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J/A+A/472/1055    CCD astrometry of visual double stars    (Sinachopoulos+ 2007)

CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars. Sinachopoulos D., Gavras P., Dionatos O., Ducourant C., Medupe T. <Astron. Astrophys. 472, 1055 (2007)> =2007A&A...472.1055S
ADC_Keywords: Stars, double and multiple ; Positional data ; Photometry, CCD Keywords: stars: binaries - astrometry Abstract: We measured the angular separations, position angles, Delta(V), Delta(y) and Delta(I) of wide visual double stars during the period 2003-2005. At least one component of the double stars in our sample has an entry in the Hipparcos catalogue. Description: Results were obtained for angular separation, position angle, Delta(V) and partially Delta(I) photometry for 213 northern HIPPARCOS wide visual double stars and 219 southern. In the Southern Hemisphere y filter was used instead of V and I. Our data were gathered using the 1.2m telescope of the Kryonerion observatory and the 1.0m SAAO telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 81 213 CCD measurements of visual binaries in V filter for the north hemisphere table2.dat 81 55 CCD measurements of visual binaries in I filter for the north hemisphere table3.dat 81 219 CCD measurements of visual binaries in y filter for south hemisphere
See also: I/237 : The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996) I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) I/260 : Visual Double Stars in Hipparcos (Dommanget+, 2000) J/A+AS/139/425 : CCD photometry and astrometry of double stars (Cuypers+, 1999) J/A+A/374/132 : CCD photometry and astrometry of double stars (Lampens+, 2001) Byte-by-byte Description of file: table1.dat table2.dat table3.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right Ascension (hours) (J2000) 4- 5 I2 min RAm Right Ascension (minutes) (J2000) 7- 10 F4.1 s RAs Right Ascension (seconds) (J2000) 12 A1 --- DE- Declination (sign) (J2000) 13- 14 I2 deg DEd Declination (degrees) (J2000) 16- 17 I2 arcmin DEm Declination (minutes) (J2000) 19- 20 I2 arcsec DEs Declination (seconds) (J2000) 22- 31 A10 --- WDS Name from Washington Double Star (Cat. I/237) 32- 33 A2 --- m_WDS Component(s) designation 35- 40 F6.3 arcsec rho Angular Separation 42- 46 F5.3 arcsec e_rho Error of angular separation 48- 53 F6.2 deg theta Position angle of components 55- 58 F4.2 deg e_theta Error of position angle 60- 64 F5.3 mag Dmag ? Difference in the magnitude of components 66- 70 F5.3 mag e_Dmag ? Error of difference in the magnitude 72- 78 F7.2 yr Epoch Epoch of observations 80- 81 I2 --- Exp Number of exposures
Acknowledgements: Based on observations made at Kryonerion Observatory , Greece. D. Sinachopoulos and P. Gavras would like to thank the Greek Secretary of Research and Technology for its support in the frame of the ATHENOGAIA project. D. Sinachopoulos thanks the South African University of North West for its invitation and support of the present project in September 2004. Panos Gavras, pgavras(at)
(End) P. Gavras [UOA-NOA] 16-Apr-2007
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