Article contents
Gravitational Lensing Of Quasar 0957+561 And The Determination Of H0
Published online by Cambridge University Press: 25 May 2016
Extract
The double quasar 0957+561 was the first discovered instance of multiple imaging via gravitational lensing. The galaxy cluster is an important deflector as well as the first ranked galaxy. This has so far precluded construction of a unique model of the lens, reducing the accuracy of the derived H0 value. We have obtained deep images of the system at CFHT. The cluster is sufficiently massive to cause distortions on distant background galaxy images. We have used a mass map derived from lensing distortions to improve the accuracy of the cluster center location and place new limits on H0.
- Type
- Chapter 2: The Hubble Constant & Time Delays
- Information
- Copyright
- Copyright © Kluwer 1996
References
- 3
- Cited by