Broadband radio spectro-polarimetric observations of high-Faraday-rotation-measure AGNAlice Pasetto, Carlos Carrasco-González, Shane O’Sullivan, Aritra Basu, Gabriele Bruni, Alex Kraus, Salvador Curiel and Karl-Heinz MackA&A, 613 (2018) A74DOI: https://doi.org/10.1051/0004-6361/201731804