Precise Estimation of Source Intensity for Wide-field Telescopes with PSF Modeling

Abstract Wide-field small aperture optical telescopes are widely used in large-scale surveys currently and they have made great contributions a number of astronomical applications. However, specific challenges arise owing to the defects caused by system, image quality reduction precision negatively affected. An innovative method is proposed address these achieve high-precision source intensity estimation. In implementation, first dedicated pipeline developed investigate point-spread function (PSF) components from large amounts images, using principal component analysis. Then PSF model that reveals actual characteristics system constructed based on evaluation. Last equations for centroid estimation results obtained. A trial observations performed with wide-field telescope, raw as well simulated acquired test efficiency our method. The measurement other common algorithms, including modified moment, Gaussian fitting, SExtractor. Based comparison it demonstrated outperforms others. indicate explores limitations such additional gains can be achieved wider