Polarimetry with GREGOR - An Ongoing Project

Details Polarimetry with GREGOR - An Ongoing Project Polarimetry with GREGOR - An Ongoing Project

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sunge...2....9h&link_type=abstract

Sun and Geosphere, vol.2, no. 1, p. 9-12.

Astronomy and Astrophysics

Astrophysics

Scientific paper

GREGOR is the project of a high-resolution solar telescope with an aperture of 1.5 m and an effective focal length of about 55 m. It is designed to support accurate, high sensitive spectro-polarimetry of the solar photosphere and chromosphere for studying the dynamics of the solar atmosphere and the underlying physical processes. The Astrophysical Institute Potsdam is currently developing the polarimetric unit (GPU) of GREGOR. The GPU is an integral part of the telescope and allows to calibrate polarimeters in any post-focal device, like the Tenerife Infrared Polarimeter (TIP) or the POlarimetric LIttrow Spectrometer (POLIS). The new telescope and its polarimetric equipment will allow high-precision measurements of magnetic fields and plasma motions in the solar atmosphere down to scales of 70 km on the Sun.

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