J/AJ/132/50 Double stars in astrometric catalogs (Wycoff+, 2006)
Data mining for double stars in astrometric catalogs.
Wycoff G.L., Mason B.D., Urban S.E.
<Astron. J., 132, 50-60 (2006)>
=2006AJ....132...50W 2006AJ....132...50W
ADC_Keywords: Stars, double and multiple
Keywords: binaries: visual
Abstract:
The US Naval Observatory has mined over 140 astrometric catalogs,
including the Astrographic Catalogue and the Two Micron All Sky
Survey, for measures of double stars. This resulted in 114,218 new
measures of 47,007 different systems spanning 110 years; these are now
included in the Washington Double Star catalog (WDS). This is the
single largest data set ever added to the WDS. The measures are
typically of wider pairs, most between 4" and 30" thus, their value in
aiding orbit determination is limited. However, they have proven
invaluable in the verification of systems and the determination of
rectilinear motions of systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 349 119 Number of Double Star Measures
table2.dat 68 114218 Measurement of Double Stars
table5.dat 69 280 New WFC Doubles
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See also:
I/128 : Photographic Obs. Visual Double Stars (van Albada-van Dien+ 1987)
I/209 : Catalogue of 2700 double stars (Couteau, 1995)
I/237 : The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/154 : Astrographic Catalogue, Zones -02 to +31 degrees (Roeser 1990)
I/155 : Astrographic Catalogue, Zones -02 to +31 degrees (Roeser 1990)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Ref Observation Code
10- 49 A40 --- Cat Catalogue description
50- 54 I5 --- Nmeas Number of measures
56-349 A294 --- Text Catalogue reference
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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- 2 I2 h RAh Right Ascension (J2000)
4- 7 F4.1 min RAm Right Ascension (J2000)
9 A1 --- DE- Sign of the Declination (J2000)
10- 11 I2 deg DEd Declination (J2000)
13- 14 I2 arcmin DEm Declination (J2000)
16- 22 A7 --- Name Discoverer designation
24- 28 A5 --- m_Name Additional system components
30- 36 F7.2 yr Epoch Epoch of observation
38- 42 F5.1 deg PA Position angle
44- 50 F7.3 arcsec Sep Separation
52 I1 --- Nobs Number of observations contained in the mean
54- 61 A8 --- Ref Reference code (1)
63- 64 I2 --- Aper ? Telescope aperture in inches (2.54cm)
66 A1 --- Meth Observing method: F=CCD, M=transit circle,
G=astrograph
68 A1 --- Note [K] indicates an infrared measure (2MASS,
Cat. II/246)
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Note (1): The reference code is a eight character code indicating
the reference source detailed in Table 1.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension (J2000)
4- 7 F4.1 min RAm Right Ascension (J2000)
9 A1 --- DE- Sign of the Declination (J2000)
10- 11 I2 deg DEd Declination (J2000)
13- 14 I2 arcmin DEm Declination (J2000)
16- 22 A7 --- Name Discoverer designation
24- 25 A2 --- m_Name Additional system components
27- 30 I4 yr Obs1 Year of the first observation
32- 35 I4 yr Obs2 Year of the last observation
37 I1 --- Nobs Number of observations
39- 41 I3 deg PA1 First positional angle measured
43- 45 I3 deg PA2 Last positional angle measured
47- 51 F5.1 arcsec Sep1 First separation measured
53- 57 F5.1 arcsec Sep2 Last separation measured
59- 63 F5.2 mag mag1 Primary magnitude
65- 69 F5.2 mag mag2 Secondary magnitude
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Aug-2007