First attempt at measuring the CMB cross-polarization

Details First attempt at measuring the CMB cross-polarization First attempt at measuring the CMB cross-polarization

2002-04-02

arxiv.org/abs/astro-ph/0204021v1

Phys.Rev.D67:023003,2003

Astronomy and Astrophysics

Astrophysics

Polarization movies can be found at http://www.hep.upenn.edu/~angelica/polarization.html

Scientific paper

10.1103/PhysRevD.67.023003

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.

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