activity
20092022
most citedA geometrical height scale for sunspot penumbrae

53 citations · 433 across the 24 of their papers we have counts for

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Showing 2012Show all

6 papers · 1 filter

astro-ph.IM2012★ 8 cited

A retrospective of the GREGOR solar telescope in scientific literature

C. Denker, O. von der Lühe, A. Feller +33

In this review, we look back upon the literature, which had the GREGOR solar telescope project as its subject including science cases, telescope subsystems, and post-focus instrume…

astro-ph.IM2012★ 51 cited

The GREGOR Fabry-Pérot Interferometer

K. G. Puschmann, C. Denker, F. Kneer +18

The GREGOR Fabry-Pérot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain.…

astro-ph.SR2012★ 26 cited

The energy of waves in the photosphere and lower chromosphere: III. Inversion setup for Ca II H spectra in local thermal equilibrium

C. Beck, R. Rezaei, K. G. Puschmann

The Ca II H line is one of the strongest lines in the solar spectrum and provides continuous information on the solar atmosphere from the photosphere to the lower chromosphere. We…

astro-ph.IM2012★ 8 cited

GREGOR Fabry-Perot Interferometer - status report and prospects

Klaus G. Puschmann, Horst Balthasar, Christian Beck +6

The GREGOR Fabry-Perot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain.…

astro-ph.SR2012★ 18 cited

The energy of waves in the photosphere and lower chromosphere: II. Intensity statistics

C. Beck, R. Rezaei, K. G. Puschmann

We investigate the statistics of the intensity distributions as function of the wavelength for Ca II H and the CA II IR line at 854.2 nm to estimate the energy content. We derived…

astro-ph.IM2012★ 5 cited

The GREGOR solar telescope on Tenerife

Wolfgang Schmidt, Oskar von der Lühe, Reiner Volkmer +14

2011 was a successful year for the GREGOR project. The telescope was finally completed in May with the installation of the 1.5-meter primary mirror. The installation of the first-l…