The description is given for the speckle interferometer of the BTA 6-m telescope of the SAO RAS based on a new detector with an electron multiplication CCD. The main components of the instrument are microscope objectives, interference filters and atmospheric dispersion correction prisms. The PhotonMAX-512B CCD camera using a back-illuminated CCD97 allows up to 20 speckle images (with 512×512 pix resolution) per second storage on the hard drive. Due to high quantum efficiency (93% in the maximum at 550 nm), and high transmission of its optical elements, the new camera can be used for diffraction-limited (0. 02″) image reconstruction of 15m stars under good seeing conditions. The main advantages of the new system over the previous generation BTA speckle interferometer are examined. © 2009 Pleiades Publishing, Ltd.
CITATION STYLE
Maksimov, A. F., Balega, Y. Y., Dyachenko, V. V., Malogolovets, E. V., Rastegaev, D. A., & Semernikov, E. A. (2009). The EMCCD-based speckle interferometer of the BTA 6-m telescope: Description and first results. Astrophysical Bulletin, 64(3), 296–307. https://doi.org/10.1134/S1990341309030092
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