Abstract
MAORY (Multi-conjugate Adaptive Optics RelaY) is one of the first light instruments for the ESO Extremely Large Telescope (ELT). It will be firstly used by MICADO (Multi-AO Imaging CamerA for Deep Observations), a near-infrared high-angular resolution imager, to compensate aberrations and provide highStrehl images within a 53”×53” Field of View (FoV). The complexity of MAORY requires calibration functionalities for both the AIV (Assembly-Integration-Verification) and the operational phase. The Calibration Unit (CU), providing suitable light sources, both Natural Guide Stars (NGS) and Laser Guide Stars (LGS), will enable MAORY to run calibration templates as well as verification and test procedures, in standalone mode, drastically reducing the amount of required night-time for such operations. An overview of the instrument, the current status of the design and the main challenges to face in the future are here presented.
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