Final design and assembly of the GHOST Cassegrain unit

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

doi:10.1117/12.2313059

Final design and assembly of the GHOST Cassegrain unit

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

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

11 Citations (Scopus)

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.

Original language	English
Title of host publication	Ground-based and Airborne Instrumentation for Astronomy VII
Editors	Luc Simard, Luc Simard, Christopher J. Evans, Hideki Takami
Publisher	SPIE
ISBN (Print)	9781510619579
DOIs	https://doi.org/10.1117/12.2313059
Publication status	Published - 2018
Event	Ground-based and Airborne Instrumentation for Astronomy VII 2018 - Austin, United States Duration: 10 Jun 2018 → 14 Jun 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10702
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-based and Airborne Instrumentation for Astronomy VII 2018
Country/Territory	United States
City	Austin
Period	10/06/18 → 14/06/18

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10.1117/12.2313059

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Zhelem, R., Churilov, V., Kondrat, Y., Waller, L., Lawrence, J., Edgar, M., Baker, G., Farrel, T., Young, P., Nielsen, J., Mali, S., Muller, R., Klauser, U., Pai, N., Ireland, M., Sheinis, A., Robertson, G., Case, S., & Mcdermid, R. (2018). Final design and assembly of the GHOST Cassegrain unit. In L. Simard, L. Simard, C. J. Evans, & H. Takami (Eds.), Ground-based and Airborne Instrumentation for Astronomy VII Article 107026H (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10702). SPIE. https://doi.org/10.1117/12.2313059

@inproceedings{aa5b52c474704dcaa205f78789ebead0,

title = "Final design and assembly of the GHOST Cassegrain unit",

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.",

keywords = "spectrograph Gemini ADC positioner high-resolution IFU",

author = "Ross Zhelem and Vladimir Churilov and Yuriy Kondrat and Lewis Waller and Jon Lawrence and Michael Edgar and Gabriella Baker and Tony Farrel and Peter Young and Jon Nielsen and Slavko Mali and Rolf Muller and Urs Klauser and Naveen Pai and Michael Ireland and Andrew Sheinis and Gordon Robertson and Scott Case and Richard Mcdermid",

note = "Publisher Copyright: {\textcopyright} 2018 SPIE.; Ground-based and Airborne Instrumentation for Astronomy VII 2018 ; Conference date: 10-06-2018 Through 14-06-2018",

year = "2018",

doi = "10.1117/12.2313059",

language = "English",

isbn = "9781510619579",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Luc Simard and Luc Simard and Evans, {Christopher J.} and Hideki Takami",

booktitle = "Ground-based and Airborne Instrumentation for Astronomy VII",

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Zhelem, R, Churilov, V, Kondrat, Y, Waller, L, Lawrence, J, Edgar, M, Baker, G, Farrel, T, Young, P, Nielsen, J, Mali, S, Muller, R, Klauser, U, Pai, N, Ireland, M, Sheinis, A, Robertson, G, Case, S & Mcdermid, R 2018, Final design and assembly of the GHOST Cassegrain unit. in L Simard, L Simard, CJ Evans & H Takami (eds), Ground-based and Airborne Instrumentation for Astronomy VII., 107026H, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10702, SPIE, Ground-based and Airborne Instrumentation for Astronomy VII 2018, Austin, United States, 10/06/18. https://doi.org/10.1117/12.2313059

Final design and assembly of the GHOST Cassegrain unit. / Zhelem, Ross; Churilov, Vladimir; Kondrat, Yuriy et al.
Ground-based and Airborne Instrumentation for Astronomy VII. ed. / Luc Simard; Luc Simard; Christopher J. Evans; Hideki Takami. SPIE, 2018. 107026H (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10702).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Final design and assembly of the GHOST Cassegrain unit

AU - Zhelem, Ross

AU - Churilov, Vladimir

AU - Kondrat, Yuriy

AU - Waller, Lewis

AU - Lawrence, Jon

AU - Edgar, Michael

AU - Baker, Gabriella

AU - Farrel, Tony

AU - Young, Peter

AU - Nielsen, Jon

AU - Mali, Slavko

AU - Muller, Rolf

AU - Klauser, Urs

AU - Pai, Naveen

AU - Ireland, Michael

AU - Sheinis, Andrew

AU - Robertson, Gordon

AU - Case, Scott

AU - Mcdermid, Richard

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - spectrograph Gemini ADC positioner high-resolution IFU

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U2 - 10.1117/12.2313059

DO - 10.1117/12.2313059

M3 - Conference contribution

SN - 9781510619579

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Ground-based and Airborne Instrumentation for Astronomy VII

A2 - Simard, Luc

A2 - Evans, Christopher J.

A2 - Takami, Hideki

PB - SPIE

T2 - Ground-based and Airborne Instrumentation for Astronomy VII 2018

Y2 - 10 June 2018 through 14 June 2018

ER -

Final design and assembly of the GHOST Cassegrain unit

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