My principal research interests lie in:
(1) Gravitational wave astronomy - particularly the use of future gravitational wave observations to constrain cosmological parameters and issues relating to the optimal combination of data from gravitational wave sources and their electromagnetic counterparts.
(2) Statistical methods for the analysis of cosmological data sets, particularly large-scale galaxy redshift and peculiar velocity surveys and surveys of high-redshift supernovae.
(3) Applications of gravitational microlensing, including diagnosis of planetary and stellar atmospheres, circumstellar envelopes and stellar winds, and the impact
of Shapiro delay on the absolute calibration of pulsar timing.