Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasp..104..246w&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 104, no. 674, April 1992, p. 246-250.
Astronomy and Astrophysics
Astronomy
Astrometry, Brightness Temperature, Extragalactic Radio Sources, Faint Objects, Supernovae, Color-Magnitude Diagram, Optical Properties, Radio Interferometers, Stellar Spectra
Scientific paper
The problem of establishing in astrometry the relationship between the different reference frames, such as the solar-system dynamical frame, the galactic stellar frame, and the extragalactic radio source-based frame, is addressed. It is suggested that the faint optical, radio-bright extragalactic source-based and bright optical, faint radio star-based reference frames can be related to a milliarcsecond or better accuracy by using the occasional optically bright radio supernovae (RSN) as precise fiducial points on both reference frames. These independent reference-frame relationships can be accomplished from currently available ground-based platforms. About two bright (less than about 12 mV) supernovae per decade which could serve as useful candidates for combined radio-optical astrometric observations are anticipated.
Johnston Ken J.
Van Dyk Schuyler D.
Weiler Kurt W.
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