Institution: | Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen, the Netherlands;Max-Planck Institute for Astrophysics, Karl-Schwarzschild-Straße 1, 85748 Garching, Germany;Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands;ASTRON, Postbus 2, 7990 AA Dwingeloo, the Netherlands;Stockholm Observatory, AlbaNova University Center, Stockholm University, SE-106 91, Stockholm, Sweden |