The MICADO first light imager for ELT: its astrometric performance

Pott, J. -U.; Rodeghiero, G.; Riechert, H.; Massari, D.; Fabricius, M.; Arcidiacono, C.; Davies, R. I.

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The MICADO first light imager for ELT: its astrometric performance

MPS-Authors

Pott, J. -U.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rodeghiero, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Riechert, H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Massari, D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fabricius, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Arcidiacono, C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Davies, R. I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018SPIE10702E..90P
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Citation

Pott, J.-.-U., Rodeghiero, G., Riechert, H., Massari, D., Fabricius, M., Arcidiacono, C., et al. (2018). The MICADO first light imager for ELT: its astrometric performance.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CBAC-5

Abstract

We report on our ongoing efforts to ensure that the MICADO NIR imager reaches differential absolute (often abbreviated: relative) astrometric performance limited by the SNR of typical observations. The exceptional 39m diameter collecting area in combination with a powerful multi- conjugate adaptive optics system (called MAORY) brings the nominal centroiding error, which scales as FWHM/SNR, down to a few 10 μas. Here we show that an exceptional effort is needed to provide a system which delivers adequate and calibrateable astrometric performance over the full field of view (up to 53 arcsec diameter).