The EMCCD-Based Speckle Interferometer of the BTA 6-m Telescope: Description and First Results

Details The EMCCD-Based Speckle Interferometer of the BTA 6-m Telescope: Description and First Results The EMCCD-Based Speckle Interferometer of the BTA 6-m Telescope: Description and First Results

2009-09-07

arxiv.org/abs/0909.1119v1

Astrophys.Bull.64:296-307,2009

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

18 pages, 14 figures

Scientific paper

10.1134/S1990341309030092

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$\times$512 pix resolution) per second storage on the hard drive. Due to high quantum efficiency (93% in the maximum at 550 nm), and high transmission of its optical elements, the new camera can be used for diffraction-limited (0.02$''$) image reconstruction of $15^{m}$ stars under good seeing conditions. The main advantages of the new system over the previous generation BTA speckle interferometer are examined.

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