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Proceedings Paper

The effects of atmospheric calibration errors on source model parameters
Author(s): Christopher Tycner; D. J. Hutter; R. T. Zavala
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Paper Abstract

Optical long-baseline interferometric data is commonly calibrated with respect to an external calibrator, which is either an unresolved source or a star with a known angular diameter. A typical observational strategy involves acquiring data in a sequence of calibrator-target pairs, where the observation of each source is obtained separately. Therefore, the atmospheric variations that have time scales shorter than the cadence between the target-calibrator pairs are not always fully removed from the data even after calibration. This results in calibrated observations of a target star that contain unknown quantities of residual atmospheric variations. We describe how Monte Carlo simulations can be used to assess quantitatively the impact of atmospheric variations on fitted model parameters, such as angular diameters of uniform-disk models representing semi- and fully-resolved single stars.

Paper Details

Date Published: 21 July 2010
PDF: 10 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 773439 (21 July 2010); doi: 10.1117/12.857345
Show Author Affiliations
Christopher Tycner, Central Michigan Univ. (United States)
D. J. Hutter, U. S. Naval Observatory (United States)
R. T. Zavala, U. S. Naval Observatory (United States)

Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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