LensCLEAN results for 0218+357 - Lens position and H0

Talk given at the Jodrell Bank internal symposium on 10. October 2001

O. Wucknitz [1,2]

  1. Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL, UK
  2. Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany

Abstract

After some words about lensing and what can be done for the system JVAS B0218+357 with classic lens modelling, I proceed with radio interferometry. I explain why the CLEAN algorithm can be used to recover the brightness distributions of unlensed sources and give a brief introduction to the LensCLEAN method and present some results for 0218+357. These are the position of the lensing galaxy which was not known before and a robust estimate of the Hubble constant using the time delay.

For more details, have a look at my PhD thesis and Paper I and Paper II on the subject.



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