Astronomy Reports

, Volume 45, Issue 10, pp 759–768 | Cite as

Image reconstruction for the Einstein cross gravitational lens QSO 2237+0305

  • V. A. Belokurov
  • E. V. Shimanovskaya
  • M. V. Sazhin
  • A. G. Yagola
  • B. P. Artamonov
  • V. N. Shalyapin
  • I. Khamitov
Article

Abstract

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\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \)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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Copyright information

© MAIK "Nauka/Interperiodica" 2001

Authors and Affiliations

  • V. A. Belokurov
    • 1
  • E. V. Shimanovskaya
    • 2
  • M. V. Sazhin
    • 1
  • A. G. Yagola
    • 2
  • B. P. Artamonov
    • 1
  • V. N. Shalyapin
    • 3
  • I. Khamitov
    • 4
  1. 1.Sternberg Astronomical InstituteMoscowRussia
  2. 2.Moscow State UniversityMoscowRussia
  3. 3.Radio Astronomy InstituteKharkovUkraine
  4. 4.Ouloug-Beg Astronomical InstituteTashkentUzbekistan

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