Spatial filtering using pinholes at COAST

Details Spatial filtering using pinholes at COAST Spatial filtering using pinholes at COAST

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3350..762s&link_type=abstract

Proc. SPIE Vol. 3350, p. 762-773, Astronomical Interferometry, Robert D. Reasenberg; Ed.

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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