We report the discovery, using NICMOS on the Hubble Space Telescope, of an arcsec-diameter Einstein ring in the gravitational lens system B1938 +666. The lensing galaxy is also detected, and is most likely an early-type galaxy. Modelling of the ring is presented and compared with the radio structure from MERLIN maps. We show that the Einstein ring is consistent with the gravitational lensing of an extended infrared component, centred between the two radio components.
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- April 1998
- galaxies: active - galaxies: individual: B1938 +666 - gravitational lensing;
- 4 pages including 3 figures. LaTeX. Submitted to MNRAS letters. Colour ps.gz file of Einstein ring at http://www.jb.man.ac.uk/~njj/glens/1938/1938all.ps.gz