Information content in the angular power spectrum of weak lensing: wavelet method

  title={Information content in the angular power spectrum of weak lensing: wavelet method},
  author={Hao-ran Yu and Joachim Harnois-D'eraps and Tong-Jie Zhang and Ue-li Pen},
  journal={Monthly Notices of the Royal Astronomical Society},
We quantify the performance of a non-linear Wiener filter, constructed in wavelet space, at recovering some of the Fisher information that was lost in the weak lensing convergence field. The proposed method consists of a separation of the original field into the sum of a Gaussian and a non-Gaussian contribution. After filtering an ensemble of such fields, which are obtained from N-body simulations, we find that we can recapture about four times more Fisher information, an effect that can… Expand

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