Observations of scattering polarization of the Ca I 4227 Å line with ZIMPOL at Gregor and IRSOL

<p>This dataset contains spectropolarimetric measurements obtained in the 4227A Ca line near the solar limb with the GREGOR telescope in Tenerife and with the Gregory Coud&eacute; Telescope at IRSOL in Locarno. The observations are discussed in the article</p> <p>Capozzi, E., Alsina Ballester, E, Belluzzi, L., Bianda, M., Dhara, S.K., Ramelli, R.: 2020, &quot;Observational indications of magneto-optical effects in the scattering polarization wings of the Ca I 4227 A line&quot;, Astronomy and Astrophysics, 641, A63, doi:10.1051/0004-6361/202038455, <a href="https://arxiv.org/abs/2006.13653">arXiv:2006.13653</a></p> <p>&nbsp;</p>