M2000: An astrometric catalog in the Bordeaux Carte du Ciel zone $\mathsf{+11\degr \leq \delta \leq +18\degr}$

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Abstract
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.
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