CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars

Sinachopoulos, D; Gavras, P; Dionatos, O; Ducourant, Ch; Medupe, Th

CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars

Journal Article

2007

Journal Title

Astronomy and Astrophysics

Link to Journal

https://dx.doi.org/10.1051/0004-6361:20066290

Department

Department of Astronomy

Faculty

Faculty of Science

Abstract

Context.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.Aims. Our measurements are a contribution to the study of the nature of these double stars. Methods.The northern double stars of the project were observed with the 1.2 m telescope of the Kryonerion observatory and the southern with the 1.0 m SAAO. We performed multiple-exposure CCD imaging of our targets and used the standard procedure of data reduction and astrometric CCD calibrations. Results.We present measurements of 213 northern and 219 southern wide binaries.

Keywords

stars: binaries: visual

astrometry

Reference:

Collections

Journal Articles

Full item page