Journal Article

Observing gravitational lenses from intensity fluctuations: experimental validation of the technique

Ermanno F. Borra

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 411, issue 3, pages 1695-1700
Published in print March 2011 | ISSN: 0035-8711
Published online February 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17798.x
Observing gravitational lenses from intensity fluctuations: experimental validation of the technique

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It has been proposed to study gravitational lenses from measurements of the spectrum of the fluctuations of the output current of a quadratic detector. The spatial correlation coefficient of the source is the fundamental parameter of the technique. The experimental work discussed in this article confirms that the correlation coefficient must be evaluated at the frequencies of the spectrum of the current fluctuations. This validates a powerful yet simple technique to find unresolved gravitational lenses and to study the lensing event and the source. The validation is needed before starting the extensive theoretical and observational work that must now follow.

Keywords: gravitational lensing: strong; gravitational lensing: micro; methods: observational; techniques: interferometric

Journal Article.  4540 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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