Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pasp..116..734c&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 116, Issue 822, pp. 734-744.
Astronomy and Astrophysics
Astronomy
9
Methods: Data Analysis, Techniques: Photometric, Techniques: Image Processing, Techniques: High Angular Resolution, Galaxy: Center
Scientific paper
We have compared three techniques-StarFinder, IDAC (Iterative Deconvolution Algorithm in C), and parametric blind deconvolution (PBD)-for extracting photometry and astrometry of stars in densely crowded field adaptive optics observations, and their point-spread functions (PSFs). The three algorithms investigated produce very similar results over dynamic ranges of 4 mag, accurately measuring relative photometry to within 0.1 mag for dynamic ranges of 5 mag, as well as astrometry to within 10% of the PSF width. At larger dynamic ranges, the photometry is more dependent upon the field crowding, the signal-to-noise ratio, and the algorithm used.
Christou Julian C.
Drummond Jack D.
Köhler Rainer
Pugliese Giovanna
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