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Proceedings Paper

Considerations about the differential piston for adaptive optics interferometry
Author(s): Bruno Femenia; Marcel Carbillet; Simone Esposito; Armando Riccardi
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Paper Abstract

This contribution extends a previous work where the concept of piston angular anisoplanatism was introduced and the issue of sky-coverage for large ground-based optical interferometers was raised. We obtain expressions for the temporal power spectra of phase fluctuations caused by differential piston and photon noise. This allows us to evaluate the residual phase variance left in a fringe tracking servo-loop system and obtain estimates for the sky- coverage due exclusively to differential piston effects, concluding that in V-band the percentage of sky that can be observed is a few percent while in K-band we should be able to cover the entire sky.

Paper Details

Date Published: 5 July 2000
PDF: 12 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390194
Show Author Affiliations
Bruno Femenia, Osservatorio Astrofisico di Arcetri (Italy)
Marcel Carbillet, Osservatorio Astrofisico di Arcetri (Italy)
Simone Esposito, Osservatorio Astrofisico di Arcetri (Italy)
Armando Riccardi, Osservatorio Astrofisico di Arcetri (Italy)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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