Astron. Astrophys. Suppl. Ser.
Volume 139, Number 3, November I 1999
|Page(s)||425 - 431|
|Published online||15 November 1999|
II. CCD photometry and differential astrometry of 288 southern "Intermediate” systems
Koninklijke Sterrenwacht van België, Ringlaan 3, B–1180 Brussel, Belgium
2 Observatorium Hoher List der Universitätssternwarte Bonn, D–54550 Daun, Germany
Send offprint request to: J. Cuypers
Accepted: 6 May 1999
We present photometric and astrometric data of about 280 visual double stars of the "intermediate” class, i.e. with angular separations mainly in the range 2″ < ρ < 12″. The observations have been obtained in 1991–92 with a CCD camera attached to the 91 cm Dutch telescope at ESO La Silla, Chile. Differential magnitudes of the double star components as well as magnitudes and colour indices of the individual components have been determined in the Cousins V and I passbands with an internal error of about 0.005 mag and an external accuracy of less than 0.03 mag. In addition, angular separations have been secured to an internal accuracy of 0.004″ and position angles to about 0.05° .
Key words: stars: binaries: visual / astrometry
Tables 1 to 4 are only available in electronic form at the CDS via ftp to cdsarc.u-strasbg.fr (220.127.116.11) or via http://cdsweb.u-strasbg.fr/Abstract.html
© European Southern Observatory (ESO), 1999