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Proceedings Paper

Overview and status of the Giant Magellan Telescope project
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Paper Abstract

The Giant Magellan Telescope project is proceeding with design, fabrication, and site construction. The first of the seven required 8.4-m primary mirror segments is completed and in storage, three segments are in various stages of grinding and polishing, and the fifth segment has been cast. Industry contracts are underway to complete the design of the telescope structure. Residence buildings and other facilities needed to support construction at the Las Campanas site in Chile are complete. Hard rock excavation is imminent in preparation for the pouring of concrete for the telescope pier and other foundations. Computational fluid dynamics analysis is informing the design of the telescope enclosure, and further construction work packages are being readied for tender. Seismic design considerations have resulted in the incorporation of a seismic isolation system into the telescope pier, as well as modifications to the primary mirror support system. Designs for the fast-steering and adaptive secondary mirrors, science instruments, and other subsystems are maturing. Prototyping is underway in various aspects, including on-sky testing of wavefront sensing and control elements, and the telescope metrology system. Our fabrication and construction schedule calls for engineering first light with a subset of primary mirror segments in late 2023, with buildout to the full configuration occurring in stages, paced by the availability of primary mirror segments and other components.

Paper Details

Date Published: 6 July 2018
PDF: 14 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070012 (6 July 2018); doi: 10.1117/12.2313340
Show Author Affiliations
James Fanson, GMTO Corp. (United States)
Patrick J. McCarthy, GMTO Corp. (United States)
Carnegie Observatories (United States)
Rebecca Bernstein, GMTO Corp. (United States)
Carnegie Observatories (United States)
George Angeli, GMTO Corp. (United States)
David Ashby, GMTO Corp. (United States)
The Univ. of Arizona (United States)
Bruce Bigelow, GMTO Corp. (United States)
Antonin Bouchez, GMTO Corp. (United States)
William Burgett, GMTO Corp. (United States)
Eric Chauvin, GMTO Corp. (United States)
Adam Contos, GMTO Corp. (United States)
Francisco Figueroa, GMTO Corp. (United States)
Peter Gray, GMTO Corp. (United States)
Frank Groark, GMTO Corp. (United States)
Robert Laskin, GMTO Corp. (United States)
Rafael Millan-Gabet, GMTO Corp. (United States)
Andrew Rakich, GMTO Corp. (United States)
Rodrigo Sandoval, GMTO Corp. (United States)
Marti Pi, GMTO Corp. (United States)
Nune Wheeler, GMTO Corp. (United States)

Published in SPIE Proceedings Vol. 10700:
Ground-based and Airborne Telescopes VII
Heather K. Marshall; Jason Spyromilio, Editor(s)

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