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Proceedings Paper

Spatial filtering using pinholes at COAST
Author(s): David Saint-Jacques; John E. Baldwin; Roger C. Boysen; Christopher A. Haniff; Peter R. Lawson; John Rogers; Peter J. Warner; Donald M. A. Wilson; John S. Young
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Paper Abstract

Visibility measurements obtained with optical astronomical interferometers are corrupted by random wavefront distortions of atmospheric origin. In this paper we discus how spatial filtering using pinholes can lead to increased measured visibility, improved signal-to-noise ratio and reduced dependence on seeing fluctuations. The potential for calibrating visibility measurements without resorting to a separate calibrator target is also discussed. Results of preliminary pinhole experiments carried out with the Cambridge Optical Aperture Synthesis Telescope are presented.

Paper Details

Date Published: 24 July 1998
PDF: 12 pages
Proc. SPIE 3350, Astronomical Interferometry, (24 July 1998); doi: 10.1117/12.317143
Show Author Affiliations
David Saint-Jacques, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
John E. Baldwin, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
Roger C. Boysen, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
Christopher A. Haniff, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
Peter R. Lawson, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
John Rogers, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
Peter J. Warner, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
Donald M. A. Wilson, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)
John S. Young, Mullard Radio Astronomy Observatory/Univ. of Cambridge Cavendish Lab. (United Kingdom)


Published in SPIE Proceedings Vol. 3350:
Astronomical Interferometry
Robert D. Reasenberg, Editor(s)

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