Correcting the effect of magnetic tongues on the tilt angle of bipolar active regions M. Poisson, M. C. López Fuentes, C. H. Mandrini, P. Démoulin and C. MacCormack A&A, 633 (2020) A151 Published online: 24 January 2020 DOI: 10.1051/0004-6361/201936924