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Siding Spring 2.3 m Telescope

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The 2.3 m Telescope at Siding Spring Observatory is operated by the Australian National University. The 2.3m Advanced Technology Telescope was constructed during the early 1980s and featured at-the-time radical features: an alt-az mount and co-rotating dome.

Instrumentation includes:

  • An integral field spectrograph (WiFeS)

  • Nasmyth Imager

  • Cassegrain IR imager (CASPIR)


The telescope is a workhorse for numerous large programs where it is used to winnow down candidate objects for more extensive observation at larger telescopes and is a valuable tool for training graduate students in the at-times black arts of observing