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Proceedings Paper

Lunar occultations: a relevant technique for very large telescopes?
Author(s): Bringfried Stecklum
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Paper Abstract

Apart from the limitation set by the brightness of the object to be occulted, there are two reasons for the reduced sensitivity of the method of the lunar occultations (LO) in its current implementation. First, the integration of the diffraction pattern over the aperture of the telescope suppresses high spatial frequencies. Secondly, the application of broad-band filters has the same influence due to the wavelength integration. We illustrate a method which is suited to overcome both problems simultaneously. This method (1) increases the sensitivity of LO in terms of both limiting magnitude and angular resolution, (2) is especially suited for very large telescopes in combination with modern 2D detectors, (3) enables the estimation of the brightness profiles as a function of wavelength, and (4) leads to a better resolution of close binaries of different spectral type. A comparison between the application of this novel method and the use of a single element detector is made by numerical simulation.

Paper Details

Date Published: 1 June 1994
PDF: 7 pages
Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); doi: 10.1117/12.176734
Show Author Affiliations
Bringfried Stecklum, MPG (Germany)

Published in SPIE Proceedings Vol. 2198:
Instrumentation in Astronomy VIII
David L. Crawford; Eric R. Craine, Editor(s)

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