¹ University of Ljubljana, Faculty of Mathematics and Physics, Ljubljana, Slovenia
² Astrophysikalisches Institut Potsdam, Potsdam, Germany
³ Observatoire de Strasbourg, Strasbourg, France
⁴ INAF, Osservatorio Astronomico di Padova, Sede di Asiago, Italy
⁵ RSAA, Australian National University, Canberra, Australia
⁶ Anglo Australian Observatory, Sydney, Australia
⁷ Johns Hopkins University, Baltimore, MD, USA
⁸ Macquarie University, Sydney, Australia
⁹ Institute of Astronomy, University of Cambridge, UK
¹⁰ e2v Centre for Electronic Imaging, School of Engineering and Design, Brunel University, Uxbridge, UK
¹¹ Astronomisches Rechen-Institut, Center for Astronomy of the University of Heidelberg, Heidelberg, Germany
¹² Kapteyn Astronomical Institute, University of Groningen, Groningen, The Netherlands
¹³ University of Victoria, Victoria, Canada
¹⁴ Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Australia
¹⁵ Rudolf Pierls Center for Theoretical Physics, University of Oxford, UK
¹⁶ Institute of Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
¹⁷ Sterrewacht Leiden, University of Leiden, Leiden, The Netherlands
¹⁸ University of Leicester, Leicester, UK
¹⁹ MPI für extraterrestrische Physik, Garching, Germany
²⁰ University of Central Lancashire, Preston, UK
²¹ University of Rochester, Rochester NY, USA
²² University of Edinburgh, Edinburgh, UK
²³ Deceased.