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The G2 CCD camera at Ondrejov observatory
 Observatory of the Astronomical Institute of the Academy of Sciences of the Czech Republic in Ondrejov and Institute of Astronomy of the Faculty of Mathematics and Physics of Charles University in Prague become new customers using G2 series of cooled, scientific CCD cameras. G2-3200 model replaced the old camera in the primary focus 65 cm reflector telescope in Ondrejov.

New camera with integrated filter wheel carrying standard photometric BVRI filter set, custom made by Institute of Plasma Physics in Turnov, provides almost the same field of view and sensitivity as the old model, but offers much better sampling, which leads to significantly enhanced resolution of the whole system.

The old camera removed from the telescope (left) is replaced with the new one (right) with integrated filter wheel

The old camera removed from the telescope (left) is replaced with the new one (right) with integrated filter wheel

The reflecting telescope was originally designed as Cassegrain system. The 65 cm primary paraboloidal mirror with 234 cm focal length is used with CCD camera in primary focus now.

G2-3200 CCD camera in primary focus of 65 cm telescope

Very fast f/3.6 mirror causes quite noticeable coma even very close to the center of the field of view. This aberration limits both the resolution and reach, because images of point sources are distorted and covers many pixels. This is why the G2-3200 camera is used in connection with Paracorr coma corrector from Tele Vue. Paracorr eliminates most of the coma aberration and shrinks the image of point sources so the image become limited more by seeing than by optical aberrations.

G2-3200 camera fitted with Paracorr PLA-2001 coma corrector

G2-3200 camera fitted with Paracorr PLA-2001 coma corrector

The telescope is used mainly for research of minor bodies in the Solar system, but also for various research projects performed by students of the Faculty of Mathematics and Physics of Charles University in Prague. Example below show observation of Wasp 2 exoplanet transit.

Wasp 2 exoplanet transit observation

Wasp 2 exoplanet transit observation

Wasp 2 exoplanet observations by Stanislav Poddany.

 
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