Thirty Meter Telescope astrometry error budget

Matthias Schöck; Tuan Do; Brent L. Ellerbroek; Luc Gilles; Glen Herriot; Leo Meyer; Ryuji Suzuki; Lianqi Wang; Sylvana Yelda

doi:10.1117/12.2057089

21 July 2014 Thirty Meter Telescope astrometry error budget

Matthias Schöck, Tuan Do, Brent L. Ellerbroek, Luc Gilles, Glen Herriot, Leo Meyer, Ryuji Suzuki, Lianqi Wang, Sylvana Yelda

Author Affiliations +

Proceedings Volume 9148, Adaptive Optics Systems IV; 91482L (2014) https://doi.org/10.1117/12.2057089
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The Thirty Meter Telescope (TMT) with its first-light multi-conjugate adaptive optics system, NFIRAOS, and high-resolution imager, IRIS, is expected to take differential astrometric measurements with an accuracy on the order of tens of micro arcsec. This requires the control, correction, characterization and calibration of a large number of error sources and uncertainties, many of which have magnitudes much in excess of this level of accuracy. In addition to designing the observatory such that very high precision and accuracy astrometric observations are enabled, satisfying the TMT requirements can only be achieved by a careful calibration, observation and data reduction strategy. In this paper, we present descriptions of the individual errors sources, how and when they apply to different astrometry science cases and the mitigation methods required for each of them, as well as example results for individual error terms and the overall error budgets for a variety of different science cases.

Citation Download Citation

Matthias Schöck, Tuan Do, Brent L. Ellerbroek, Luc Gilles, Glen Herriot, Leo Meyer, Ryuji Suzuki, Lianqi Wang, and Sylvana Yelda "Thirty Meter Telescope astrometry error budget", Proc. SPIE 9148, Adaptive Optics Systems IV, 91482L (21 July 2014); https://doi.org/10.1117/12.2057089

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