Affiliation: | Departamento de Astronomía y Astrofísica, Universidad de Valencia, Dr Moliner 50, 46100 Burjassot (Valencia), Spain;Dipartimento di Astronomia e Scienza dello Spazio, Universita di Firenze, Firenze, Italy;Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Golm, Germany;Department of Physics, Louisiana State University, Baton Rouge, LA 70803, USA |