The Hipparcos catalog

Astrometric Control of the Inertiality of the Hipparcos Catalog

Spectroscopic Survey of G and K Dwarfs in the Hipparcos Catalog. I. Comparison between the Hipparcos and Photometric Parallaxes

The tension between the Hipparcos parallax of the Pleiades and other independent distance estimates continues even after the new reduction of the Hipparcos astrometric data and the development of a new geometric distance measurement for the cluster. A short Pleiades distance from the Hipparcos parallax predicts a number of stars in the solar neighborhood that are sub-luminous at a given photosp...

The Hipparcos mission: photometric data

An overview of the Hipparcos and Tycho photometric data is presented, with reference to the main aspects of the data reductions and the overall quality and quantity of the results. The data have been presented in three forms: as mean values in the astrometric catalogues, as epoch photometry, and as interpreted results of the variability analysis, which is also briefly described.

Comparison of the first results from the Hipparcos star mappers with the Hipparcos Input Catalogue

Preliminary positions and magnitudes derived from the analysis of 12 weeks of observations from the Hipparcos star mappers are systematically compared with the various sources of ground-based data used in the Hipparcos Input Catalogue. These comparisons allow to cross-check the accuracies claimed by the various sources of ground-based data and by the analysis method of star mapper data. The par...

Teaching the Radical Catalog

During a recent information literacy session for a group of first-year students enrolled in an African-American women's history course at Sarah Lawrence College, I discussed the changing Library of Congress (LC) subject headings for this field: NEGRO WOMEN; BLACK WOMEN; AFRICAN-AMERICAN WOMEN; etc. A student raised her hand and asked whether students specifically interested in the history of Wh...