J/AcA/66/421 Eclipsing binaries in the Magellanic System (Pawlak+, 2016)
The OGLE collection of variable stars.
Eclipsing binaries in the Magellanic System.
Pawlak M., Soszynski I., Udalski A., Szymanski M.K., Wyrzykowski L.,
Ulaczyk K., Poleski R., Pietrukowicz P., Kozlowski S., Skowron D.M.,
Skowron J., Mroz P., Hamanowicz A.
<Acta Astron., 66, 421-432 (2016)>
=2016AcA....66..421P 2016AcA....66..421P (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Binaries, eclipsing ; Photometry
Keywords: binaries: eclipsing - stars: variables: general - Magellanic Clouds
Abstract:
We present the collection of eclipsing binaries in the Large and Small
Magellanic Clouds, based on the OGLE survey. It contains 48605
systems, 40204 belonging to the LMC and 8401 to the SMC. Out of the
total number of presented here binaries, 16374 are the new
discoveries. We present the time-series photometry obtained for the
selected objects during the fourth phase of the OGLE project. The
catalog has been created using a two step machine learning procedure
based on the Random Forest algorithm.
Description:
All the data used in this work were collected during the fourth phase
of the OGLE project, between March 2010 and July 2015, using the 1.3-m
Warsaw telescope located at Las Campanas Observatory (operated by the
Carnegie Institution for Science) in Chile. The telescope is equipped
with a 32-chip mosaic camera, with a total field of view of 1.4 square
degrees. The whole area of the Magellanic Clouds region covered by 475
OGLE-IV fields is about 650 square degrees. Observations were carried
out in the I- and V-band filters, with about 90%taken in the I-band.
The I-band magnitude range covered by OGLE-IV is from 13mag to
21.5mag. The number of collected epochs varies between 100 and 700.
The photometry was obtained with the Differential Image Analysis
method (Alard and Lupton, 1998ApJ...503..325A 1998ApJ...503..325A, Wozniak,
2000AcA....50..421W 2000AcA....50..421W, Cat. J/AcA/50/421). For technical details of the
OGLE-IV instrumental setup and date reduction system we refer the
reader to Udalski et al. (2015AcA....65....1U 2015AcA....65....1U). The procedure of the
correction of photometric uncertainties is presented in Skowron et al.
(2016AcA....66....1S 2016AcA....66....1S)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ident.dat 118 48605 Identification of stars (8401 SMC and 40204 LMC)
ecl.dat 70 48605 Parameters of stars
remarks.dat 80 21 Remarks
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See also:
J/MNRAS/443/432 : Eclipsing binaries in LMC (Muraveva+, 2014)
J/ApJ/824/74 : OGLE LC classification of MC Cepheids (Garcia-Varela+, 2016)
Byte-by-byte Description of file: ident.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Star Star's ID
(OGLE-SMC-ECL-NNNN or OGLE-LMC-ECL-NNNNN)
21- 23 A3 --- Type [C NC ELL] Subtype of binary star (1)
26- 27 I2 h RAh Right ascension (J2000.0)
29- 30 I2 min RAm Right ascension (J2000.0)
32- 36 F5.2 s RAs Right ascension (J2000.0)
38 A1 --- DE- Declination sign (J2000.0)
39- 40 I2 deg DEd Declination (J2000.0)
42- 43 I2 arcmin DEm Declination (J2000.0)
45- 48 F4.1 arcsec DEs Declination (J2000.0)
51- 66 A16 --- OGLEIV OGLE-IV ID
68- 82 A15 --- OGLEIII OGLE-III ID
84- 98 A15 --- OGLEII OGLE-II ID
100-118 A19 --- OName Other designation (from GCVS)
-------------------------------------------------------------------------------
Note (1): Subtypes as follows:
C = contact
NC = detached or semi-detached
ELL = ellipsoidal
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Byte-by-byte Description of file: ecl.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Star Star's ID
(OGLE-SMC-ECL-NNNN or OGLE-LMC-ECL-NNNNN)
21- 26 F6.3 mag <Imag> Intensity mean I-band magnitude
28- 33 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
35- 46 F12.7 d Per Period
49- 57 F9.4 d T0 Epoch of primary eclipse (HJD-2450000)
60- 64 F5.3 mag Depth ?=- Depth of primary eclipse
66- 70 F5.3 mag Depth2 ?=- Depth of secondary eclipse
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Byte-by-byte Description of file: remarks.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Star Star's ID
(OGLE-SMC-ECL-NNNNN or OGLE-LMC-ECL-NNNNN)
20- 80 A61 --- Rem Remarks
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History:
Copied at ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/lmc/ecl/
and ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/smc/ecl/
(End) Patricia Vannier [CDS] 22-Oct-2018