The OTELO project is the extragalactic survey currently under way using
the tunable filters of the OSIRIS instrument at the GTC. OTELO is
already providing the deepest emission line object survey of the
universe up to a redshift 7. In this contribution, the status of the
survey and the first results obtained are presented.
OSIRIS is the optical Day One instrument, and so far the only Spanish
instrument, currently operating at the GTC. Building and testing an
instrument for a 8-10m-class telescope with non-previous commissioning
in turn, has represented a truly unique experience. In this
contribution, the current status, the last commissioning results and
some future prospects are given.
