| Institution: | (1) Department of Physics, University La Sapienta, Rome;(2) Astronomical Institute at Utrecht, Utrecht, The Netherlands;(3) Institute for Marine and Atmospheric Research at Utrecht, Utrecht, The Netherlands;(4) Keldysh Institute of Applied Mathematics, Moscow;(5) Astronomical Institute, at Utrecht, Utrecht, The Netherlands;(6) Department of Physics of the University of Nijmegen, Nijimegen, The Netherlands;(7) Netherlands Foundation for Research in Astronomy at Dwingeloo, Dwingeloo, The Netherlands;(8) Observatory of the University at Göttingen, Göttingen, Germany;(9) Museum Boerhaave, Leiden;(10) Astronomical Institute  Anton Pannekoek at Amsterdam, Amsterdam, The Netherlands;(11) Astronomical Institute Anton Pannekoek, University of Amsterdam, Amsterdam, The Netherlands;(12) Leiden Observatory, Leiden, The Netherlands |
