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Proceedings Paper

Final design and assembly of the GHOST Cassegrain unit
Author(s): Ross Zhelem; Vladimir Churilov; Yuriy Kondrat; Lewis Waller; Jon Lawrence; Michael Edgar; Gabriella Baker; Tony Farrel; Peter Young; Jon Nielsen; Slavko Mali; Rolf Muller; Urs Klauser; Naveen Pai; Michael Ireland; Andrew Sheinis; Gordon Robertson; Scott Case; Richard McDermid
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Paper Abstract

GHOST is a high resolution spectrograph system currently being built for the Gemini South Observatory in Chile. In the Cassegrain unit, the observational targets are acquired on integral field units and guided during science exposures, feeding the fiber cable to the temperature-stabilized echelle spectrograph. The Cassegrain unit is mounted on the Gemini telescope, and consists of a main structural plate, the two object positioners and ballast frame. The image from each of the two science beams passes through a field lens and a mini-atmospheric dispersion corrector and is then captured by the integral field unit. The positioner moves each corrector-integral field unit assembly across the focal surface of the telescope. The main structural plate provides the interface for the positioner and ballast frame to the telescope structure. In this paper we describe the final design and assembly of the GHOST Cassegrain unit and report on the outcome of on-sky testing at the telescope in Chile.

Paper Details

Date Published: 6 July 2018
PDF: 16 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107026H (6 July 2018); doi: 10.1117/12.2313059
Show Author Affiliations
Ross Zhelem, Australian Astronomical Observatory (Australia)
Vladimir Churilov, Australian Astronomical Observatory (Australia)
Yuriy Kondrat, Australian Astronomical Observatory (Australia)
Lewis Waller, Australian Astronomical Observatory (Australia)
Jon Lawrence, Australian Astronomical Observatory (Australia)
Michael Edgar, Australian Astronomical Observatory (Australia)
Gabriella Baker, Australian Astronomical Observatory (Australia)
Tony Farrel, Australian Astronomical Observatory (Australia)
Peter Young, The Australian National Univ. (Australia)
Jon Nielsen, The Australian National Univ. (Australia)
Slavko Mali, Australian Astronomical Observatory (Australia)
Rolf Muller, Australian Astronomical Observatory (Australia)
Urs Klauser, Australian Astronomical Observatory (Australia)
Naveen Pai, Australian Astronomical Observatory (Australia)
Michael Ireland, The Australian National Univ. (Australia)
Andrew Sheinis, Canada-France-Hawaii Telescope (United States)
Gordon Robertson, Australian Astronomical Observatory (Australia)
The Univ. of Sydney (Australia)
Scott Case, Australian Astronomical Observatory (Australia)
Richard McDermid, Macquarie Univ. (Australia)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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