The Westerbork Hydrogen Accretion in LOcal GAlaxieS (HALOGAS) survey (Corrigendum) - I. Survey description and pilot observationsG. Heald, G. Józsa, P. Serra, L. Zschaechner, R. Rand, F. Fraternali, T. Oosterloo, R. Walterbos, E. Jütte and G. GentileA&A, 544 (2012) C1DOI: https://doi.org/10.1051/0004-6361/201015938e