The Ultra-High-Resolution Facility at the Anglo-Australian Telescope

Details The Ultra-High-Resolution Facility at the Anglo-Australian Telescope The Ultra-High-Resolution Facility at the Anglo-Australian Telescope

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.272..323d&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 272, Issue 2, pp. 323-332.

Astronomy and Astrophysics

Astronomy

53

Line, Profiles-Instrumentation, Spectrographs-Ism, Atoms-Ism, Clouds.

Scientific paper

The Ultra-High-Resolution Facility (UHRF) has been commissioned at the coude focus of the Anglo-Australian Telescope (AAT), and provides a resolving power of R~=10^6. This is the highest spectral resolution ever obtained by an optical astronomical spectrograph, and is intended mainly for astrophysical studies of cool interstellar clouds. This paper describes the development of this ambitious project, which includes diffraction-limited optical components, very tight specification for the optical configuration, and a new type of image slicer which allows ultra-high-resolution work towards faint stars. Astrophysical results from the first observing runs are presented to demonstrate the performance in terms of both resolution and throughput.

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