GREGOR: the New German Solar Telescope

Details GREGOR: the New German Solar Telescope GREGOR: the New German Solar Telescope

2007-04-20

arxiv.org/abs/0704.2693v1

Astronomy and Astrophysics

Astrophysics

in press, "Physics of Chromospheric Plasmas" (Coimbra), ASP 368, 605 (2007)

Scientific paper

GREGOR is a new open solar telescope with an aperture of 1.5m. It replaces the former 45-cm Gregory Coude 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-Perot interferometers for the visible.

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