Discovery of a New Gravitational Lense System

Details Discovery of a New Gravitational Lense System Discovery of a New Gravitational Lense System

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987msngr..50...24c&link_type=abstract

The Messenger, vol. 50, p. 24-24

Astronomy and Astrophysics

Astrophysics

Scientific paper

From detailed observations of several of the most luminous quasars, it has been found that the aso UM 673 (z = 2.72) is a gravitationallens system (Surdej, J., Magain, P., Swings, J.-P., Borgeest, U., Gourvoisier, 1. J. -L., Kayser, R., Kellermann, K.I., Kuehr, H., and Refsdal, S., 1987, Nature 329,695; Surdej, J., Magain, P., Swings, J.-P., Borgeest, U., Gourvoisier, T.J.-L., Kayser, R., Kellermann, K.I., Kuehr, H., and Refsdal, S., 1987, submitted to Astronomy and Astrophysics). This observational programme is designed to estimate how many of the highly luminous quasars are so luminous because of amplification effects by gravitational lensing. It is mostly conducted at ESO by the team who wrote the quoted papers.

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