Statistics – Applications
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.217..347d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 217, Nov. 15, 1985, p. 347-354. Research supported by t
Statistics
Applications
9
Astronomical Spectroscopy, High Dispersion Spectrographs, Spectral Resolution, Systems Engineering, High Resolution, Light Transmission, Telescopes
Scientific paper
This paper describes a technique which has been applied to the new AAT coudé échelle spectrograph, under construction at University College London, to increase its throughput without degrading resolution. The effect of illuminating the slit with stellar images and extended objects is considered and a method of increasing the flexibility of the design is presented. The telescope focal ratio is modified by the addition of a lens in front of the slit. The degree of modification can be adjusted to optimize the spectrograph's light throughput under difficult seeing conditions or for different applications. The technique may also be relevant to other spectrographs being designed and could even find applications in some existing instruments.
Diego Francisco
Walker Danielle
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