3 papers
astro-ph1996
Very close pairs of Quasi-Stellar Objects
G. Burbidge, F. Hoyle, P. Schneider
It is pointed out that there are now known four very close pairs of QSOs with separations < 5 arcsec and very different redshifts. Several estimates of the probability that they ar…
astro-ph1994
Steps towards Nonlinear Cluster Inversion Through Gravitational Distortions. II. Generalization of the Kaiser & Squires Method
Carolin Seitz, Peter Schneider
The weak distortions of high-redshift galaxies caused by gravitational light deflection near clusters of galaxies can be used to reconstruct the projected (two-dimensional) surface…
astro-ph1994
Steps towards Nonlinear Cluster Inversion Through Gravitational Distortions. I. Basic Considerations and Circular Clusters
Peter Schneider, Carolin Seitz
The distortion of images of faint, high-redshift galaxies by light deflection at foreground clusters of galaxies can be used to determine the (projected) mass distribution of the c…