M2000: An astrometric catalog in the Bordeaux Carte du Ciel zone *
Observatoire de Bordeaux, CNRS UMR 5804, BP 89, 33270 Floirac, France
Corresponding author: M. Rapaport, firstname.lastname@example.org
Accepted: 26 June 2001
During four years, systematic observations have been conducted in drift scan mode with the Bordeaux automated meridian circle in the declination band . The resulting astrometric catalog includes about stars down to the magnitude limit . Nearly all stars (96% ) have been observed at least 6 times, the catalog being complete down to . The median internal standard error in position is mas in the magnitude range , which degrades to mas when the faintest stars are considered. M2000 also provides one band photometry with a median internal standard error of mag. Comparisons with the Hipparcos and bright part of Tycho-2 catalogs have enabled us to estimate external errors in position to be lower than 40 mas. In this zone and at epoch 1998, the faint part of Tycho-2 is found to have an accuracy of 116 mas in α instead of 82 mas deduced from the model-based standard errors given in the catalog.
Key words: astrometry / catalogs
© ESO, 2001