J/A+AS/139/321 Stellar variability towards Galactic Bulge (Dominici+ 1999)
Stellar variability in low-extinction regions towards the galactic bulge
Dominici T.P., Horvath J.E., Medina Tanco G.A., Teixeira R.,
Benevides-Soares P.
<Astron. Astrophys. Suppl. Ser. 139, 321 (1999)>
=1999A&AS..139..321D 1999A&AS..139..321D
ADC_Keywords: Stars, variable ; Magnitudes
Keywords: Stars: variable: general - techniques: photometric - Galaxy: center
Description:
The Table "stars.dat" contains the catalogue of variable stars
discovered and/or observed for the 12 low-extinction fields towards
the galactic bulge, with the IAG/USP Meridian Circle. The first column
of the catalog indicates the star label, formed by a name that
identifies the window (see Table 1) and a sequential number that
indicates the position of the object in the corresponding database.
The following columns display successively the mean right ascension,
the mean declination, their standard deviations (in seconds and in
arcseconds, respectively) (J2000); the mean magnitude observed
(m_{Val}), the difference between the maximum and the minimum
magnitude value observed, the number of observations, a estimative for
the period, if possible, or a indication "NF" when the stars show
periodic characteristics but we aren't able to found a period, or "NC"
when the star can be aperiodic or have few observations. The next
column have the tentative classification and the last are the remarks
about the previous known variables. Finding charts will be available
upon request from the authors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 111 479 All variables
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Table 1: Coordinates of the 12 low-extinction windows for which
discovered and/or observed variable stars are presented.
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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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Note : Coordinates are from Blanco & Terndrup, 1989AJ.....98..843B 1989AJ.....98..843B
and Blanco, 1988AJ.....95.1400B 1988AJ.....95.1400B.
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Designation for the star (1)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 21 F7.4 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 37 F6.3 arcsec DEs Declination (J2000)
41- 46 F6.4 s e_RAs Standard deviation of the right ascension
49- 53 F5.3 arcsec e_DEs Standard deviation of the declination
57- 61 F5.2 mag mag Mean magnitude (2)
65- 68 F4.2 mag diff Difference between the maximum and minimum (3)
73- 74 I2 --- Nobs Number of observations
76 -77 A2 --- n_Per [NF C] Note on Per (4)
78- 83 F6.2 d Per ? Estimative for the period, if possible
to calculate
85- 95 A11 --- Class The tentative classification (5)
97-110 A14 --- Cat Catalogue information (6)
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Note (1): The designation of stars is composed by the name that represent the
low extinction window (see table 1) and a sequential number that
indicates the position of the object in the corresponding database.
Note (2): The magnitudes was measured in Valinhos filter, that is broader than
the Johnson V filter and extends from 5200 to 6800Å.
Note (3): The difference between the maximum and the minimum magnitude observed
for each star.
Note (4): NF when the stars show periodic characteristics but we aren't able
to found a period
NC when the star can be aperiodic or have few observations.
Note (5): The tentative classification based on:
a) the observed amplitude of variation;
b) the shape of light curve;
c) the expected variable classes among our data and
d) the calculated periods, whenever possible.
Note (6): This column shows the other catalogues where the star was found,
according to a search in SIMBAD database for each star.
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Acknowledgements: Tania Pereira Dominici
(End) Patricia Bauer [CDS] 06-Aug-1999