Bibcode
Oblak, E.; Lampens, P.; Cuypers, J.; Halbwachs, J. L.; Martín, E.; Seggewiss, W.; Sinachopoulos, D.; van Dessel, E. L.; Chareton, M.; Duval, D.
Referencia bibliográfica
Astronomy and Astrophysics, v.346, p.523-531 (1999)
Fecha de publicación:
6
1999
Revista
Número de citas
7
Número de citas referidas
6
Descripción
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 to be
expected. Based on observations made at La Silla (ESO, Chile - Key
Programme 7-009-49 K), Observatoire de Haute-Provence (OHP), Calar Alto
(CLA), La Palma (LPL) and Jungfraujoch (JFJ) Observatories}