J/A+AS/136/261 Reference stars for 12 low-extinction fields (Dominici+ 1999)
Extension of Tycho catalog for low-extinction windows in the galactic bulge
Dominici T.P., Teixeira R., Horvath J.E., Medina Tanco G.A.,
Benevides-Soares P.
<Astron. Astrophys. Suppl. Ser. 136, 261 (1999)>
=1999A&AS..136..261D 1999A&AS..136..261D
ADC_Keywords: Extinction ; Stars, fundamental
Keywords: catalogues - astrometry - Galaxy: center
Description:
Table B contains the recommended reference stars for the 12
low-extinction fields towards the galactic bulge, that are the results
of a extension of Tycho catalog (Cat. I/239, ESA, 1997) for these
regions. The first column of the catalog indicates the star label,
formed by a number that designates the window (see Table 1) and a
sequential counter. The following columns contain the mean right
ascension, the corresponding standard deviation (in seconds); the mean
declination, its standard deviation (in arcseconds) (J2000); the
weighted average magnitude, its standard deviation and weighted error.
Stars belonging to the Tycho Catalogue are indicated with a "T" in the
second column. We stress that, being a natural extension of the Tycho
Catalogue, the Valinhos Reference Catalogue is not complete up to the
given magnitude in that regions, but instead constitute a reference
set which may prove useful for dedicated studies of low-extinction
fields (Dominici, 1998, MSc. Thesis IAG/USP).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb.dat 74 506 Catalog of references (Tables B1 to B12)
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: tableb.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Window Window name (4)
4- 9 A6 --- Name Designation for the star (1)
11 A1 --- Tyc [T] T if the star is catalogued in Tycho
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 25 F7.4 s RAs Right ascension (J2000)
27- 32 F6.4 s e_RAs Standard deviation of the right ascension
34 A1 --- DE- Declination sign
35- 36 I2 deg DEd Declination (J2000)
38- 39 I2 arcmin DEm Declination (J2000)
41- 46 F6.3 arcsec DEs Declination (J2000)
48- 52 F5.3 arcsec e_DEs Standard deviation of the declination
54- 59 F6.3 mag mag Magnitude (2)
61- 65 F5.3 mag e_mag Standard deviation of the magnitude
67- 72 F6.4 mag e_magw Weighted error of the magnitude (3)
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Note (1): The designation of stars is composed by a number (1- 31) that
represent the low extinction window (see table 1) and a sequential
counter.
Note (2): The magnitudes was measured in Valinhos filter, that is broader
than the Jonhson V filter and extends from 5200 to 6800 Angstrons.
Note (3): The mean magnitude was weighted with the night errors, this is
the weighted errors of the mean magnitude.
Note (4): (Table 1) Coordinates of the 12 low-extinction windows
for which secondary catalogs based on Tycho data are presented
(coordinates are from Blanco & Terndrup, 1989AJ.....98..843B 1989AJ.....98..843B
and Blanco, 1988AJ.....95.1400B 1988AJ.....95.1400B).
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Window No RA (J2000) DE GLON GLAT
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BE 5 18 10 17 -31 45 49 -6.02 0.20
BG 7 18 18 06 -32 51 24 -7.99 0.00
BJ 10 l8 40 49 -34 49 48 -13.10 0.27
LA 11 16 56 57 -52 44 53 -6.02 -24.77
LB 12 17 18 27 -48 05 40 -6.01 -18.96
LC 13 17 29 22 -45 20 05 -6.03 -15.61
LD 14 17 44 59 -40 41 37 -5.99 -10.14
LI 19 18 04 48 -33 47 46 -5.96 -2.11
LR 27 18 23 32 -26 10 16 -5.98 +6.54
LT 29 18 34 09 -21 23 35 -6.04 +9.87
LU 30 18 51 26 -13 18 41 -6.03 +21.04
LV 31 18 57 37 -10 23 35 -6.08 +24.35
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Acknowledgements: Tania Pereira Dominici
(End) Patricia Bauer [CDS] 19-Nov-1998