Deconvolution method for accurate astrometry and photometry on adaptive optics images of stellar fields

Jean-Pierre Veran; Francois J. Rigaut

doi:10.1117/12.321740

11 September 1998 Deconvolution method for accurate astrometry and photometry on adaptive optics images of stellar fields

Jean-Pierre Veran, Francois J. Rigaut

Author Affiliations +

Proceedings Volume 3353, Adaptive Optical System Technologies; (1998) https://doi.org/10.1117/12.321740
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

We present a method to accurately find the position and photometry of each source in a stellar field blurred by the adaptive optics corrected point spread function (AO PSF). The method takes into account the specificities of the object as well as the specificities of the AO PSF. The algorithm is based on the minimization in the Fourier domain of a regularized least square objective function using the Levenberg-Marquardt method. Astrometric and photometric data of each source are retrieved with an excellent accuracy and super-resolution is achieved. The performance of the method in terms of accuracy is assessed on simulated fields. Then, we present results obtained on images of the Galactic Center, a very crowded field on which the method shows remarkable robustness and stability.

Citation Download Citation

Jean-Pierre Veran and Francois J. Rigaut "Deconvolution method for accurate astrometry and photometry on adaptive optics images of stellar fields", Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); https://doi.org/10.1117/12.321740

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