The instrumentation plan for the ELT foresees the ArmazoNes high Dispersion Echelle Spectrograph (ANDES). The ANDES-project and consortium entered phase B in January 2022 and underwent several (internal and external) revisions by now to ensure that the requirements and eventually the challenging goals can be met by the physical design of the spectrograph.
Among its main scientific goals are the detection of atmospheres of exoplanets and the determination of fundamental physical constants. For this, high radial velocity precision and accuracy are required. Even though the ANDES-spectrograph is designed for maximum intrinsic stability, a calibration and thus a calibration unit is mandatory. To allow for maximum flexibility and modularity the calibration unit is physically split into three calibration units.
We show the design of the calibration units and their individual components, where possible. This includes the electronics, the mechanics, the software supporting and controlling the light guiding and calibration sources.
The calibration units of today's instruments are often limited by the fact that a reference source can feed one or even two outputs without having much loss. As a result, there is often a trade-off between throughput and system size to be made. We have designed a novel Light Distribution System based on pneumatic actuators that allows a defined number of sources to be selected and several outputs to be fed at the same time.
SPIP is a new instrument for the 2m Télescope Bernard Lyot (TBL) at Pic du Midi, located in the French Pyrénées. Observing in the 0.95-2.5 μm range (YJHK bands), SPIP at TBL will team with SPIRou at the 3.6m CFHT (Maunakea, Hawaii), aiming together at detecting and characterizing planetary worlds around nearby red dwarfs, and at documenting magnetized star / planet formation. This paper describes the instrument sub-systems integration and validation tests performed in Toulouse (France) with a particular focus on the H4RG detector, failure analysis and mitigation.
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