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 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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 128 11619 Galactic Bulge Valinhos Observatory Catalog, GBVOC
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+AS/136/261 : Reference stars for 12 low-extinction fields (Dominici+ 1999)
J/A+AS/139/321 : Stellar variability towards Galactic Bulge (Dominici+ 1999)
J/A+A/517/A44 : Spitzer sources in the Galactic bulge (Uttenthaler+, 2010)
J/ApJS/194/18 : The Galactic Bulge Survey: X-ray observations (Jonker+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- win Local identifier of the low extinction window as
in Dominici et al., 1999, Cat. J/A+AS/136/261
4- 5 I2 h RAh Right Ascension J2000, at mean epoch EpRA
7- 8 I2 min RAm Right Ascension J2000, at mean epoch EpRA
10- 16 F7.4 s RAs Right Ascension J2000, at mean epoch EpRA
18 A1 --- DE- Declination J2000, at mean epoch EpDE
19- 20 I2 deg DEd Declination J2000, at mean epoch epDE
22- 23 I2 arcmin DEm Declination J2000, at mean epoch EpDE
25- 30 F6.3 arcsec DEs Declination J2000, at mean epoch EpDE
32- 36 F5.1 mas e_RAs Error on RA at mean epoch (EpRA)
38- 41 F4.1 mas e_DEs Error on DE at mean epoch (EpDE)
43- 48 F6.1 mas/yr pmRA Proper motion in RA*cosDE
50- 55 F6.1 mas/yr pmDE Proper motion in DE
57- 60 F4.1 mas/yr e_pmRA Error on pmRA
62- 65 F4.1 mas/yr e_pmDE Error on pmDE
67- 70 F4.1 mag Vmag Valinhos merdian magnitude
72- 74 F3.1 mag e_Vmag Error on Vmag
76- 81 F6.1 yr EpRA Observational mean epoch in RA
83- 88 F6.1 yr EpDE Observational mean epoch in DE
90- 93 F4.1 mag Jmag ? 2MASS J magnitude
95- 98 F4.1 mag Hmag ? 2MASS H magnitude
100-103 F4.1 mag Kmag ? 2MASS K magnitude
105-109 I5 K Teff ? Effective Temperature
111-126 A16 --- 2MASS 2MASS (II/246) identifier
128 A1 --- TYC [T] Flag of presence in Tycho 2 (I/259) catalog
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Acknowledgements:
Rama Teixeira, teixeira(at)astro.iag.usp.br
(End) Patricia Vannier [CDS] 06-Oct-2011