Magnetic characterization and variability study of the magnetic SPB star o Lupi B. Buysschaert, C. Neiner, A. J. Martin, M. E. Oksala, C. Aerts, A. Tkachenko, E. Alecian and the MiMeS Collaboration A&A, 622 (2019) A67 Published online: 30 January 2019 DOI: 10.1051/0004-6361/201731913