Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sass...27...13b&link_type=abstract
The Society for Astronomical Sciences 27th Annual Symposium on Telescope Science. Held May 20-22, 2008 at Big Bear Lake, CA. Pub
Astronomy and Astrophysics
Astrophysics
Scientific paper
The CCD-imaging equipment that many amateur astronomers use for astrophotography and photometry can also be used to measure the separation, position angle, and magnitude difference of visual double stars. There are a few imaging and data analysis procedures that are unique to this project. I describe a simple PSF-model that provides good accuracy and repeatability in measurements of pairs which -- due to their close spacing and/or large magnitude difference -- would be beyond the reach of standard astrometric software. This project has some conceptual similarities to asteroid lightcurve determination: in both cases, we are presented with a huge number of potential targets that need observation; repeated observation at different epochs adds value to the initial observations; there are very few professional astronomers pursuing these studies; and there exists a Journal devoted to publication of these observations so that they will be available to the professional community. Hence, double star measurement may be a fruitful area for amateur contributions.
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