CCD photometry and astrometry of visual double and multiple stars of the HIPPARCOS Catalogue - II. CCD photometry and differential astrometry of 288 southern "Intermediate" systems

We present photometric and astrometric data of about 280 visual double star s of the "intermediate" class, i.e. with angular separations mainly in the range 2 " < rho < 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 magnitude s and colour indices of the individual components have been determined in t he 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 separation s have been secured to an internal accuracy of 0.004 " and position angles to about 0.05 degrees(1).