J/A+A/439/559 OGLE eclipsing binaries (bulge+lmc+smc) (Groenewegen+, 2005)
Eclipsing binaries in the Galactic Bulge: candidates for distance estimates.
Groenewegen M.A.T.
<Astron. Astrophys. 439, 559 (2005)>
=2005A&A...439..559G 2005A&A...439..559G
ADC_Keywords: Magellanic Clouds ; Binaries, eclipsing ; Stars, carbon
Keywords: stars: distances - binaries: eclipsing - Galaxy: center
Abstract:
The 222000 I-band light curves of variable stars detected by the
OGLE-II survey (ftp://bulge.princeton.edu/ogle/ogle2/bulge_dia_variables)
in the direction of the Galactic Bulge have been searched for
eclipsing binaries (EBs). A previously developed code to analyze
lightcurve shapes and identify long period variables (LPVs) has been
adapted to identify EBs. The parameters in the modified code have been
optimised to recover a list of about 140 detached EBs in the Small
Magellanic Cloud previously identified in the literature as
particularly well suited for distance estimates (and which have
periods more than 0.85 days). The power of the code is demonstrated by
identifying 16 and 178 previously uncatalogued EBs in the SMC and LMC,
respectively. Among the 222 000 variable stars in the direction of the
Galactic Bulge 3053 EBs have been identified. Periods and phased
lightcurves are presented.
Description:
Two files are available electronically, both listing identification,
orbital period and the Julian Date that defines phase zero in Figures
1 and B1, for the sample of EBs the direction of the Galactic Bulge
(Table 2), and the newly found EBs in the direction of the Magellanic
Clouds (Table B1).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 58 3053 Eclipsing binaries in the direction of the Bulge
tableb1.dat 50 194 Newly discovered EBs in the direction of the MCs
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See also:
J/AJ/121/254 : Eclipsing Binaries in OGLE (Rucinski+, 2001)
J/AcA/53/1 : OGLE eclipsing binaries in LMC (Wyrzykowski+, 2003)
J/AcA/52/129 : DIA OGLE2 candidate variable stars catalog (Wozniak+ 2002)
ftp://bulge.princeton.edu/ogle/ogle2/bulge_dia_variables : OGLE II DIA database
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name OGLE designation (BUL-SCNN NNNN) (1)
15- 16 I2 h RAh Right ascension (J2000) (2)
18- 19 I2 min RAm Right ascension (J2000) (2)
21- 25 F5.2 s RAs Right ascension (J2000) (2)
28 A1 --- DE- Declination sign (J2000) (2)
29- 30 I2 deg DEd Declination sign (J2000) (2)
32- 33 I2 arcmin DEm Declination (J2000) (2)
35- 38 F4.1 arcsec DEs Declination (J2000) (2)
41- 50 F10.6 d Per Orbial period
52- 58 F7.3 d T0-2450000 Julian Date that defines phase zero (2450000+)
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Note (1): Simbad designation: OGLEII DIA BUL-SCNN NNNN,
from Wozniak et al., 2002, Cat. J/AcA/52/129
Note (2): Positions from Wozniak et al., 2002, Cat. J/AcA/52/129,
added by the CDS
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Field Field name (smc_scNN or lmc_scNN)
10- 13 A4 --- --- [OGLE]
14- 31 A18 --- OGLE OGLE designation (HHMMSS.ss+DDMMSS.s)(J2000)(1)
33- 42 F10.6 d Per Orbial period
44- 50 F7.3 d T0-2450000 Julian Date that defines phase zero (2450000+)
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Note (1): OGLE JHHMMSS.ss+DDMMSS.s in Simbad
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Acknowledgements: M.A.T. Groenewegen, groen(at)ster.kuleuven.ac.be
(End) Patricia Vannier [CDS] 16-May-2005