 2 mas\nfor 80% of the sources.\n