2 papers
astro-ph2000
Constraints on source and lens parameters from microlensing variability in QSO 0957+561 A,B
S. Refsdal, R. Stabell, J. Pelt +1
From regular monitoring of the Double Quasar QSO 0957+561 A,B there is now general agreement on a time delay of about 416 days. This has made it possible to determine the microlens…
astro-ph1998
High resolution optical and near-IR imaging of the quadruple quasar RX J0911.4+0551
I. Burud, F. Courbin, C. Lidman +10
We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3.1", it is the quadruply imaged QSO with the wid…