| Literature DB >> 16068158 |
D Walsh, R F Carswell, R J Weymann.
Abstract
0957 + 561 A, B are two QSOs of mag 17 with 5.7 arc s separation at redshift 1.405. Their spectra leave little doubt that they are associated. Difficulties arise in describing them as two distinct objects and the possibility that they are two images of the same object formed by a gravitational lens is discussed.Year: 1979 PMID: 16068158 DOI: 10.1038/279381a0
Source DB: PubMed Journal: Nature ISSN: 0028-0836 Impact factor: 49.962