The Crab Nebula as a Calibrator for Wide-beam Cosmic Microwave Background Polarization Surveys

@article{Masi2021TheCN,
  title={The Crab Nebula as a Calibrator for Wide-beam Cosmic Microwave Background Polarization Surveys},
  author={Silvia Masi and Paolo de Bernardis and Fabio Columbro and A. Coppolecchia and Giuseppe d'Alessandro and Lorenzo Mele and Alessandro Paiella and Francesco Piacentini},
  journal={The Astrophysical Journal},
  year={2021},
  volume={921}
}
We analyze the effect of polarized diffuse emission in the calibration of wide-beam millimeter-wave polarimeters, when using the Crab Nebula as a reference source for both polarized brightness and polarization angle. We show that, for CMB polarization experiments aiming at detecting B-mode in a scenario with a tensor to scalar ratio r ∼ 0.001, wide (a few degrees in diameter), precise ( σQ,σU∼20μKCMBarcmin ), high angular resolution (<FWHM) reference maps are needed to properly take into… 

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