First attempt at measuring the CMB cross-polarization
Abstract
We compute upper limits on CMB cross-polarization by cross-correlating the PIQUE and Saskatoon experiments. We also discuss theoretical and practical issues relevant to measuring cross-polarization and illustrate them with simulations of the upcoming BOOMERanG 2002 experiment. We present a method that separates all six polarization power spectra (TT, EE, BB, TE, TB, EB) without any other "leakage" than the familiar EE-BB mixing caused by incomplete sky coverage. Since E and B get mixed, one might expect leakage between TE and TB, between EE and EB and between BB and EB - our method eliminates this by preserving the parity symmetry under which TB and EB are odd and the other four power spectra are even.
Keywords
Cite
@article{arxiv.astro-ph/0204021,
title = {First attempt at measuring the CMB cross-polarization},
author = {Angelica de Oliveira-Costa and Max Tegmark and Matias Zaldarriaga and Denis Barkats and Josh O. Gundersen and Matt M. Hedman and Suzanne T. Staggs and Bruce Winstein},
journal= {arXiv preprint arXiv:astro-ph/0204021},
year = {2009}
}
Comments
Polarization movies can be found at http://www.hep.upenn.edu/~angelica/polarization.html