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Then ISIS Fibre System

The ISIS fibre system enables the ISIS spectrograph on the WHT to be fed with fibre optic bundles. The bundles link the auxiliary focus, located on the acquisition and guiding box, with the ISIS slit area (see figure 9). Below this position, ISIS can be configured in the same way as for the long-slit unit. Then, both arms and FOS can be used in the usual form. However, several ISIS facilities, including autoguider and comparison lamps, cannot be used.

The ISIS fibres system is composed of the following elements:

Fri Jan 7 15:34:48 GMT 1994