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Proceedings Paper

High-precision calibration of interferometric data through the removal of fixed-pattern residuals
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Paper Abstract

We demonstrate a new calibration technique that can be applied to multi-spectral interferometric observations. The technique measures a fixed-pattern in squared visibility measurements across the spectral channels of each baseline. Because the fixed-pattern appears to be stable on time scales longer than one night, nightly or weekly averages can be calculated based on observations of calibrator stars. The averaged fixed-pattern values can then be removed from data of target stars. We demonstrate the performance of the calibration technique on actual observations obtained with the Navy Prototype Optical Interferometer and show that the fixed-pattern effects can be suppressed by up to an order of magnitude.

Paper Details

Date Published: 29 June 2006
PDF: 10 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 626849 (29 June 2006); doi: 10.1117/12.672043
Show Author Affiliations
Christopher Tycner, U.S. Naval Observatory, Flagstaff Station (United States)
NVI, Inc. (United States)
J. A. Benson, U.S. Naval Observatory, Flagstaff Station (United States)
D. J. Hutter, U.S. Naval Observatory, Flagstaff Station (United States)
H. R. Schmitt, Naval Research Lab. (United States)
R. T. Zavala, U.S. Naval Observatory, Flagstaff Station (United States)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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