/ftp/cats/aliases/G/./GBVOC



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J/A+A/534/A91    Galactic Bulge Valinhos Observatory Catalog   (Teixeira+, 2011)
The following files can be converted to FITS (extension .fit or fit.gz)
	table2.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/534/A91
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Beginning of ReadMe : J/A+A/534/A91 Galactic Bulge Valinhos Observatory Catalog (Teixeira+, 2011) ================================================================================ Proper motion and densification of the International Celestial Reference Frame in the direction of the Galactic bulge. Teixeira R., Galli P.A.B., Benevides-Soares P., Le Campion J.F., Fidencio M., Krone-Martins A., Ducourant C., Sinachopoulos D. <Astron. Astrophys. 534, A91 (2011)> =2011A&A...534A..91T ================================================================================ ADC_Keywords: Meridian observations ; Milky Way ; Stars, faint ; Proper motions ; Photometry, infrared ; Effective temperatures Keywords: Galaxy, bulge - astrometry - reference systems - dust, extinction - catalogs - proper motions Abstract: The definition, construction and realization of a reference system is one of the oldest and most fundamental tasks of astronomy. Currently, the ICRS (International Celestial Reference System), realized by the ICRF (International Celestial Reference Frame) or ICRF2, is the reference system adopted by the IAU. It is based on the very precise VLBI positions of a few hundred compact extragalactic radio sources. Despite its excellent precision, the ICRF is far from providing a reference system that is available for the entire sky and accessible to all observers. The ICRF has to be densified and extended to other wavelengths, mainly to the optical domain where the astronomical activities are more intense. For this reason, the IAU has recommended and encouraged works in this direction over the years. Many of them were developed to give sometimes good positions and proper motions, but they are very limited in magnitude, while others are extremely dense and deep in magnitude but have low accuracy, mainly for the proper motions. Nevertheless, all these contributions are very important because they are complementary. We present a homogeneous and precise optical astrometric catalog that extends the ICRF in the direction of 12 low-extinction windows of the Galactic bulge and provides at the same time a useful database for kinematic studies. Description: The Galactic Bulge Valinhos Observatory Catalog (GBVOC) contains 11619 stars brighter than V 16 magnitudes, located in the direction of 12 low extinction windows of the Galactic bulge. The catalog provides the J2000.0 positions, proper motions at the mean epoch and their errors. These astrometric parameters were measured exclusively with CCD meridian observations realized at the Abrahao de Moraes Observatory Valinhos (Brazil) with a mean internal precision of 22mas for the positions and 4mas/yr for the proper motions. The catalog also contains the V magnitudes and mean epochs of observations. Moreover, an indicative effective temperature (better than 500K) based on the 2MASS photometry is given. The JHK 2MASS magnitudes and identifier are also provided. In the last column the capital letter T indicates that the star is present in the Tycho 2 catalog.