Hostname: page-component-7bb8b95d7b-wpx69 Total loading time: 0 Render date: 2024-09-11T21:01:22.829Z Has data issue: false hasContentIssue false
  • English
  • Français

VLBI phase-referencing for observations of weak radio sources

Published online by Cambridge University Press:  12 April 2016

J.-F Lestrade
J.-F Lestrade*
Affiliation:
Observatoire de Meudon, DERAD, F-92195, Meudon, Principal Cedex and Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California, 91011

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Phase-referencing is a technique used in VLBI to extend the signal coherence time from a few minutes to a few hours in order to enhance significantly its sensitivity. With this technique, VLBI observations of milliJansky radio sources can be conducted for high-accuracy differential astrometry as well as imaging. We describe the technique in some details and present, as an example, a submilliarcsecond differential astrometric experiment design to identify the star responsible for the weak radio emission in the binary system Algol.

Type
VLBI Imaging
Information
International Astronomical Union Colloquium , Volume 131: Radio Interferometry: Theory, Techniques, and Applications , 1991 , pp. 289 - 297
Copyright
Copyright © Astronomical Society of the Pacific 1991

References

Alef, W., 1988, IAU Symposium 129, The Impact of VLBI on Astrophysics and Geophysics, ed. Reid, M.J. and Moran, J.M., Kluwer, Dordrecht, 523.Google Scholar
Chariot, P. 1990, A. J., 99, 1309.Google Scholar
Davis, J.L., Herring, T.A., Shapiro, I.I., Rogers, A.E.E., Elgered, G., 1985, Rad. Sc., 20, 1593 Google Scholar
Gwinn, C., these ProceedingsGoogle Scholar
Lanyi, G.E., 1984, Telecommunication and Data Acquisition Prog. Rep., 42-78, pp. 152–159, Jet Propulsion Laboratory, Pasadena, CA, April-June 1984.Google Scholar
Lanyi, G.E., Roth, T., 1988, Rad. Sc., 23. 483 Google Scholar
Lestrade, J-F., Rogers, A.E.E., Whitney, A.R., Niell, A.E., Phillips, R.B., Preston, R.A., 1990, A. J., 99, 1663.Google Scholar
Rogers, A.E.E. et al, 1983, Sciences, 219, 51 Google Scholar
Rogers, A.E.E., Moffet, A.T., Backer, D.C., Moran, J.M., 1984, Rad. Sc., 19, 1552.Google Scholar
Sovers, O.J., Fanselow, J.L., 1987, JPL Publication 83–89, Rev. 3, Jet Propulsion Laboratory, Pasadena. CAGoogle Scholar
Treuhaft, R.N., Lanyi, G.E., 1987 Rad. Sc., 22, 251.Google Scholar