Combining supernovae and LSS information with the CMB

Observations of the Cosmic Microwave Background (CMB), large scale structur e (LSS) and standard candies such as Type 1a Supernovae (SN) each place dif ferent constraints on the values of cosmological parameters. We assume an i nflationary Cold Dark Matter model with a cosmological constant, in which t he initial density perturbations in the universe are adiabatic. We discuss the parameter degeneracies inherent in interpreting CMB or SN data, and der ive their orthogonal nature. We then present our preliminary results of com bining CMB and SN likelihood functions. The results of combining the CMB an d IRAS 1.2 Jy survey information are given, with marginalised confidence re gions in the H-0, Omega(m), b(IRAS) and Q(rms-ps) directions assuming n = 1 , Omega(Lambda) + Omega(m) = 1 and Omega(b)h(2) = 0.024, Finally we combine all three likelihood functions and find that the three data sets are consi stent and suitably orthogonal, leading to tight constraints on H-0, Omega(m ), b(IRAS) and Q(rms-ps), given our assumptions.