Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...238..465s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 238, no. 1-2, Nov. 1990, p. 465-468.
Astronomy and Astrophysics
Astrophysics
1
Astronomical Photometry, Binary Stars, Error Analysis, Astrometry, Broadband, Charge Coupled Devices, Rayleigh Scattering, Refraction, Scanning
Scientific paper
A theoretical investigation is presented of the influence of photometric passband effects on the observed parameters of close visual binaries, obtained by the area scanning technique. A simple numerical model incorporating wavelength-dependent refraction and absorption quantifies the variations with spectral type of effective wavelength and of effective refraction and shows that the use of broad band filters can lead to sizeable systematic errors in the observed distances and/or position angles. With the help of the same model it is also demonstrated that, contrary to long-held beliefs, the respective intensity profiles of the components are neither identical nor symmetric. A simple and straightforward procedure for the correction, as a function of color and zenith distance, of astrometric parameters of double stars is developed, and the consequences for existing surveys are shortly discussed. It is found that effects of similar importance must be expected in two-dimensional unfiltered CCD photometry of binaries.
No associations
LandOfFree
Theoretical aspects of area scanner photometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Theoretical aspects of area scanner photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical aspects of area scanner photometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-838554