Validation of the new Hipparcos reduction

  title={Validation of the new Hipparcos reduction},
  author={F. X. Rolaf van Leeuwen},
Context. A new reduction of the astrometric data as produced by the Hipparcos mission has been published, claiming accuracies for nearly all stars brighter than magnitude Hp = 8 to be better, by up to a factor 4, than in the original catalogue. Aims. The new Hipparcos astrometric catalogue is checked for the quality of the data and the consistency of the formal errors as well as the possible presence of error correlations. The differences with the earlier publication are explained. Methods. The… CONTINUE READING
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