Orgov Radio-Optical Telescope

The Orgov Radio-Optical Telescope, also known as ROT54 or the Herouni Mirror Radio Telescope, is a radio telescope in Orgov, Armenia.

Orgov Radio-Optical Telescope
Location(s)Orgov, Aragatsotn Province, Armenia
Coordinates40°21′03″N 44°14′27″E
Altitude1,711 m (5,614 ft)
Built1975 –1985  (1975 –1985 )
First light1986 
Telescope styleoptical telescope
radio telescope 
Diameter54 m (177 ft 2 in)
Secondary diameter5 m (16 ft 5 in)
Location of Orgov Radio-Optical Telescope
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Specifications

The telescope is located at the RRI Aragats Scientific Centre in Orgov, Armenia. It is on Mount Aragats,[1] at a height of 1,711 metres (5,614 ft).[2]

The radio telescope has a diameter of 54 m (177 ft). It is hemispherical, and fixed to the ground, with a movable secondary mirror with a diameter of 5 m (16 ft).[1] This provides a useful diameter of 32 m (105 ft). It has a surface accuracy around 70/100 μm, giving an operating wavelength of 30-3mm (10-100GHz),[3] and was originally designed to observe down to 1 mm (300 GHz).[1]

The optical telescope has a 2.6 m (8.5 ft) mirror, with a 10 m (33 ft) focal length.[1] Telescope never operates from the date of its implementation.

History

Construction took place between 1975 and 1985,[1] first operating in 1986.[3] It was not damaged by the 1988 Armenian earthquake,[2] and was used for observations between 1987 and 1990.[2]

It stopped being used around 1990, and in the mid-1990s a plan to restore the telescope to use it for astronomy was proposed.[3] It was subsequently restructured in 1995-2010, with a new control computer, new feeds, and observations in collaboration with the Astronomical Society of Russia and the National Technical University of Athens.[2]

From around 2012 onwards, moving the secondary mirror was not possible due to a defective control arm, with a restoration plan in 2018 so that the telescope can be used in the European VLBI Network.[2]

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References
  1. Herouni, Paris M. (2007). "Measured Parameters of Large Antenna of ROT-54/2.6 Tell about Absence of Big Bang" (PDF). National Academy of Sciences of Armenia Reports. 107: 73.
  2. Sargsyan, Arevik (4–5 October 2018). "Presentation of ROT-54/2.6" (PDF).CS1 maint: date format (link)
  3. Martin, J. M.; Rosolen, C. (October 1995). "Perspectives of the ROT 54/32/2.6 in astronomy". Astrophysics. 38 (4): 361–363. Bibcode:1995Ap.....38..361M. doi:10.1007/BF02044713.
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