J/A+AS/139/69 UBV Astrometry and Photometry of doubles (Shatsky+, 1999) ================================================================================ UBV absolute CCD photometry and differential astrometry of a sample of visual double stars with A-type primaries Shatsky N., Sinachopoulos D., Prado P., van Dessel E. =1999A&AS..139...69S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, double and multiple ; Photometry, UBV Keywords: stars: binaries: visual - techniques: photometric - astrometry Description: UBV CCD absolute photometry and differential astrometry of 111 southern visual binaries are presented. Observations have been performed at Las Campanas Observatory (Chile) in 1991-92 at 61-cm telescope. The separation range is 2.5-8arcsec. The mean epoch of the measurements is 1992.0. The photometry (table 1) was calibrated by one night of standard star observations. The positional parameters (table 3) are given in the reference system J2000 and calibrated using Hipparcos and CDS data. An additional table 2 provides the notes on observational circumstances. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 64 222 Photometric data table2.dat 77 30 Notes table3.dat 43 111 Positional parameters -------------------------------------------------------------------------------- See also: I/237 : The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 h RAh Right ascension: hours (J2000) (1) 3- 5 I3 0.1min RAdm Right ascension: deci-minutes (J2000) 6- 6 A1 --- DE- Declination sign 7- 8 I2 deg DEd Declination: degrees (J2000) 9- 10 I2 arcmin DEm Declination: minutes (J2000) 12- 19 A8 --- DM Durchmusterung designation (2) 21- 21 A1 --- Comp [AB] Component designation (1) 23- 28 F6.3 mag Vmag V magnitude 30- 34 F5.3 mag e_Vmag rms uncertainty on Vmag (3) 36- 41 F6.3 mag U-B ? Colour index 43- 47 F5.3 mag e_U-B ? rms uncertainty on U-B (3) 49- 54 F6.3 mag B-V Colour index 56- 60 F5.3 mag e_B-V rms uncertainty on B-V (3) 62 I1 --- Nobs Number of observations 64 A1 --- Note [*] Note in table 2 -------------------------------------------------------------------------------- Note (1): Taken from "The Washington Visual Double Star Catalog", US Naval Observatory (Worley C.E., Douglass G.G., 1996, Cat. ) Note (2): Corresponds to the particular durchmusterung depending on declination: Zone = [+89,-22]: Bonn Durchmusterung Zone = [-23,-51]: Cordoba Durchmusterung Zone = [-52,-89]: Cape Durchmusterung Note (3): For secondaries (Comp="B") this error is that of differency of magnitude or colour, measured between the secondary and primary components. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 h RAh Right ascension: hours (J2000) (1) 3- 5 I3 0.1min RAdm Right ascension: decimals of minutes (J2000) 6- 6 A1 --- DE- Declination sign 7- 8 I2 deg DEd Declination: degrees (J2000) 9- 10 I2 arcmin DEm Declination: minutes (J2000) 12- 77 A66 --- Note Note for object observations -------------------------------------------------------------------------------- Note (1): Taken from "The Washington Visual Double Star Catalog", US Naval Observatory (Worley C.E., Douglass G.G., 1996) -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 h RAh Right ascension: hours (J2000) 3- 5 I3 0.1min RAdm Right ascension: decimals of minutes (J2000) 6- 6 A1 --- DE- Declination sign 7- 8 I2 deg DEd Declination: degrees (J2000) 9- 10 I2 arcmin DEm Declination: minutes (J2000) 12- 17 I6 --- HIP ? Hipparcos Output Catalogue (Cat. ) number 19- 23 F5.3 arcsec rho Separation 25- 29 F5.3 arcsec e_rho rms uncertainty on rho (1) 31- 36 F6.2 deg theta Positional angle (J2000) 38- 41 F4.2 deg e_theta rms uncertainty on theta (1) 43- 43 I1 --- Nobs Number of observations -------------------------------------------------------------------------------- Note (1): includes calibration uncertainties -------------------------------------------------------------------------------- Acknowledgements: Nicolaj Ivanovich Shatsky ================================================================================ (End) Patricia Bauer [CDS] 04-Jun-1999