Abstract
We investigate direction dependence and non-Gaussian features in high-z cosmological data using Δχ2 and Δχ statistics and the Kolmogorov–Smirnov test. These techniques are applied on a set of calibrated long gamma-ray bursts (GRBs) and its combination with recent Type Ia supernovae data (Union2). Our statistical analysis shows a weak but consistent direction dependence in both the data sets. The analysis also indicates a non-Gaussian nature of errors in both data sets.
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