Cosmology from Cluster SZ and Weak Lensing Data
  Weak gravitational lensing and the Sunyaev-Zel'dovich effect provide complementary information on the composition of clusters of galaxies. Preliminary results from cluster SZ observations with the Very Small Array are presented. A Bayesian approach to combining this data with wide field lensing data is then outlined; this allows the relative probabilities of cluster models of varying complexity to be computed. A simple simulation is used to demonstrate the importance of cluster model selection in cosmological parameter determination. 
P.J. Marshall, K. Lancaster, M.P. Hobson and K.J.B. Grainge   (University of Cambridge)