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Proceedings Paper

Status of the Giant Magellan Telescope (GMT) project
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Paper Abstract

The Giant Magellan Telescope (GMT) is a joint project of a consortium of universities and research institutions to build and operate a 21.5-m equivalent aperture astronomical telescope for use at visible and IR wavelengths. This paper briefly summarizes the science goals for the project and provides an overview of the preliminary telescope and enclosure concepts and site test program. The telescope is a Gregorian design with a fast, f/0.7, primary mirror that allows a compact and stiff mount structure. The 25.3-meter diameter primary mirror consists of six off-axis 8.4-meter circular mirrors arranged in a hexagon around a center 8.4-meter mirror. The Gregorian secondary mirror is adaptive allowing two-mirror, wide-field adaptive optics. Several corrector designs have been studied for wide-field applications and one such design is shown. Instruments being considered for GMT provide a wide range of scientific capabilities. Instruments mount below the primary mirror on an instrument platform. Instrument mounting and servicing provisions are summarized.

Paper Details

Date Published: 28 September 2004
PDF: 13 pages
Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); doi: 10.1117/12.550741
Show Author Affiliations
Matt Johns, Carnegie Observatories (United States)
J. Roger P. Angel, Steward Observatory/Univ. of Arizona (United States)
Stephen Shectman, Carnegie Observatories (United States)
Rebecca Bernstein, Univ. of Michigan (United States)
Daniel G. Fabricant, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Patrick McCarthy, Carnegie Observatories (United States)
Mark Phillips, Las Campanas Observatory (Chile)

Published in SPIE Proceedings Vol. 5489:
Ground-based Telescopes
Jacobus M. Oschmann Jr., Editor(s)

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