| Affiliation: | Instituto de Astronomía, Universidad Nacional Autónomo de México, Ap. 70-264, 04510 México, DF, México;Department of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Herts AL10 9AB;Instituto de Astrofísica de Andalucía (CSIC), Aptdo. 3004, 18080 Granada, Spain;ST-ECF, Karl Schwarzschild Str. 2, 85748 Garching bei München, Germany;European Southern Observatory, Karl Schwarzschild Str. 2, D-85748 Garching bei München, Germany;INAF –Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, I-50125 Firenze, Italy |
