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Coronagraphic Methods for Detecting Faint Astronomical Objects Near Bright Ones: Application to the 2.5-m Telescope of Sternberg Astronomical Instituteстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 5 июня 2017 г.
- Авторы: Cherepashchuk A.M., Bugaenko O.I., Kim I.S., Popov V.V.
- Журнал: Astronomy Reports
- Том: 61
- Номер: 3
- Год издания: 2017
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 169
- Последняя страница: 177
- DOI: 10.1134/S1063772917030039
- Аннотация: Possible methods for reducing the instrumental background of astronomical telescopes arediscussed: the classical Lyot coronagraphic method, the multi-cascade coronagraphic method, the use ofspecial masks in the plane of the entrance aperture, and the use of super-smooth and medium-smoothprimary optics. For the first time, analytical expressions describing the intensity distribution at the exit pupil are presented for the case when a mask is introducted in the primary focal planein order to block the light from a bright object. An algorithm for computing the point-spread function (PSF) of a coronagraphic telescope employing super-smooth primary optics and the coronographic method is proposed. Computed PSFs for the 2.5-m telescope of the Caucasian Mountain Observatory of the Sternberg Astronomical Institute are presented, without allowance for diffusive and turbulent scattering in the Earth’s atmosphere, and for operation both without coronagraphic elements and in the coronagraphic mode of the telescope.
- Добавил в систему: Ким Ираида Сергеевна