• Corpus ID: 207852447

Deprojecting beam systematics for next-generation CMB B-mode searches

  title={Deprojecting beam systematics for next-generation CMB B-mode searches},
  author={Christopher D. Sheehy},
  journal={arXiv: Instrumentation and Methods for Astrophysics},
  • C. Sheehy
  • Published 8 November 2019
  • Physics
  • arXiv: Instrumentation and Methods for Astrophysics
Measurements of the cosmic microwave background polarization are vulnerable to systematic contamination from beam imperfections. Because the unpolarized CMB T is orders of magnitude larger than the polarized E and B signals, even a tiny difference in instrument response between two orthogonally polarized measurements of the CMB will result in a large non-zero differential signal, even if the CMB is unpolarized. Two strategies to mitigate this temperature-to-polarization leakage are the use of a… 

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