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Gravitational Lensing - A brief review
Joachim Wambsganss
Gravitational lensing has established itself as a valuable tool in many astrophysical fields in the roughly 20 years of its existence as an observational science. In this brief rev…
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…
Cosmological Microlensing
Joachim Wambsganss
Variability in gravitationally lensed quasars can be due to intrinsic fluctuations of the quasar or due to ``microlensing'' by compact objects along the line of sight. If disentang…
A radio-microlensing caustic crossing in B1600+434?
L. V. E. Koopmans, A. G. de Bruyn, J. Wambsganss +1
First, we review the current status of the detection of strong `external' variability in the CLASS gravitational B1600+434, focusing on the 1998 VLA 8.5-GHz and 1998/9 WSRT multi-f…