On the stability of Cassegrain spectrographs

D. D. Walker, P. D'Arrigo

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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).

Original languageEnglish
Pages (from-to)673-678
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - 11 Jul 1996
Externally publishedYes


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