| Affiliation: |
| AA(Kapteyn Astronomical Institute, University of Groningen, Netherlands.), AB(Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Capodimonte, 80131 Naples, Italy.), AC(Kapteyn Astronomical Institute, University of Groningen, Netherlands.; Departamento de Física, Universidad de Concepción, Casilla 160-C, Concepción, Chile.; School of Physics and Astronomy, University of Nottingham, UK.), AD(Kapteyn Astronomical Institute, University of Groningen, Netherlands.), AE(Kapteyn Astronomical Institute, University of Groningen, Netherlands.; University of Leiden, Netherlands.), AF(School of Physics and Astronomy, University of Nottingham, UK.), AG(European Southern Observatory, D-85748 Garching, Germany.; Istituto Nazionale di Astrofisica, Observatory of Turin, 10025 Pino Torinese, Italy.), AH(Max-Planck-Institut für extraterrestrische Physik, D-85748 Garching, Germany.), AI(Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australia.), AJ(School of Physics and Astronomy, University of Nottingham, UK.), AK(School of Physics and Astronomy, University of Nottingham, UK.), AL(Dipartimento di Fisica, Università ``Federico II,'' Naples, Italy.) |