Status of the Giant Magellan Telescope (GMT) project

Matt Johns, Roger Angel, Stephen Shectman, Rebecca Bernstein, Daniel Fabricant, Patrick McCarthy, Mark Phillips

Research output: Contribution to journalConference articlepeer-review

45 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)441-453
Number of pages13
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART 1
StatePublished - 2004
EventGround-based Telescopes - Glasgow, United Kingdom
Duration: Jun 21 2004Jun 25 2004


  • Conceptual design
  • GMT Project
  • Giant Magellan Telescope

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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