On the stability of Cassegrain spectrographs

Details On the stability of Cassegrain spectrographs On the stability of Cassegrain spectrographs

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.281..673w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 281, Issue 2, pp. 673-678.

Astronomy and Astrophysics

Astronomy

1

Instrumentation: Spectrographs, Telescopes

Scientific paper

Gravity-induced flexure has been a long-standing challenge in Cassegrain spectrographs at 4-m class telescopes; it is more so on the scale of 8-m telescopes. This is of particular concern for the Gemini High Resolution Optical Spectrograph, which will be Cassegrain-mounted for its routine mode of operation. In this paper we address the general flexure problem and make specific recommendations. In a companion paper we present results on experimental compensation for flexure in a specific Cassegrain spectrograph - ISIS on the 4.2-m William Herschel Telescope (WHT).

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