Microlensing results from APO monitoring of the double quasar Q0957+561A,B between 1995 and 1998

Joachim Wambsganss, Robert W. Schmidt, Wesley N. Colley +2

If the halo of the lensing galaxy 0957+561 is made of massive compact objects (MACHOs), they must affect the lightcurves of the quasar images Q0957+561 A and B differently. We sear…