J/AJ/136/452 Astrometric studies of GAT stars (Gatewood, 2008)
Astrometric studies of Aldebaran, Arcturus, Vega, the Hyades, and other regions.
Gatewood G.
<Astron. J., 136, 452-460 (2008)>
=2008AJ....136..452G 2008AJ....136..452G
ADC_Keywords: Associations, stellar ; Parallaxes, trigonometric ; Proper motions
Keywords: stars: individual (81 Cancri, Aldebaran, Arcturus, Hyades, Ross 248,
Vega)
Abstract:
The results of astrometric studies in the regions of Groombridge 34A,
the Hyades, Aldebaran, Ross 47, BD+5 1668, 81 Cancri, BD+15 2620,
Arcturus, Vega, and Ross 248 are presented. Estimates of the absolute
parallax of each star are presented and a mass estimate is present for
81 Cancri. Comments include the discussion of the apparent motions of
a few previously suggested planetary systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 97 Adjustment to weighted absolute parallax
table2.dat 97 128 Star parameters
table3.dat 31 53 Number cross index
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- GAT [877/1366] Allegheny Observatory catalog
star number
6- 11 A6 --- SpType Adopted spectral class
13- 17 F5.2 mas plx Spectroscopic parallax
19- 22 F4.2 mas e_plx rms uncertainty on plx
24- 28 F5.2 mas plxP Provisional parallax
30- 33 F4.2 mas e_plxP rms uncertainty on plxP
35- 39 F5.2 mas Wadj Weighted adjustment
41- 44 F4.2 --- Weight Weight
46- 50 F5.2 mas plxO Observed parallax
52- 56 F5.2 mas Diff Difference, plx-plxO
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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- 4 I4 --- GAT [877/1366] Allegheny Observatory catalog
star number
6 I1 --- Dev Device number (unexplained)
8- 12 F5.2 mag Vmag V magnitude
14- 18 F5.2 mag B-V B-V colour index
20- 24 F5.1 mas plx Parallax
26- 28 F3.1 mas e_plx rms uncertainty on plx
30- 31 I2 h RAh Right ascension (J2000, Ep=J2000)
33- 34 I2 min RAm Right ascension (J2000, Ep=J2000)
36- 43 F8.5 s RAs Right ascension (J2000, Ep=J2000)
45- 53 F9.6 s/yr pmRA Proper motion along RA at epoch J2000
55 A1 --- DE- Declination sign (J2000, Ep=J2000)
56- 57 I2 deg DEd Declination (J2000, Ep=J2000)
59- 60 I2 arcmin DEm Declination (J2000, Ep=J2000)
62- 68 F7.4 arcsec DEs Declination (J2000, Ep=J2000)
70- 77 F8.5 arcsec/yr pmDE Proper motion along DE at epoch J2000
79- 82 F4.2 ms e_RAs rms uncertainty on RA at epoch J2000
84- 88 F5.3 ms/yr e_pmRA rms uncertainty on pmRA at epoch J2000
90- 92 F3.1 mas e_DEs rms uncertainty on DE at epoch J2000
94- 97 F4.2 mas/yr e_pmDE rms uncertainty on pmDE at epoch J2000
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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- 4 I4 --- GAT Allegheny Observatory catalog star number
9- 14 I6 --- HD ? HD number
17- 24 A8 --- BD BD number
26- 31 I6 --- HIP ? HIP number
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Feb-2011