Visiting astronomer,
German-Spanish Astronomical Center, Calar Alto,
operated by the Max-Planck-Institut für Astronomie,
Heidelberg, jointly with the Spanish National Commission
for Astronomy.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.