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Utrecht Echelle Spectrograph (UES)
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De-commissioned: 31 July 2002.
Designed and built by:
Institute of Astronomy, Utrecht, under a contract placed by RGO with
the Netherlands Foundation for Radio Astronomy. A formal specification
was issued in May 1986. The acquisition and guidance unit was constructed at
the Kapteyn Institute at Roden.
Description: The Utrecht
Echelle Spectrograph (UES) is the principal high-resolution spectrograph for
the William Herschel Telescope, and is permanently mounted at one of the
f/11 Nasmyth foci. The design is similar from the astronomer's viewpoint to
one being produced for the f/36 coudé focus Anglo-Australian Telescope by a team at University
College London. This similarity is beneficial in the use of the spectrographs
and data reduction as well as in the production phase.
A new UES derotator was commissioned in December 1997. The new derotator has
high UV throughput, but a small field of view. The old derotator remains
available for long-slit work.
Some scientific highlights: More information: UES
Users' Manual
More photos of this instrument: http://www.ing.iac.es/PR/archive/wht/instruments.html
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