J/AJ/135/850 Properties of eclipsing binaries found in TrES (Devor+, 2008)
Identification, classifications, and absolute properties of 773 eclipsing
binaries found in the trans-atlantic exoplanet survey.
Devor J., Charbonneau D., O'Donovan F.T., Mandushev G., Torres G.
<Astron. J., 135, 850-877 (2008)>
=2008AJ....135..850D 2008AJ....135..850D
ADC_Keywords: Binaries, eclipsing ; Models ; Proper motions ; Magnitudes
Keywords: binaries: eclipsing - catalogs - methods: data analysis -
stars: statistics - techniques: photometric
Abstract:
In recent years, we have witnessed an explosion of photometric
time-series data, collected for the purpose of finding a small
number of rare sources, such as transiting extrasolar planets and
gravitational microlenses. Once combed, these data are often set
aside, and are not further searched for the many other variable
sources that they undoubtedly contain. To this end, we describe a
pipeline that is designed to systematically analyze such data, while
requiring minimal user interaction. We ran our pipeline on a subset of
the Trans-Atlantic Exoplanet Survey dataset, and used it to identify
and model 773 eclipsing binary systems. For each system we conducted a
joint analysis of its light curve, colors, and theoretical isochrones.
This analysis provided us with estimates of the binary's absolute
physical properties, including the masses and ages of their stellar
components, as well as their physical separations and distances. We
identified three types of eclipsing binaries that are of particular
interest and merit further observations. The first category includes
11 low-mass candidates, which may assist current efforts to explain
the discrepancies between the observation and the models of stars at
the bottom of the main sequence. The other two categories include 34
binaries with eccentric orbits, and 20 binaries with abnormal light
curves. Finally, this uniform catalog enabled us to identify a number
of relations that provide further constraints on binary population
models and tidal circularization theory.
Description:
The data that we analyzed originate from ten fields of the
Trans-atlantic Exoplanet Survey (TrES; Alonso et al.,
2004ApJ...613L.153A 2004ApJ...613L.153A). TrES employs a network of three automated
telescopes to survey 6°x6° fields-of-view. To avoid potential
systematic noise, we use the data from only one telescope, Sleuth,
located at the Palomar Observatory in Southern California.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 10 Observational parameters of the TrES fields
table7.dat 334 876 Eclipsing Binary catalog (773 stars)
table9.dat 457 88 EBs that appear in either the VSX or the SIMBAD
astronomical databases
phot/* . 773 Individual r-band normalized light curve
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2010)
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2010)
V/115 : Semi-detached eclipsing binaries (Surkova+, 2004)
V/118 : Catalog of eclipsing binaries parameters (Perevozkina+, 1999)
V/119 : Catalogue of field contact binary stars (Pribulla+, 2003)
V/120 : Catalog of early-type contact binaries (Bondarenko+, 1996)
V/124 : Approximate elements of eclipsing binaries (Svechnikov+, 1990)
V/121 : Catalog of DMS-type eclipsing binaries (Svechnikov+, 1999)
J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)
http://www.cfa.harvard.edu/~jdevor/Catalog.html : online author's catalog
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Field Field designation
6- 20 A15 --- Const Constellation name
22- 23 I2 h RAh Hour of right ascension (J2000) (1)
25- 26 I2 min RAm Minute of right ascension (J2000)
28- 34 F7.4 s RAs Second of right ascension (J2000)
36 A1 --- DE- Declination sign (J2000) (1)
37- 38 I2 deg DEd Degree of declination (J2000)
40- 41 I2 arcmin DEm Arcminute of declination (J2000)
43- 48 F6.3 arcsec DEs Arcsecond of declination (J2000)
50- 55 F6.2 deg GLON Galactic longitude coordinate l
57- 63 F7.2 deg GLAT Galactic latitude coordinate b
65- 73 F9.1 d T.start Starting epoch (HJD)
75- 83 F9.1 d T.end Ending epoch (HJD)
85- 88 F4.1 d Dur Duration
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Note (1): ICRS 2000.0 coordinates of the guide star, which is located at
the center of the field of view.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Cat Eclipsing category (G1)
15- 26 A12 --- [DCO2008] Binary designation (2)
27 A1 --- f_[DCO2008] [*] Flag on T-Cas0-00524 (3)
28- 29 I2 h RAh Hour of Right Ascension (J2000)
31- 32 I2 min RAm Minute of Right Ascension (J2000)
34- 39 F6.3 s RAs Second of Right Ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Degree of Declination (J2000)
44- 45 I2 arcmin DEm Arcminute of Declination (J2000)
47- 51 F5.2 arcsec DEs Arcsecond of Declination (J2000)
53- 63 F11.8 d Per Orbital period
65- 74 F10.8 d e_Per Uncertainty in Per
76- 83 F8.4 [solMass] M1 ?=-99 Primary (more massive) component mass
85- 92 F8.4 [solMass] e_M1 ? Uncertainty in M1
93 A1 --- f_M1 Flag on e_M1 (4)
94-101 F8.4 [solMass] M2 ?=-99 Secondary (less massive) component mass
103-110 F8.4 [solMass] e_M2 ? Uncertainty in M2
111 A1 --- f_M2 Flag on e_M2 (4)
