Sotomayor-Beltran, C., Sobey, C., Hessels, J., de Bruyn, G., Noutsos, A., Alexov, A., et al. (2015). Calibrating high-precision Faraday rotation measurements for LOFAR and the next generation of low-frequency radio telescopes (Corrigendum). Astronomy and Astrophysics, 581: C4, pp. C4. doi:10.1051/0004-6361/201220728e.