VLBI observations of the gravitational-lens images of Q0957 + 561

Details VLBI observations of the gravitational-lens images of Q0957 + 561 VLBI observations of the gravitational-lens images of Q0957 + 561

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983liaco..24..178g&link_type=abstract

IN: Quasars and gravitational lenses; Proceedings of the Twenty-fourth Liege International Astrophysical Colloquium, Cointe-Ougr

Mathematics

Logic

2

Gravitational Lenses, Quasars, Very Long Base Interferometry, Time Lag

Scientific paper

A series of VLBI observations of the gravitational-lens images of the quasar Q0957 + 561 (Walsh et al., 1979) has been conducted utilizing the Mark III VLBI data acquisition system (Rogers et al., 1983). The goals of these observations are to: (1) map the milliarcsecond structure of the A and B images, (2) detect the predicted third image of the quasar, and (3) determine the time delay between the images. These results will be used to constrain the mass distribution of the lens and, possibly, cosmological constants.

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