Modernization of the Sintez telescope at the Crimean astrophysical observatory

In 1978, the Sintez experimental telescope was put into operation at the Crimean Astrophysical Observatory (CrAO). The purpose of its creation was to develop technologies for segmented optics, as well as a system for controlling the spatial position of mirrors, including those with the ability to compensate for turbulence in the earth's atmosphere due to the rapid movement of each mirror along two axes. At the beginning of 2018, a decision was made to restore it with the creation of new optics and a control system. In 2021, the control system was made, and a temporary 350 mm telescope was fixed on the main tube of the telescope, which made it possible to start the first test and scientific observations. Automation of observations imposes increased requirements on the protection of the telescope from many factors. Therefore, the authors implemented a number of protective functions that exclude emergency situations without human. Scientific tasks: photometry and astrometry of a wide range of objects, alert observations (gamma-ray burst afterglows, gravitational-wave events), search operations (asteroids and comets, novae and supernovae, transients, etc.). In this paper, we present a detailed description of the restoration process, the modernization of the telescope, and the first results.