64 citations · 123 across the 3 of their papers we have counts for
3 papers
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.SR2009★ 8 cited
High-resolution spectro-polarimetry of a flaring sunspot penumbra
J. Hirzberger, T. Riethm\" uller, A. Lagg +2
We present simultaneous photospheric and chromospheric observations of the trailing sunspot in NOAA 10904 during a weak flare eruption (GOES magnitude B7.8), obtained with the Swed…
astro-ph2008★ 64 cited
Evidence of convective rolls in a sunspot penumbra
V. Zakharov, J. Hirzberger, T. L. Riethmueller +2
aims: We study the recently discovered twisting motion of bright penumbral filaments with the aim of constraining their geometry and the associated magnetic field. methods: A large…