J/MNRAS/470/539 The MOA-II eclipsing binary catalogue (Li+, 2017)
The first eclipsing binary catalogue from the MOA-II data base.
Li M.C.A., Rattenbury N.J., Bond I.A., Sumi T., Bennett D.P., Koshimoto N.,
Abe F., Asakura Y., Barry R., Bhattacharya A., Donachie M., Evans P.,
Freeman M., Fukui A., Hirao Y., Itow Y., Ling C.H., Masuda K.,
Matsubara Y., Muraki Y., Nagakane M., Ohnishi K., Saito T., Sharan A.,
Sullivan D.J., Suzuki D., Tristram P.J., Yonehara A.
<Mon. Not. R. Astron. Soc., 470, 539-550 (2017)>
=2017MNRAS.470..539L 2017MNRAS.470..539L (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Positional data
Keywords: methods: data analysis, catalogues - binaries: eclipsing
Abstract:
We present the first catalogue of eclipsing binaries in two MOA
(Microlensing Observations in Astrophysics) fields towards the
Galactic bulge, GB9 and GB10, in which over 8000 candidates, mostly
contact and semidetached binaries of periods <1d, were identified. In
this paper, the light curves of a small number of interesting
candidates, including eccentric binaries, binaries with noteworthy
phase modulations and eclipsing RS Canum Venaticorum type stars, are
shown as examples. In addition, we identified three triple object
candidates by detecting the light-travel-time effect in their eclipse
time variation curves.
Description:
Two tables containing information, including periods and positions, on
5253 and 3480 eclipsing binary (EB) candidates in the GB9 and GB10
fields, respectively, are presented. The photometric light curves,
with outliers being rejected, of these 8733 EB candidates over two MOA
observational season from February 2013 to August 2014 are in
subdirectory lc.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 107 3 Doubly EBs in the GB10 field
table3.dat 96 40 *Interesting EB candidates
table4.dat 142 3 *Orbital elements from the LTTE solutions for
three selected EBs in our catalogue
ebs_gb3.dat 108 5648 EB candidates in GB3
ebs_gb9.dat 107 5253 EB candidates in GB9
ebs_gb10.dat 108 3480 EB candidates in GB10
lc/* . 8733 Individual light curves
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Note on table3.dat: including eccentric binaries, eclipsing RS CVn type stars,
binaries with noteworthy phase modulations as well as binaries with
post-main-sequence stellar components, in the GB9 and GB10 fields.
Note on table4.dat: with the uncertainties given by 1σ confidence
intervals from the medians.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name MOA Identifier
22- 27 F6.4 d Pa Period of the primary
29- 34 F6.4 --- Hca Conditional entropy of the primary
36- 41 F6.4 --- Thetaa Phase dispersion minimization (PDM)
of the primary
43- 48 F6.4 d Pb Period of the secondary
50- 55 F6.4 --- Hcb Conditional entropy of the secondary
57- 62 F6.4 --- Thetab Phase dispersion minimization (PDM)
of the secondary
64- 65 I2 h RAh Right ascension (J2000)
67- 68 I2 min RAm Right ascension (J2000)
70- 74 F5.2 s RAs Right ascension (J2000)
76 A1 --- DE- Declination sign (J2000)
77- 78 I2 deg DEd Declination (J2000)
80- 81 I2 arcmin DEm Declination (J2000)
83- 87 F5.2 arcsec DEs Declination (J2000)
89-107 A19 --- OGLE OGLE object within 1 arcsec
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name MOA Identifier
21- 27 F7.4 d P Period
29- 34 F6.4 --- Hc Conditional entropy
36- 41 F6.4 --- Theta Phase dispersion minimization (PDM)
43- 44 I2 h RAh Right ascension (J2000)
46- 47 I2 min RAm Right ascension (J2000)
49- 53 F5.2 s RAs Right ascension (J2000)
55 A1 --- DE- Declination sign (J2000)
56- 57 I2 deg DEd Declination (J2000)
59- 60 I2 arcmin DEm Declination (J2000)
62- 66 F5.2 arcsec DEs Declination (J2000)
68- 75 F8.6 d |Tp-Ts| ?=- Tp-Ts in BJD (1)
77- 95 A19 --- OGLE OGLE object
96 A1 --- n_OGLE [*+] Note on OGLE (2)
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Note (1): Tp and Ts are the reference epochs of primary and secondary eclipse
minima, respectively, measured by the template method in Section 4.2.2.
