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Amplitude Interferometry at C.E.R.G.A.

Published online by Cambridge University Press:  02 August 2016

Laurent Koechlin
Laurent Koechlin*
Affiliation:
C.E.R.G.A., 06460 Saint Vallier, France

Extract

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The 12 to 20 metre baseline interferometer at C.E.R.G.A. built by A. Labeyrie has now been operational for two years. The purpose of this instrument was initially to be a prototype showing the feasibility of long baseline coherent arrays and for testing the techniques needed for them. Yet, pending completion of large interferometers, this small 2 x 26 cm instrument has proven able to yield astrophysical data: a dozen stars up to third magnitude have been observed with a 3 x 10-3 arc second resolution on diameters and a 5 x 10-4 arc second accuracy for binary separation measurements in the case of α Aur.

What has been observed both from the technological and the astrophysical point of view will be discussed.

Type
The Scientific Programme
Information
International Astronomical Union Colloquium , Volume 50: High Angular Resolution Stellar Interferometry , January 1979 , pp. 9-1 - 9-5
Copyright
Copyright © 1979

References

1) Anderson, J.A., Ap. J. 51, 263, 1920 Google Scholar
2) Blazit, A., Bonneau, D., Koechlin, L., Labeyrie, A., Ap. J. (Lett.) 214, 279, 1977 Google Scholar
3) Koechlin, L., “Optical Telescopes of the Future” (ESO, Geneva), eds Pacini, F., Richter, W. and Wilson, R.N., p.475, 1977 Google Scholar
4) Labeyrie, A., Ap. J. (Lett.) 196, L71, 1975 Google Scholar
5) Labeyrie, A., “Optical Telescopes of the Future” (ESO, Geneva), eds. Pacini, F., Richter, W. and Wilson, R.N., p.375, 1977 Google Scholar
6) Hanbury Brown, R., Davis, J. and Allen, L.R., Mon. Not. R. astr. Soc., 167, 121, 1974.Google Scholar
7) Michelson, A.A., Ap. J. 51, 257, 1920 Google Scholar