@article{KoopmansdeBruynWambsganss2000,
  author    = {Koopmans, L. V. E. and de Bruyn, A. G. and Wambsganß, Joachim},
  title     = {Radio Microlensing and dark-matter in high-z galaxies},
  year      = {2000},
  language  = {en}
}
@article{LehmannHasingerGiacconietal.2000,
  author    = {Lehmann, Ingo and Hasinger, G{\"u}nther and Giacconi, R. and Gunn, J. E. and Schmidt, M. and Schneider, D. P. and Stanke, Thomas and Tr{\"u}mper, J. and Wambsganß, Joachim and Woods, D. and Zamorani, G.},
  title     = {One of the highest redshift X-Ray selected clusters of galaxies},
  isbn      = {3-540-67163-3},
  year      = {2000},
  language  = {en}
}
@article{Wambsganss2001,
  author    = {Wambsganß, Joachim},
  title     = {Gravitational Lensing : a universal astrophysical tool},
  year      = {2001},
  abstract  = {In the roughly 20 years of its existence as an observational science, gravitational lensing has established itself as a valuable tool in many astrophysical fields. In the introduction of this review we briefly present the basics of lensing. Then it is shown that the two propagation effects, lensing and scintillation, have a number of properties in common. In the main part various lensing phenomena are discussed with emphasis on recent observations.},
  language  = {en}
}
@article{KoopmansWambsganss2001,
  author    = {Koopmans, L. V. E. and Wambsganß, Joachim},
  title     = {On the probability of microlensing in gamma-ray burst afterglows},
  year      = {2001},
  abstract  = {The declining light curve of the optical afterglow of gamma-ray burst (GRB) GRB000301C showed rapid variability with one particularly bright feature at about t-t0=3.8d. This event was interpreted as gravitational microlensing by Garnavich, Loeb \& Stanek and subsequently used to derive constraints on the structure of the GRB optical afterglow. In this paper, we use these structural parameters to calculate the probability of such a microlensing event in a realistic scenario, where all compact objects in the universe are associated with observable galaxies. For GRB000301C at a redshift of z=2.04, the a posteriori probability for a microlensing event with an amplitude of m>=0.95mag (as observed) is 0.7 per cent (2.7 per cent) for the most plausible scenario of a flat -dominated Friedmann- Robertson-Walker (FRW) universe with m=0.3 and a fraction f*=0.2 (1.0) of dark matter in the form of compact objects. If we lower the magnification threshold to m>=0.10mag, the probabilities for microlensing events of GRB afterglows increase to 17 per cent (57 per cent). We emphasize that this low probability for a microlensing signature of almost 1mag does not exclude that the observed event in the afterglow light curve of GRB000301C was caused by microlensing, especially in light of the fact that a galaxy was found within 2arcsec from the GRB. In that case, however, a more robust upper limit on the a posteriori probability of ~5 per cent is found. It does show, however, that it will not be easy to create a large sample of strong GRB afterglow microlensing events for statistical studies of their physical conditions on microarcsec scales.},
  language  = {en}
}
@article{Wambsganss2001,
  author    = {Wambsganß, Joachim},
  title     = {Microlensing of Quasars},
  year      = {2001},
  abstract  = {Microlens-induced variability in multiple quasars can be used to study two cosmological issues of great interest, the size and brightness profile of quasars on one hand, and the distribution of compact (dark) matter along the line of sight on the other. Here a summary is given of recent theoretical progress as well as observational evidence for quasar microlensing, plus a discussion of desired observations and required theoretical studies.},
  language  = {en}
}
@article{Wambsganss2001,
  author    = {Wambsganß, Joachim},
  title     = {Gravity's kaleidoscope : four consequences of gravitational light deflection},
  year      = {2001},
  language  = {en}
}
@article{SchindlerCastilloMoralesDeFilippisetal.2001,
  author    = {Schindler, Sabine and Castillo-Morales, A. and De Filippis, E. and Schwope, A. D. and Wambsganß, Joachim},
  title     = {Discovery of depressions in the X-ray emission of the distant galaxy cluster RBS797 in a CHANDRA observation},
  year      = {2001},
  abstract  = {We present CHANDRA observations of the X-ray luminous, distant galaxy cluster RBS797 at z=0.35. In the central region the X-ray emission shows two pronounced X-ray minima, which are located opposite to each other with respect to the cluster centre. These depressions suggest an interaction between the central radio galaxy and the intra-cluster medium, which would be the first detection in such a distant cluster. The minima are symmetric relative to the cluster centre and very deep compared to similar features found in a few other nearby clusters. A spectral and morphological analysis of the overall cluster emission shows that RBS797 is a hot cluster (T=7.7+1.2-1.0 keV) with a total mass of Mtot(r500)= 6.5+1.6-1.2 *E14Msun.},
  language  = {en}
}
@article{Wambsganss2001,
  author    = {Wambsganß, Joachim},
  title     = {Quasar Microlensing},
  isbn      = {1-583-81074-9},
  year      = {2001},
  language  = {en}
}
@article{Wambsganss2001,
  author    = {Wambsganß, Joachim},
  title     = {Cosmological microlensing},
  isbn      = {1-583-81076-5},
  year      = {2001},
  language  = {en}
}
@article{Wambsganss2001,
  author    = {Wambsganß, Joachim},
  title     = {Gravitational lensing as a universal astrophysical tool},
  year      = {2001},
  language  = {en}
}