Abstract
The GTC (Gran Telescopio Canarias) is an optical/IR telescope, with a 10,4 meter segmented primary, installed at the Observatorio del Roque de Los Muchachos (ORM), at La Palma. Past July 2007 it saw its First Light showing a very promising behaviour. The very good image quality achieved at that an early stage of telescope commissioning is a direct consequence of the quality of its optics, the high performances of its primary mirror control system, and the highly engineered telescope structure and servo system. At present, we are advancing with the telescope commissioning whose first results are presented here. The two Day One science instruments: OSIRIS and CanariCam are being prepared for installation and commissioning on the telescope. Science verification are planned to be initiated by the end of 2008 and regular operation by March 2009.
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