Cosmic radio dipole: Estimators and frequency dependence

@article{Siewert2020CosmicRD,
  title={Cosmic radio dipole: Estimators and frequency dependence},
  author={T. M. Siewert and Matthias Schmidt-Rubart and Dominik J. Schwarz},
  journal={Astronomy \& Astrophysics},
  year={2020}
}
The origin and contributions to the Cosmic Radio Dipole are of great interest in cosmology. Recent studies revealed open questions about the nature of the observed Cosmic Radio Dipole. We use simulated source count maps to test a linear and a quadratic Cosmic Radio Dipole estimator for possible biases in the estimated dipole directions and contributions from the masking procedure. We find a superiority of the quadratic estimator, which is then used to analyse the TGSS-ADR1, WENSS, SUMSS, and… 
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