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      Determination of miscalibrated polarization angles from observed cosmic microwave background and foreground EB power spectra: Application to partial-sky observation

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      Progress of Theoretical and Experimental Physics

      Oxford University Press (OUP)

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          Abstract

          We study a strategy to determine miscalibrated polarization angles of cosmic microwave background (CMB) experiments using the observed $EB\(polarization power spectra of CMB and Galactic foreground emission. We apply the methodology of Y. Minami et al. (Prog. Theor. Exp. Phys. 2019, 083E02, 2019), developed for full-sky observations to ground-based experiments such as Simons Observatory. We take into account the \)E$-to-$B$ leakage and $\ell$-to-$\ell\(covariance due to partial sky coverage using the public code NaMaster. We show that our method yields an unbiased estimate of miscalibrated angles. Our method also enables simultaneous determination of miscalibrated angles and the intrinsic \)EB\(power spectrum of polarized dust emission when the latter is proportional to \)\sqrt{C_\ell^{EE}C_\ell^{BB}}\(and \)C_\ell^{BB}\(is proportional to \)C_\ell^{EE}$.

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          Author and article information

          Journal
          Progress of Theoretical and Experimental Physics
          Oxford University Press (OUP)
          2050-3911
          June 2020
          June 01 2020
          June 2020
          June 01 2020
          June 08 2020
          : 2020
          : 6
          Affiliations
          [1 ]High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
          Article
          10.1093/ptep/ptaa057
          741da131-c58c-4d27-8c4d-32d16fb01958
          © 2020

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