Mining in the Hipparcos raw data^*

Observatoire de la Côte d'Azur, CERGA, UMR CNRS 6527, Av. N. Copernic, F-06130 Grasse, France

Send offprint request to: F. Mignard

Received: 1 September 1998
Accepted: 21 October 1998

Abstract

The Hipparcos solutions flagged as unreliable after the completion of the standard data processing have been systematically revisited in the light of additional information, primarily related to their multiplicity. In many cases improved solutions have been obtained, yielding at the same time an Hipparcos based separation and position angle and a better astrometric solution for the system. The principles applied in this reprocessing are explained and more than a hundred new solutions with absolute and relative astrometry are presented and discussed.