Share Email Print
cover

Proceedings Paper

Overview and status of the Giant Magellan Telescope project
Author(s): Rebecca A. Bernstein; Patrick J. McCarthy; Keith Raybould; Bruce C. Bigelow; Atonin H. Bouchez; José M. Filgueira; George Jacoby; Matt Johns; David Sawyer; Stephen Shectman; Michael Sheehan
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The Giant Magellan Telescope (GMT) is a 25.4-m diameter, optical/infrared telescope that is being built by an international consortium of universities and research institutions as one of the next generation of Extremely Large Telescopes. The primary mirror of GMT consists of seven 8.4 m borosilicate honeycomb mirror segments that are optically conjugate to seven corresponding segments in the Gregorian secondary mirror. Fabrication is complete for one primary mirror segment and is underway for the next two. The final focal ratio of the telescope is f/8.2, so that the focal plane has an image scale of 1.02 arcsec/mm. GMT will be commissioned using a fast-steering secondary mirror assembly comprised of conventional, rigid segments to provide seeing-limited observations. A secondary mirror with fully adaptive segments will be used in standard operation to additionally enable ground-layer and diffraction-limited adaptive optics. In the seeing limited mode, GMT will provide a 10 arcmin field of view without field correction. A 20 arcmin field of view will be obtained using a wide-field corrector and atmospheric dispersion compensator. The project has recently completed a series of sub-system and system-level preliminary design reviews and is currently preparing to move into the construction phase. This paper summarizes the technical development of the GMT sub-systems and the current status of the GMT project.

Paper Details

Date Published: 22 July 2014
PDF: 16 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91451C (22 July 2014); doi: 10.1117/12.2055282
Show Author Affiliations
Rebecca A. Bernstein, The Giant Magellan Telescope Project Corp. (United States)
Carnegie Observatories (United States)
Patrick J. McCarthy, The Giant Magellan Telescope Project Corp. (United States)
Carnegie Observatories (United States)
Keith Raybould, The Giant Magellan Telescope Project Corp. (United States)
Bruce C. Bigelow, The Giant Magellan Telescope Project Corp. (United States)
Atonin H. Bouchez, The Giant Magellan Telescope Project Corp. (United States)
José M. Filgueira, The Giant Magellan Telescope Project Corp. (United States)
George Jacoby, The Giant Magellan Telescope Project Corp. (United States)
Matt Johns, The Giant Magellan Telescope Project Corp. (United States)
Carnegie Observatories (United States)
David Sawyer, The Giant Magellan Telescope Project Corp. (United States)
Stephen Shectman, Carnegie Observatories (United States)
Michael Sheehan, The Giant Magellan Telescope Project Corp. (United States)


Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

© SPIE. Terms of Use
Back to Top