Signals of statistical anisotropy in WMAP foreground-cleaned maps (2009)
Samal, Pramoda Kumar, Saha, Rajib, Jain, Pankaj, Ralston, John P.
Recently, a symmetry-based method to test for statistical isotropy of the cosmic microwave background was developed. We apply the method to template-cleaned 3- and 5-years Wilkinson Microwave...
Samal, Pramoda Kumar, Saha, Rajib, Delabrouille, Jacques, Prunet, Simon, Jain, Pankaj, Souradeep, Tarun
We estimate CMB polarization and temperature power spectra using WMAP 5-year foreground contaminated maps. The power spectrum is estimated by using a model independent method, which does not utilize...
Signals of Statistical Anisotropy in WMAP Foreground-Cleaned Maps (2008)
Samal, Pramoda Kumar, Saha, Rajib, Jain, Pankaj, Ralston, John P.
Recently a symmetry-based method to test for statistical isotropy of the cosmic microwave background was developed. We apply the method to template-cleaned 3-year and 5-year WMAP-$DA$ maps. We...
Testing Isotropy of Cosmic Microwave Background Radiation (2007)
Samal, Pramoda Kumar, Saha, Rajib, Jain, Pankaj, Ralston, John P.
We introduce new symmetry-based methods to test for isotropy in cosmic microwave background radiation. Each angular multipole is factored into unique products of power eigenvectors, related...