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Science 6 January 1984:
Vol. 223. no. 4631, pp. 46 - 49
DOI: 10.1126/science.223.4631.46
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Articles

Discovery of a New Gravitational Lens System

C. R. LAWRENCE 1, D. P. SCHNEIDER 2, M. SCHMIDT 2, C. L. BENNETT 3, J. N. HEWITT 3, B. F. BURKE 3, E. L. TURNER 4, and J. E. GUNN 4

1 Department of Physics, Massachusetts Institute of Technology, Cambridge 02139, and Radio Astronomy 105-24, California Institute of Technology, Pasadena 91125
2 Department of Astronomy, California Institute of Technology
3 Department of Physics, Massachusetts Institute of Technology
4 Princeton University Observatory, Peyton Hall, Princeton, New Jersey 08544

A new gravitational lens system, the triple radio source MG2016+112, has been discovered. Five emission lines at a redshift of 3.2733±0.0014 have been identified in the spectra of two stellar objects of magnitude 22.5 coincident with radio components 3.4 arc seconds apart. The lines are the narrowest ever observed in objects at such a large redshift. The redshift of a 23rd-magnitude extended optical object coincident with the third radio component has not been determined spectroscopically, but its known optical properties are consistent with those of a giant elliptical galaxy with a redshift of about 0.8.

Submitted on November 17, 1983
Accepted on December 7, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Gravitational Lens Optics.
R. D. BLANDFORD, C. S. KOCHANEK, I. KOVNER, and R. NARAYAN (1989)
Science 245, 824-830
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Science. ISSN 0036-8075 (print), 1095-9203 (online)