Image reconstruction for the Einstein cross gravitational lens QSO 2237+0305статья
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Аннотация:An image-reconstruction algorithm developed by a group of Belgian scientists based oil the regularization method of Tikhonov is Studied and applied to images of the gravitational lens QSO 2237+0305 obtained during long-term observations using the 1.5-m telescope at the Maidanak Observatory. The algorithm separates the observed image into two parts: a (galactic) background Plus images of the quasar. The method has enabled appreciable improvement in the accuracy of astrometric and photometric measurements of this gravitational-lens system. The positions of the quasar images are determined with all accuracy of 0.” 05, and the brightness of individual components with an accuracy of 0.03(m) for images with FWHM approximate to 0.”8. (C) 2001 MAIK “Nauka/Interperiodica”.