SIMBAD references

Making use of the technique of probability imaging, intensity ratios and relative positions of components are obtained for six double stars (ζ Aqr, γ Vir, ζ Ori, Gl 473, Gl 804 and Gl 866), from one-dimensional near-infrared speckle data obtained with a slit-scanning specklegraph. The two-fold probability density function (PDF) is used to reconstruct the binary system. The data reduction is made with a parametric approach, by minimizing a distance between observed two-fold PDFs and modelled ones, obtained by using a nearby reference star. In order to reduce the noise effects, weighting functions are applied to the PDFs prior to the distance measurements. Several distances have been used (Euclidean, Kolmogorov, Jeffreys-Matusita, χ², Kullback-Leibler) and have given consistent results.