| Issue |
A&A
Volume 376, Number 1, September II 2001
|
|
|---|---|---|
| Page(s) | 325 - 332 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361:20010928 | |
| Published online | 15 September 2001 | |
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, rapaport@observ.u-bordeaux.fr
Received:
28
May
2001
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
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