J/AJ/140/1623 PHASES diff. astrometry data archive. II. (Muterspaugh+, 2010)
The PHASES differential astrometry data archive. II. Updated binary star orbits and a long period eclipsing binary. Muterspaugh M.W., Hartkopf W.I., Lane B.F., O'Connell J., Williamson M., Kulkarni S.R., Konacki M., Burke B.F., Colavita M.M., Shao M., Wiktorowicz S.J. <Astron. J., 140, 1623-1630 (2010)> =2010AJ....140.1623M
ADC_Keywords: Stars, double and multiple ; Positional data ; Interferometry Keywords: astrometry - binaries: close - binaries: eclipsing - binaries: visual - techniques: interferometric Abstract: Differential astrometry measurements from the Palomar High-precision Astrometric Search for Exoplanet Systems have been combined with lower precision single-aperture measurements covering a much longer timespan (from eyepiece measurements, speckle interferometry, and adaptive optics) to determine improved visual orbits for 20 binary stars. In some cases, radial velocity observations exist to constrain the full three-dimensional orbit and determine component masses. The visual orbit of one of these binaries - α Com (HD 114378) - shows that the system is likely to have eclipses, despite its very long period of 26 years. The next eclipse is predicted to be within a week of 2015 January 24. Description: PHASES differential astrometry measurements were obtained using the observing method and standard data analysis pipeline described in Paper I (Cat. J/AJ/140/1579). The measurements themselves and associated measurement uncertainties are also tabulated in Paper I (Cat. J/AJ/140/1579). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 30 20 Number of PHASES and Non-PHASES measurements and unit-weight uncertainties for non-PHASES measurements table2.dat 50 2936 Non-PHASES astrometric measurements
See also: J/AJ/140/1579 : PHASES diff. astrometry data archive. I. (Muterspaugh+, 2010) J/AJ/140/1657 : PHASES diff. astrometry data archive. V. (Muterspaugh+, 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD star number 8- 9 I2 --- NP Number of PHASES measurements used for orbit fitting 11 I1 --- NPO Number of non-PHASES astrometric measurements used for orbit fitting 13- 15 I3 --- NNP Additional numbers of PHASES measurements rejected as outliers 17- 18 I2 --- NNPO Additional numbers of non-PHASES measurements rejected as outliers 20- 25 F6.4 arcsec e_rho 1sigma measurement uncertainties for unit-weight measurements from non-PHASES observations in ρ (1) 27- 30 F4.2 deg e_theta 1sigma measurement uncertainties for unit-weight measurements from non-PHASES observations in theta (1)
Note (1): determined by iterating Keplerian fits to the measurements with removal of 3sigma or greater outliers in either dimension.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD Star HD number 10- 18 F9.4 yr Date Decimal year of the measurement 20- 24 F5.3 arcsec rho Separation ρ 26- 31 F6.2 deg theta Position angle θ 33- 37 F5.3 arcsec e_rho The 1σ uncertainty in rho 39- 43 F5.2 deg e_theta The 1σ uncertainty in theta 45- 48 F4.1 --- w Measurement weight 50 I1 --- fO [0/1] Outlier code: 1=>3σ outlier, and omitted from the fit.
History: From electronic version of the journal References: Muterspaugh et al., Paper I 2010AJ....140.1579M, Cat. J/AJ/140/1579 Muterspaugh et al., Paper III 2010AJ....140.1631M Muterspaugh et al., Paper IV 2010AJ....140.1646M Muterspaugh et al., Paper V 2010AJ....140.1657M, Cat. J/AJ/140/1657
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-Jul-2012
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|