Activities and achievements of the Double Star Committee of the French Astronomical Society

Details Activities and achievements of the Double Star Committee of the French Astronomical Society Activities and achievements of the Double Star Committee of the French Astronomical Society

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..117a&link_type=abstract

Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he

Astronomy and Astrophysics

Astrophysics

Scientific paper

Created in 1981 by Pierre DURAND with the support of Paul MULLER, the Double Star Committee constitutes ever since a forum of exchange of experiences and information in the field of double stars, particularly visual. The Committee relies on the advice of its scientific counsellors (in particular Pierre BACCHUS, Daniel BONNEAU, Paul COUTEAU and Jean DOMMANGET) to guide the work of its members. By fostering missions in observatories, it has stimulated the activities of observation and measurement of double stars. It has also encouraged the publication of measures (A&A and ``Observations et Travaux '') and raised up missions of verification of double star positions. Under its aegis, many series of measures of double stars made in particular with the 50 cm refractor at the Nice Observatory, either with a filar micrometer or with a CCD camera, were published. Uncertain positions of pairs have been checked and corrected. For the treatment of numerical images of double stars, software aiming in particular at the determination of position elements and the magnitude difference between components were tested and others created (e.g. REDUC and SURFACE). The spar plate double image micrometer of Lyot was developed and its fabrication raised up. Preliminary orbits of double stars were calculated, an amateur participates in the maintenance of the database of double star measures SiDoNie and pursues an historical research on the life and work of Robert JONCKHEERE. The Internet site of the Committee, created in 2005, informs the laypersons as well as the experienced amateurs (http:// saf.etoilesdoubles.free.fr).

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