A&A Supplement Series, Vol. 125, October I 1997, 139-148
Received January 2; accepted March 25, 1997
E. Aristidi - M. Carbillet - J.-F. Lyon - C. Aime
Send offprint request: E. Aristidi
UMR 6525 Astrophysique,
Université de Nice
Sophia - Antipolis - Centre National de la Recherche Scientifique,
Parc Valrose, F-06108 Nice Cedex 2, France
We present in this paper a technique for imaging binary stars from
speckle data. This technique is based upon the computation of the
cross-correlation between the speckle frames and their square. This
may be considered as a simple, easy to implement,
complementary computation to the autocorrelation function of
Labeyrie's
technique for a rapid determination of the position angle of
binary systems. Angular separation, absolute position angle
and relative photometry of binary stars can be derived from this
technique. We show an application to the bright double star
Sge observed at the 2m Telescope Bernard Lyot.
keywords: methods: data analysis --
techniques:image processing -- techniques: interferometric --
binaries: close -- stars: imaging -- stars: individual: Sge