Speaker
Mr
Meghendra Singh Mr.
(UPTU Lucknow)
Description
We use the ∆χ2 statistic introduced in Gupta, Saini & Laskar (2008); Gupta, Saini
(2010) to study directional dependence, in the high-z supernovae data. This depen-
dence could arise due to departures from the cosmological principle or from direc-
tion dependent statistical systematics in the data. We apply our statistic to the gold
data set from Riess et al. (2004) and Riess et al. (2007), and Union2 catalogue from
Amanullah et al. (2010). Our results show that all the three data sets show a weak
but consistent direction dependence. In 2007 data errors are Gaussian, however other
two data sets show non-Gaussian features.
Author
Mr
Meghendra Singh Mr.
(UPTU Lucknow)
