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Proceedings Paper

Results from a pinhole spatial filtering system at COAST
Author(s): James Keen; Peter J. Warner; David F. Buscher; Donald M. A. Wilson; John S. Young
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Paper Abstract

We present details of the design and construction of a new pinhole Spatial Filtering system at the Cambridge Optical Aperture Synthesis Telescope and show the results from the first astronomical observations with the system. We discuss the advantages of using such a system to reduce uncertainties in visibility observations with an optical/IR interferometer. We compare simultaneous observations with and without the system and show the potential to improve both the quality and quantity of scientific output of an interferometer. We also show that filtered observations are much more robust to changes in atmospheric seeing than unfiltered observations, improving the accuracy of calibrated visibility measurements while reducing the need for repeated calibration. Given the simplicity and high throughput of pinhole spatial filters we suggest that they could be a valuable addition to many current and future arrays.

Paper Details

Date Published: 21 February 2003
PDF: 7 pages
Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); doi: 10.1117/12.457153
Show Author Affiliations
James Keen, Cavendish Lab./Univ. of Cambridge (United Kingdom)
Peter J. Warner, Cavendish Lab./Univ. of Cambridge (United Kingdom)
David F. Buscher, Cavendish Lab./Univ. of Cambridge (United Kingdom)
Donald M. A. Wilson, Cavendish Lab./Univ. of Cambridge (United Kingdom)
John S. Young, Cavendish Lab./Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 4838:
Interferometry for Optical Astronomy II
Wesley A. Traub, Editor(s)

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