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Multi-wavelength optical aperture synthesis
Marson, R. G.; Bedding, T. R.; Robertson, J. G.
AA(Sydney Univ; CSIRO, Div. of Radiophysics, Epping, Australia), AB(Sydney Univ., Australia), AC(Sydney Univ., Australia)
Astronomical Society of Australia, Proceedings (ISSN 0066-9997), vol. 10, no. 1, p. 71-73.
Publication Date:
Instrumentation and Photography
NASA/STI Keywords:
Apertures, Radio Astronomy, Telescopes, Atmospheric Turbulence, Diffraction Patterns, Image Analysis, Red Giant Stars, Stellar Atmospheres, Visibility
Bibliographic Code:


The technique of aperture synthesis is well developed in radio astronomy. When applied to the optical regime, aperture synthesis allows one to partially overcome the blurring effects of the atmosphere and increase the angular resolution of large telescopes to the diffraction limit. MAPPIT (Masked APerture-Plane Interference Telescope) is a multielement interferometer which operates at the coude focus of the 3.9 m Anglo-Australian Telescope. This instrument has recently been reconfigured to operate in a dispersed mode so that simultaneous observations in a band of wavelengths are possible. We will discuss this instrument's new mode and present observations of the double star Delta Sco and an angular diameter of the previously unresolved red giant Beta Gru.

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