J/AcA/51/259 Contact binaries in OGLE-I database (Szymanski+, 2001)
Contact binaries in OGLE-I database.
Szymanski M., Kubiak M., Udalski A.
<Acta Astron., 51, 259 (2001)>
=2001AcA....51..259S 2001AcA....51..259S
ADC_Keywords: Binaries, eclipsing ; Photometry
Keywords: binaries: close - binaries: eclipsing - catalogs
Description:
The present catalog contains the most numerous, observationally
homogeneous sample of contact binaries. It is derived from the OGLE
experiment (Optical Gravitational Lensing Experiment), in the
direction of the Galactic Bulge and the Galactic bar. The observations
were made with the 1-m Swope telescope at Las Campanas Observatory in
Chile, over the period 1992 to 1995.
The present catalog includes the 1575 newly discovered contact
binaries fainter than I=18mag as well as the 1165 brighter contact
binaries previously published. It also includes a list of 506 objects
with nearly sinusoidal light curves, to ease the comparison and/or
distinction between contact binaries with the sinusoidal light curves
and pulsating stars.
Description:
The light curves are available at the OGLE site:
ftp://sirius.astrouw.edu.pl/ogle/ogle1/contact_binaries/EWa/phot/
ftp://sirius.astrouw.edu.pl/ogle/ogle1/contact_binaries/EWs/phot/
ftp://sirius.astrouw.edu.pl/ogle/ogle1/contact_binaries/P/phot/
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ew.dat 78 2740 Catalog of all contact binaries (EW) found in OGLE-I
puls.dat 64 506 Pulsating stars
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See also:
ftp://sirius.astrouw.edu.pl/ogle : OGLE Internet Archive
ftp://sirius.astrouw.edu.pl/ogle/ogle1/contact_binaries : OGLE Repository
for EW stars.
I/244 : OGLE General Catalog of Stars. I. (Szymanski+ 1996)
II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)
Byte-by-byte Description of file: ew.dat puls.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Field OGLE-I field name
9- 14 I6 --- Star Star no. in the OGLE-I database
15 A1 --- n_Star [*] Note on Star (1)
17- 18 I2 h RAh Right ascension (J2000)
19 A1 --- --- [:]
20- 21 I2 min RAm Right ascension (J2000)
22 A1 --- --- [:]
23- 27 F5.2 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
33 A1 --- --- [:]
34- 35 I2 arcmin DEm Declination (J2000)
36 A1 --- --- [:]
37- 40 F4.1 arcsec DEs Declination (J2000)
43- 47 F5.2 mag Imag Calibrated I magnitude
49- 53 F5.2 mag V-I ?=9.99 Calibrated V-I color (2)
56- 62 F7.5 d Per Period
64- 66 A3 --- Type Type classification (EWa, EWs or P) (3)
69- 78 A10 --- OName Old name (BWNN_VNNN) for contact binaries
present in the first catalog of OGLE-I
variable stars
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Note (1): Two stars survived all checks and entered the catalog twice,
with two different period values:
BW11 72188 (EWa) and BW7 66654 (EWs)
Note (2): 9.99 if no data in V available for a star; I magnitude for these
stars was calibrated with typical value of V-I=1.0.
Note (3): Classification as follows:
EWa = EWa-type binaries: contact binaries with markedly different
depths of both minima
EWs = EWs-type binaries: contact binaries for which the depth of
both minima are the same (within the error bars)
P = stars with nearly sinusoidal light curves classified as
pulsating variables (for comparison)
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History:
Copied at ftp://sirius.astrouw.edu.pl/ogle/ogle1/contact_binaries/
(End) Patricia Bauer [CDS] 19-Feb-2002