Searching for systematics in SNIa and galaxy cluster data using the cosmic duality relation

Understand

We compare two different probes of the expansion history of the universe, namely, luminosity distances from type Ia supernovae and angular diameter distances from galaxy clusters, using the Bayesian interpretation of Crossing statistic [1, 2] in conjunction with the assumption of cosmic duality relation.

• Our analysis is conducted independently of any a-priori assumptions about the nature of dark energy.
• The model independent method which we invoke searches for inconsistencies between SNIa and galaxy cluster data sets.
• If detected such an inconsistency would imply the presence of systematics in either of the two data sets.