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Multi-wavelength Optical Aperture Synthesis

  • R.G. Marson (a1), T.R. Bedding (a1) and J.G. Robertson (a1)

Abstract

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 multi-element 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 δ Sco and an angular diameter of the previously unresolved red giant β Gru.

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Copyright

References

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Bedding, T.R. and Robertson, J.G., 1989, Proc. Astron. Soc. Aust., 8, 78.
Haniff, CA., Mackay, C.D., Titterington, D.J., Sivia, D., Baldwin, J.E. and Warner, P.J., 1987, Nature, 328, 694
Nakajima, T., Kulkami, S.R., Gorham, P.W., Ghez, A.M., Neugebauer, G., Oke, J.B., Prince, T.A. and Readhead, A.C.S., 1989, Astron. J., 97, 1510.
Readhead, A.C.S., Nakajima, T.S., Pearson, T.J., Neugebauer, G., Oke, J.B. and Sargent, W.L., 1988, Astron. J., 95, 1278.
Robertson, J.G., Bedding, T.R., Marson, R.G., Gillingham, P.R., Frater, R.H., and O’Sullivan, J.D. 1991, Proc. Astron. Soc. Aust., 9, 162.

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