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Searching for MACHOs in Galaxy Clusters
Geraint F. Lewis, Rodrigo A. Ibata, J. Stuart B. Wyithe
If cluster dark matter is in the form of compact objects it will introduce fluctuations into the light curves of distant sources. Current searches for MACHOs in clusters of galaxie…
Gravitational Microlensing of Gamma Ray Bursts at Medium Optical Depth
J. S. B. Wyithe, E. L. Turner
Gravitational lensing of a gamma ray burst (GRB) by a single point mass will produce a second, delayed signal. Several authors have discussed using microlensed GRBs to probe a poss…
Determining the Microlens Mass Function from Quasar Microlensing Statistics
J. S. B. Wyithe, E. L. Turner
The first investigations of the response of the microlensing magnification pattern (at an optical depth of order unity) to the mass function of the microlenses found that the resul…
Gravitational Lens Statistics for Generalized NFW Profiles: Parameter Degeneracy and Implications for Self-Interacting Cold Dark Matter
J. S. B. Wyithe, E. L. Turner, D. N. Spergel
Strong lensing is a powerful probe of the distribution of matter in the cores of clusters of galaxies. Recent studies suggest that the cold dark matter model predicts cores that ar…
Interpretation of the OGLE Q2237+0305 microlensing light-curve
J. S. B. Wyithe, E. L. Turner, R. L. Webster
The four bright images of the gravitationally lensed quasar Q2237+0305 are being monitored from the ground (eg. OGLE collaboration, Apache Point Observatory) in the hope of observi…
Predicting caustic crossing high magnification events in Q2237+0305
J. S. B. Wyithe, E. L. Turner, R. L. Webster +1
The central regions of the gravitationally lensed quasar Q2237+0305 can be indirectly resolved on nano-arcsecond scales if viewed spectrophotometricly during a microlensing high ma…