Mt Graham Telescopes

Mount Graham in Graham County, Arizona, hosts three professional telescopes: VATT, SMT and LBT, supported by MGIO.
VATT (Vatican Advanced Technology Telescope) is an optical telescope with a primary-mirror diameter of 1.8 m (6 ft). It is a facility of the Vatican Observatory, resulting from its collaboration with the University of Arizona's Steward Observatory.

The Vatican Observatory is the only scientific research institute of the Vatican City State. Its origins date back to 1582, and its headquarters are at the Papal Summer Residence of Castel Gandolfo near Rome, Italy. It moved there in 1935 because lack of quality light made cosmic light inaccessible in Rome. Already in the 1960s, however, the search for quality light resumed.  Since January 1981, the Vatican Observatory's observational research projects were relocated to Tucson, Arizona, where the Vatican Observatory Research Group was launched as a branch of the Observatory. It is hosted by the University of Arizona's Steward Observatory. In the mid 1980s the Vatican Observatory and Steward Observatory agreed to build VATT which was dedicated in September 1993.

SMT (SubMillimeter Telescope) is a radio telescope with a dish diameter of 10 m (33 ft). It is operated by the Arizona Radio Observatory.
The Arizona Radio Observatory (ARO) owns and operates two radio telescopes in southern Arizona: The SMT and a 12 Meter Alma Prototype Telescope located 50 miles South-West of Tucson on Kitt Peak. Combined, the two telescopes routinely cover the entire millimeter and submillimeter windows from about 4.6 mm to about 0.6 mm, and at the SMT observations can be made all the way to 0.3 mm. The telescopes are operated around-the-clock for about 9 to 10 months per year for a combined 10,000 hours per observing season. The ARO offices are centrally located in the Steward Observatory building on the campus of the University of Arizona in Tucson, Arizona.

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LBT (Large Binocular Telescope) is an optical telescope with two primary mirrors on a common mount. Each primary has a diameter of 8.4 m (28 ft). It is the world's most powerful optical telescope of today. In light-gathering power it is equivalent to a single 11.8 m (39 ft) telescope and in resolution to a 22.8 m (75 ft) telescope. It is operated by the LBT Corporation, an international consortium of US, German and Italian partners.

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Mount Graham International Observatory (MGIO) is a division of Steward Observatory, the research arm for the Department of Astronomy at the University of Arizona. Scientific researchers from around the world make use of MGIO facilities. MGIO serve this community, operating and maintaining facilities at the remote observing site located in the Pinale├▒o Mountains in southeast Arizona. This area is part of the Coronado National Forest, administered by the Safford Ranger District, U.S. Forest Service. The MGIO office, or Base Camp, is located at the eastern base of Mount Graham, six miles south of Safford, Arizona.