112-119 F8.4 Gyr Age ?=-99 System age (assumed to be coeval)
121-128 F8.4 Gyr e_Age ? Uncertainty in Age
129 A1 --- f_Age Flag on e_Age (4)
130-136 F7.3 --- Score ?=-99 Weighted reduced χ2 of MECI model
(5)
138-144 A7 --- Iso Isochrone table used (6)
146-150 F5.1 --- W ?=-99 Relative weight of LC fit (5)
152-158 A7 --- r_pm Proper motion measurement database (7)
160-166 F7.1 mas/yr pmRA Right Ascension component of proper motion
168-173 F6.1 mas/yr pmDE Declination component of proper motion
175-178 F4.2 arcsec epos Distance between this work and proper
motion database
180-185 F6.3 mag Bmag ?=90 USNO-B B-band magnitude (8)
187-192 F6.3 mag Rmag USNO-B R-band magnitude (8)
194-199 F6.4 --- 3rd Fraction of third-light flux blended (9)
201-206 F6.3 mag Jmag 2MASS J-band magnitude converted to ESO J-band
208-213 F6.3 mag Hmag 2MASS H-band magnitude converted to ESO H-band
215-220 F6.3 mag Kmag 2MASS Ks-band magnitude converted to ESO
K-band
222-228 F7.3 mag JMAG ?=-99 Absolute ESO J-band magnitude from
isochrone table
230-236 F7.3 mag HMAG ?=-99 Absolute ESO H-band magnitude from
isochrone table
238-244 F7.3 mag KMAG ?=-99 Absolute ESO K-band magnitude from
isochrone table
246-253 F8.3 pc Dist ?=-99 Distance from extinction-correct
distance modulus
255-261 F7.3 mag AV ?=-99 Galactic ISM V-band absorption
263-271 F9.5 --- sini ?=-99 The sine of the orbital inclination
273-280 F8.4 --- ecosw ?=-99 Robust lower eccentricity limit (10)
282-289 F8.4 --- e ?=-99 Orbital eccentricity
291-298 F8.4 --- e_e ? Uncertainty in e (-1 = assumed value)
299 A1 --- f_e Fit at parameter bound on e_e (4)
300-306 F7.3 mag Dm1 ?=-99 R-band primary (deeper) eclipse depth
308-316 F9.3 d T0-1 ?=-99 Heliocentric Julian Date at center of
primary eclipse
318-324 F7.3 mag Dm2 ?=-99 R-band secondary (shallower) eclipse
depth
326-334 F9.3 d T0-2 ?=-99 Heliocentric Julian Date at center of
secondary eclipse
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Note (2): Composed of the TrES field (see Table 1) and index.
<[DCO2008] T-CCCN-NNNNN> in Simbad.
Note (3): Coordinates of T-Cas0-00524 have been corrected according to the
online author's catalog erratum but as it was matched up with a wrong
2MASS source, its listed colors and MECI analysis results are wrong.
This target is a known Algol-type eclipsing binary, identified as
"V364 Cas" in the GCVS and Simbad.
Note (4): Flag as follows:
-1 = one of the other parameters is at the upper/lower bound.
-2 = the best fit is at the parameter lower bound.
-3 = the best fit is at the parameter upper bound.
Note (5): MECI = Method for Eclipsing Component Identification, see Devor &
Charbonneau (2006ApJ...653..647D 2006ApJ...653..647D) for futher details.
Note (6): References as follows:
Y2 = Kim et al. (2002ApJS..143..499K 2002ApJS..143..499K);
Baraffe = Baraffe et al. (1998, Cat. J/A+A/337/403);
N/A = Not applicable.
Note (7): PM references as follows:
UCAC = Zacharias et al. (2004, Cat I/289 superseded by UCAC3, Cat. I/315);
USNO-B = Monet et al. (2003, Cat. I/284);
Salim03 = Salim & Gould (2003, Revised NLTT, Cat. J/ApJ/582/1011).
Note (8): Average of both magnitude measurements, if available.
Note (9): i.e. the R-band flux within 30", excluding the target, divided by
the total flux within 30".
Note (10): As in equation (1): ecosω~π/2xΔt/P
where P is the period.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cat Eclipsing category (G1)
12- 23 A12 --- [DCO2008] Binary designation (T- FFFF-NNNNN)
25- 26 I2 h RAh Hour of right ascension (J2000)
28- 29 I2 min RAm Minute of right ascension (J2000)
31- 36 F6.3 s RAs Second of right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Degree of declination (J2000)
42- 43 I2 arcmin DEm Arcminute of declination (J2000)
45- 49 F5.2 arcsec DEs Arcsecond of declination (J2000)
51- 55 A5 --- SpType Spectral type
57- 85 A29 --- Otype Object type
87-457 A371 --- Xid VSX (International Variable Star Index) or
SIMBAD identifiers
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Byte-by-byte Description of file: phot/*
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Bytes Format Units Label Explanations
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1- 16 F16.10 d HJD Heliocentric Julian Date minus 2400000
18- 26 F9.6 --- rmag Normalized r-band magnitude
28- 35 F8.6 --- e_rmag Magnitude uncertainty
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Global Notes:
Note (G1): The last step (10th) of the pipeline is to classify the resulting
systems using both automatic and manual criteria. Seven groups are
described as follows:
Eccentric = EBs with unequally-spaced eclipses
Circular = EBs with equally-spaced but distinct eclipses
Ambig-unequal = Ambiguous-unequal: EBs with undetected secondary eclipses
Ambig-equal = Ambiguous-equal: EB with equally-spaced and indistinguishable
eclipses
Inverted = detached EBs that are not successfully modeled by MECI
Roche-filled = Roche-lobe-filling: non-detached EBs that are filling at least
one Roche-lobe
Abnormal = EBs with atypical out-of-eclipse distortions
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Jun-2010