Note (2): Note as follows:
* = within 1 arcsec
+ = within 2 arcsec
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name MOA Identifier
22- 30 F9.2 10-6d P1 Period of the inner binary determined by
CE method plus the correction c1 (1)
32- 35 F4.2 10-6d E_P1 Error on P1 (upper value)
37- 40 F4.2 10-6d e_P1 Error on P1 (lower value)
42- 45 F4.1 10-10d DP1 Change in inner binary orbital period
(in d/cycle) (2)
47- 50 F4.1 10-10d E_DP1 Error on DP1 (upper value) (in d/cycle)
52- 55 F4.1 10-10d e_DP1 Error on DP1 (lower value) (in d/cycle)
57- 63 F7.1 10-2d P2 Period of the inner binary determined by
CE method
65- 67 F3.1 10-2d E_P2 Error on P2 (upper value)
69- 71 F3.1 10-2d e_P2 Error on P2 (lower value)
73- 76 F4.1 10-2 e2 Eccentricity
78- 80 F3.1 10-2 E_e2 Error on e2 (upper value)
82- 84 F3.1 10-2 e_e2 Error on e2 (lower value)
86- 90 F5.1 deg Omega2 Argument of periastron
92- 95 F4.1 deg E_Omega2 Error on Omega2 (upper value)
97-100 F4.1 deg e_Omega2 Error on Omega2 (lower value)
102-109 F8.2 d tau2 Time of periastron (in MBJD)
111-114 F4.2 d E_tau2 Error on tau2 (upper value) (in MBJD)
116-119 F4.2 d e_tau2 Error on tau2 (lower value) (in MBJD)
121-125 F5.3 au aABsini2 Semi-major axis of AB component
127-131 F5.3 au E_aABsini2 Error on aABsini2 (upper value)
133-137 F5.3 au e_aABsini2 Error on aABsini2 (lower value)
139-142 F4.2 Msun mCmim Minimal mass of the tertiary object (3)
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Note (1): period of the inner binary determined by the CE method plus the
correction, c1, given by the best fit of equation (8) to the ETV curve,
Note (2): DP1=2c2, where c2 is the second-order coefficient in equation (8), is
the change in inner binary orbital period per orbital cycle in units of d/cycle
Note (3): mAB was taken as 2M☉ when calculating mCmin.
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Byte-by-byte Description of file: ebs_gb3.dat ebs_gb10.dat ebs_gb9.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name MOA Identifier
22- 33 F12.9 d P Period
35- 44 F10.8 --- Hc Conditional entropy
46- 55 F10.8 --- Theta Phase dispersion minimization (PDM)
57- 58 I2 h RAh Right ascension (J2000)
60- 61 I2 min RAm Right Ascension (J2000)
63- 67 F5.2 s RAs Right Ascension (J2000)
69 A1 --- DE- Declination sign (J2000)
70- 71 I2 deg DEd Declination (J2000)
73- 74 I2 arcmin DEm Declination (J2000)
76- 80 F5.2 arcsec DEs Declination (J2000)
82-108 A27 --- FileName Name of the light curve file in
subdirectory lc
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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1- 16 F16.8 d JD Julian date
21- 37 F17.8 --- RFlux Relative flux
43- 58 F16.8 --- e_RFlux rms uncertainty on RFlux
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Acknowledgements:
Man Cheung Alex Li, mli351(at)aucklanduni.ac.nz
(End) M.C.A. Li [University of Auckland], Patricia Vannier [CDS] 27-Jul-2018