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Proceedings Paper

The MICADO first light imager for ELT: its astrometric performance
Author(s): J.-U. Pott; G. Rodeghiero; H. Riechert; D. Massari; M. Fabricius; C. Arcidiacono; R. I. Davies
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Paper 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).

Paper Details

Date Published: 11 July 2018
PDF: 5 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070290 (11 July 2018); doi: 10.1117/12.2312069
Show Author Affiliations
J.-U. Pott, Max-Planck-Institut für Astronomie (Germany)
G. Rodeghiero, Max-Planck-Institut für Astronomie (Germany)
H. Riechert, Max-Planck-Institut für Astronomie (Germany)
D. Massari, Univ. of Groningen (Netherlands)
M. Fabricius, Max-Planck-Institut für extraterrestrische Physik (Germany)
C. Arcidiacono, INAF - Osservatorio Astronomico di Bologna (Italy)
R. I. Davies, Max-Planck-Institut für extraterrestrische Physik (Germany)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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