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Paper: GREGOR: the New German Solar Telescope
Volume: 368, The Physics of Chromospheric Plasmas
Page: 605
Authors: Balthasar, H.; von der Luehe, O.; Kneer, F.; Staude, J.; Volkmer,R.; Berkefeld, T.; Caligari, P.; Collados, M.; Halbgewachs, C.; Heidecke,F.; Hofmann, A.; Klvana, M.; Nicklas, H.; Popow, E.; Puschmann,K.; Schmidt, W.; Sobotka, M.; Soltau, D.; Strassmeier, K.; Wittmann, A.
Abstract: GREGOR is a new open solar telescope with an aperture of 1.5 m. It replaces the former 45-cm Gregory Coud́e telescope on the Canary island Tenerife. The optical concept is that of a double Gregory system. The main and the elliptical mirrors are made from a silicon-carbide material with high thermal conductivity. This is important to keep the mirrors on the ambient temperature avoiding local turbulence. GREGOR will be equipped with an adaptive optics system. The new telescope will be ready for operation in 2008. Post-focus instruments in the first stage will be a spectrograph for polarimetry in the near infrared and a 2-dimensional spectrometer based on Fabry-Ṕerot interferometers for the visible.
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