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Solar Research Programs at IRSOL, Switzerland
R. Ramelli, M. Bianda, J. O. Stenflo +1
The Zurich IMaging POLarimeter (ZIMPOL) developed at ETH Zurich and installed permanently at the Gregory Coude Telescope at Istituto Ricerche Solari Locarno (IRSOL) allows a polari…
Spectropolarimetry of solar prominences
R. Ramelli, M. Bianda, J. Trujillo Bueno +2
A large set of high precision full-Stokes spectropolarimetric observations of prominences in He-D3, Halpha and Hbeta lines has been recorded with the ZIMPOL polarimeter at the Greg…
Observing the Second Solar Spectrum at IRSOL
M. Bianda, R. Ramelli, D. Gisler
The history of the IRSOL observatory is closely related to Second Solar Spectrum observations. Already in 1963 Brueckner observed scattering polarization in the CaI 4227A line. In…
Observations of the Joint Action of the Hanle and Zeeman Effects in the D2 Line of BaII
R. Ramelli, M. Bianda, J. Trujillo Bueno +2
We show a selection of high-sensitivity spectropolarimetric observations obtained over the last few years in the Ba II D2-line with the Zurich Imaging Polarimeter (ZIMPOL) attached…