Impact of seeing and host galaxy into the analysis of photo-polarimetric microvariability in blazars - Case study of the nearby blazars 1ES 1959+650 and HB89 2201+044M. S. Sosa, C. von Essen, I. Andruchow and S. A. CelloneA&A, 607 (2017) A49DOI: https://doi.org/10.1051/0004-6361/201629823