Image Reconstruction for the Einstein Cross Gravitational Lens QSO 2237+0305

Details Image Reconstruction for the Einstein Cross Gravitational Lens QSO 2237+0305 Image Reconstruction for the Einstein Cross Gravitational Lens QSO 2237+0305

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45..759b&link_type=abstract

Astronomy Reports, Volume 45, Issue 10, October 2001, pp.759-768

Astronomy and Astrophysics

Astronomy

2

Scientific paper

An image-reconstruction algorithm developed by a group of Belgian scientists based on 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 Ma danak 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 an accuracy of 0″.05, and the brightness of individual components with an accuracy of 0.03m for images with 0″.8.

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