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astro-ph1999
Gravitational lensing statistics with extragalactic surveys. I. A lower limit on the cosmological constant
Ralf Quast, Phillip Helbig
We reanalyse optical gravitational lens surveys from the literature in order to determine relative probabilities in the - plane, using a softened singular isothermal…
astro-ph1999
Gravitational lensing statistics with extragalactic surveys. III. Joint constraints on lambda_0 and Omega_0 from lensing statistics and the m-z relation for type Ia supernovae
Phillip Helbig
I present constraints on cosmological parameters in the lambda_0-Omega_0 plane from a joint analysis of gravitational lensing statistics (astro-ph/9904175) and the magnitude-redshi…