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Vatican Advanced Technology Telescope
VATT from ground level
from ground level
Organization Vatican Observatory Research Group
Code 290  
Location Mount Graham International Observatory, Mount Graham, Graham County, Arizona, United States
Coordinates
Altitude 3178 m
Website
vaticanobservatory.org
Telescopes
VATT from the balcony of the nearby LBT

The 1.8 meter Alice P. Lennon Telescope and its Thomas J. Bannan Astrophysics Facility, known together as the Vatican Advanced Technology Telescope (VATT), is a Gregorian telescope observing in the optical and infrared which achieved 'first light', the first starlight to pass through the telescope onto a detector, in 1993.

VATT is part of the Mount Graham International Observatory situated on Mount Graham in southeast Arizona, and is operated by the Vatican Observatory, one of the oldest astronomical research institutions in the world, in partnership with The University of Arizona.

Design[edit]

Optical System Aplanatic Gregorian f/9
Focal Length 16.48 m
Primary Mirror f/1.0, Diameter 1.83 m
Secondary Mirror f/0.9, Diameter 0.38 m

(Focus Control: 0.1 micrometre)

Field of View 72 mm (15')
Scale 12.52 "/mm
Image Quality 0.1 ' - 6.8 "
Mount Alt-Az + Derotator

The heart of the telescope is an f/1.0 honeycombed construction, borosilicate primary mirror. The VATT's mirror is unusually 'fast', f/1, which means that its focal distance is equal to its diameter. Because it has such a short focal length, a Gregorian design could be employed which uses a concave secondary mirror at a point beyond the primary focus; this allows unusually sharp focusing across the field of view.

The unusual optical design and novel mirror fabrication techniques mean that both the primary and secondary mirrors are among the most exact surfaces ever made for a ground-based telescope. In addition, the skies above Mount Graham are among the most clear, steady, and dark in the continental North America. Seeing of better than one arc-second even without adaptive optics can be achieved on a regular basis.

Construction[edit]

The primary mirror was manufactured at The University of Arizona's Steward Observatory Mirror Laboratory, which pioneered both the spin-casting and the stressed-lap polishing techniques which are being used for telescope mirrors that include the 6.5 meter aperture MMT and Magellan telescopes and the two 8.4 meter mirrors of the Large Binocular Telescope.

Research[edit]

Given its excellent optical qualities, the telescope has been used primarily for imaging and photometric work, in which it regularly outperforms much larger telescopes located elsewhere. Among the notable results from this telescope have been the discovery of MACHOs in the Andromeda Galaxy; the validation of the Stromvil photometric filter system; evidence for how the shape and dimensions of galaxies have changed over the age of the universe; discovery of the first binary 'Vesta chip' asteroid; and the characterization and classification by visible colors of some 100 Trans-Neptunian objects, most of them fainter than magnitude 21.

Funding[edit]

The government of the Vatican City State supports the Vatican Observatory staff and regular research costs, but the cost to build and maintain the VATT itself has come from private donors:

Other MGIO facilities[edit]

See also[edit]

External links[edit]

  • VATT - official site
  • [1] - VATT and Lucifer are separate
  • Eastern Arizona College's Discovery Park Campus - Guided MGIO tours for the public
  • [2] - Popular Science - "Lucifer is part of the Large Binocular Telescope, which happens to be right next to the Vatican Observatory on Mt. Graham in Tucson."

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Vatican_Advanced_Technology_Telescope — Please support Wikipedia.
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