Computer Science – Performance
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21544126n&link_type=abstract
American Astronomical Society, AAS Meeting #215, #441.26; Bulletin of the American Astronomical Society, Vol. 42, p.405
Computer Science
Performance
Scientific paper
As part of the design study of the InfraRed Imaging Spectrograph (IRIS) for Thirty Meter Telescope (TMT) we've undertaken an analysis of the effects of atmospheric dispersion at the diffraction limit of the telescope. While dispersion in the near infrared is often only marginally important in seeing limited observations, there are many effects that must be understood in order to achieve astrometric accuracies well below the 0.1 milliarcsecond level. Even with precision dispersion correction, residuals at the level of a few milliarcseconds often remain even for single stars. Field dependent distortion can further limit performance and are also dynamic in orientation and magnitude. We'll present simulations of observed stellar fields based on our expected exposure times. Effects due to stellar color, variable atmospheric conditions and other factors will also be presented.
Barton B.
IRIS Team
Larkin Jason
Moore Andrew
Niehaus Cyndie
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