Abstract
OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) is the optical Day One instrument for the GTC and the only Spanish Day One instrument. With both instrument and telescope schedules matched, OSIRIS will be available as soon as the GTC is scientifically operational. In this contribution an overview of the instrument status from a technical point of view is given, while in another contribution of this proceedings, an overview of its scientific capabilities from a user point of view is given.
