no code implementations • 1 Sep 2012 • Toshiya Namikawa, Duncan Hanson, Ryuichi Takahashi
We present new methods for lensing reconstruction from CMB temperature fluctuations which have smaller mean-field and reconstruction noise bias corrections than current lensing estimators, with minimal loss of signal-to-noise.
Cosmology and Nongalactic Astrophysics
no code implementations • 11 Jan 2011 • Antony Lewis, Anthony Challinor, Duncan Hanson
Lensing of the CMB generates a significant bispectrum, which should be detected by the Planck satellite at the 5-sigma level and is potentially a non-negligible source of bias for f_NL estimators of local non-Gaussianity.
Cosmology and Nongalactic Astrophysics
no code implementations • 28 May 2009 • Duncan Hanson, Kendrick M. Smith, Anthony Challinor, Michele Liguori
We study the effects of gravitational lensing on the estimation of non-Gaussianity from the bispectrum of the cosmic microwave background (CMB) temperature anisotropies.
Cosmology and Nongalactic Astrophysics