SAO RAS

It is the largest Russian astronomical center for ground-based observations of objects in the Universe. The main instruments of the Observatory are the Big Telescope Alt-azimuthal (BTA), an optical reflector with the primary mirror 6 metres in diameter and the radio telescope RATAN-600 (abbreviated from the RAdio Telescope of the Academy of Sciences) with a 600 metre multielement ring antenna. The telescopes have the status of open public instruments, permitting broad integration with the world astronomical community. The observational time is allocated by the Time Allocation Committee (The Large Telescopes Program Committee). The Observatory is situated in the Northern Caucasus, in the Zelenchukskiy region of the Karachay-Cherkessian Republic of Russia. The BTA was built on the spur of the mount Pastukhov at the height of 2070 m above the sea level. There are two other instruments, a 1 metre Zeiss-1000 telescope and a 0.6 metre reflector, mounted in the close neighbourhood of...