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…