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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
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:
FileName Lrecl Records Explanations
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
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Feb-2011
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