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Optical Spectra of Candidate Southern Hemisphere International Celestial...
We present the results of spectroscopic observations of the optical counterparts of 47 southern radio sources from the candidate International Celestial Reference Catalogue... -
On the connection of the apparent proper motion and the VLBI structure of...
Many of the compact extragalactic radio sources that are used as fiducial points to define the celestial reference frame are known to have proper motions detectable with long-... -
The Second Realization of the International Celestial Reference Frame by...
We present the second realization of the International Celestial Reference Frame (ICRF2) at radio wavelengths using nearly 30 years of Very Long Baseline Interferometry...
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