The MICADO first light imager for ELT: its astrometric performance

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

The MICADO first light imager for ELT: its astrometric performance

Instrumentation and Methods for Astrophysics 2018-07-20 v1

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

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 uas. 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).

Keywords

astronomical instrumentation and telescopes solar instrument calibration

Cite

@article{arxiv.1807.07402,
  title  = {The MICADO first light imager for ELT: its astrometric performance},
  author = {J. -U. Pott and G. Rodeghiero and H. Riechert and D. Massari and M. Fabricius and C. Arcidiacono and R. I. Davies},
  journal= {arXiv preprint arXiv:1807.07402},
  year   = {2018}
}

Comments

5 pages, submitted to SPIE 2018 Astronomical Telescopes + Instrumentation

The MICADO first light imager for ELT: its astrometric performance

Abstract

Keywords

Cite

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