Effect of telescope vibrations upon high angular resolution imaging

Bibcode
2001MNRAS.322..141A
DOI
10.1046/j.1365-8711.2001.04111.x
Altarac, S.; Berlioz-Arthaud, P.; Thiébaut, E.; Foy, R.; Balega, Y. Y.; Dainty, J. C.; Fuensalida, J. J.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 322, Issue 1, pp. 141-148.

Advertised on:
3
2001
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
7
IAC number of authors
1
Citations
11
Refereed citations
9
Description
We have analysed short-exposure high-resolution images obtained on the William Herschel Telescope (WHT), Big Telescope Azimuthal (BTA) and Canada-France-Hawaii Telescope (CFHT) in order to investigate mechanical vibrations that are capable of reducing the high angular resolution allowed by speckle-interferometric methods. After filtering the photon noise we have computed power spectra of the image centres of gravity. In these spectra we have found vibration features that differ from one telescope to another and that vary in particular with the zenith angle. In the case of the WHT we discuss these results in terms of possible causes and in terms of degradation of the transfer function. We present some means to improve the data.
Type
Refereed
Atmospheric effects
Instrumentation
Methods
Techniques
Telescopes

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