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William Herschel Telescope

A&G Unit: Cassegrain Acquisition and Guidance Unit

Designed and built by: RGO.

Description: The Acquisition and Guiding Unit provides a rigid support for the acquisition television camera and autoguider systems it contains, and a mounting for the Cassegrain instruments. The autoguider is based on the use of a CCD as detector, which is fed by means of a scanning prism assembly which can rotate about the instrument axis and be moved radially to acquire an appropiate guide star. In addition to the main instrument mounting face, the unit has an auxiliary focal station, the so-called Auxiliary Port Camera. This unit also provides another auxiliary port.

Time allocations:
Nights scheduled since semester 2007B

Instrument information:

ING Technical Note No. 56

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Last modified: 08 November 2023