Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-04-20
Astronomy and Astrophysics
Astrophysics
10 pages, one postscript figure. Astron. Astrophys., 1999, accepted
Scientific paper
A description is given of the activities of an international working group created with the aim of obtaining both photometric and astrometric observations of visual double and multiple stars with angular separations in the range of one to fifteen arcseconds, that formed part of the HIPPARCOS Input Catalogue. The scientific aims and realisations of this European network are given. About 50 observational missions have been carried out in both hemispheres according to a pre-defined protocol. We describe the general and specifically designed methods used for the reduction of large amounts of CCD observations of double stars and give an outline of the results already presented and soon expected.
Chareton M.
Cuypers Jan
Duval Dominique
Halbwachs Jean-Louis
Lampens Patricia
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