Polarimetry with the GREGOR Fabry-Pérot Interferometer Balthasar, H. ; Gisler, D. ; González Manrique, S. J. ; Kuckein, C. ; Verma, M. ; Denker, C. Abstract Publication: Proceedings of the 9th Solar Polarization Workshop SPW9 Pub Date: August 2019 DOI: 10.17617/2.3194860 Bibcode: 2019spw..confE...3B