Olga Zamora - Univ Granada, Dept Fis Teor & Cosmos, Campus Fuentenueva, Granada, Spain
Carlos Abia - Univ Granada, Dept Fis Teor & Cosmos, Campus Fuentenueva, Granada, Spain
Inmaculada Dominguez - Univ Granada, Dept Fis Teor & Cosmos, Campus Fuentenueva, Granada, Spain
Bertrand Plez - Univ Montpellier 2, UMR 5024, GRAAL, F-34095 Montpellier 5, France