| Issue |
A&A
Volume 472, Number 3, September IV 2007
|
|
|---|---|---|
| Page(s) | 1055 - 1057 | |
| Section | Online catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361:20066290 | |
| Published online | 16 July 2007 | |
CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars *,**
1
Institute of Astronomy and Astrophysics, National Observatory of Athens, I. Metaxa & Bas. Pavlou 15236, Greece e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2
National & Kapodistrian University of Athens, Dept. of Astronomy, Astrophysics and Mechanics e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
3
INAF – Osservatorio Astronomico di Roma, via de Frascati 33, Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
4
Observatory of the University of Bordeaux, France e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
5
University of Cape Town
6
South African Astronomical Observatory e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
23
August
2006
Accepted:
21
May
2007
Abstract
Context.We measured the angular separations, position angles, 
, 
and
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.
Key words: stars: binaries: visual / astrometry
Based on observations made at Kryonerion Observatory of the National Observatory of Athens, Greece, and the South African Astronomical Observatory.
Full Table 1 and Tables 2, 3 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/472/1055
© ESO, 2007
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