Correcting CCD photometry of stars for seeing effects

Details Correcting CCD photometry of stars for seeing effects Correcting CCD photometry of stars for seeing effects

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.395..531k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 395, Issue 1, pp. 531-536.

Astronomy and Astrophysics

Astronomy

1

Methods: Data Analysis, Techniques: Photometric

Scientific paper

Systematic variability in stellar magnitudes, as derived from profile fitting to CCD images, may in some instances be due to variable seeing. It is suggested that this happens in cases where the stars are unresolved pairs, typically with sub-arcsecond separation between the components. It is shown that the fitting of suitable Generalised Additive Models to time series photometry can disentangle intrinsic stellar variability and seeing-induced brightness changes. It is possible that there will be a fixed seeing response associated with a given star which exhibits the effect: estimation of this response from several long photometric runs is demonstrated.

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