Erratum to: A survey of hot subdwarf pulsators in ω Cen

1ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei Munchen, Germany 2Osservatorio Astronomico di Roma, Istituto Nazionale de Astrofisica, via Frascati 33, 0040 Monte Porzio Catone, Italy 3Departement de Physique, Universite de Montreal, CP. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada 4Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 5Instituto de Astrofisica de Canarias, Calle Via Lactea s/n, 38205 La Laguna, Tenerife, Spain 6Departamento de Astrofisica, Universidad de La Laguna, Tenerife, Spain 7Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium 8Departamento de Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, Av. Vicuna Mackenna 4860, 782-0436 Macul, Santiago, Chile 9The Milky Way Millennium Nucleus, Av. Vicuna Mackenna 4860, 782-0436 Macul, Santiago, Chile 10Department of Physics, Universita di Roma “Tor Vergata”, via della Ricerca Scientifica 1, 00133 Rome, Italy 11Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK 12Department of Physics, University of Warwick, Coventry CV4 7AL, UK