Anglo-Australian Telescope


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Anglo-Australian Telescope

(AAT) The 3.9-meter reflecting telescope of the Anglo-Australian Observatory, sited at an altitude of 1150 meters. It was funded jointly by the governments of Australia and the UK, each country having a half share in observing time. It began regular operation in 1975 and is now equipped for both optical and infrared observations. It has Ritchey–Chrétien optics and a Cer-Vit mirror and works at a focal ratio of f/3.3 at the prime focus, f/8 at the Cassegrain foci, f/15 for infrared work, and f/35 at the coudé focus. It has a limiting magnitude of 23–25 (depending on wavelength and technique used), the maximum field of view covering about one square degree of sky. The telescope has an equatorial mounting, and is computer controlled so that the pointing and tracking are exceptionally accurate.
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