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- M. Ashdown, F. Atrio-Barandela, +50 authors D. Harrison
- 2013

We analyse the implications of the Planck data for cosmic inflation. The Planck nominal mission temperature anisotropy measurements, combined with the WMAP large-angle polarization, constrain the scalar spectral index to n s = 0.9603 ± 0.0073, ruling out exact scale invariance at over 5σ. Planck establishes an upper bound on the tensor-to-scalar ratio at r… (More)

- H. K. Eriksen, C. Dickinson, +6 authors K. Vanderlinde
- 2008

We propose a solution to the CMB component separation problem based on standard parameter estimation techniques. We assume a parametric spectral model for each signal component, and fit the corresponding parameters pixel by pixel in a two-stage process. First we fit for the full parameter set (e.g., component amplitudes and spectral indices) in… (More)

We describe a fast and accurate method for estimation of the cosmic microwave background (CMB) anisotropy angular power spectrum — Monte Carlo Apodised Spherical Transform EstimatoR. Originally devised for use in the interpretation of the Boomerang experimental data, MASTER is both a computationally efficient method suitable for use with the currently… (More)

We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg^{2} patch of sky centered on RA 0 h, Dec. -57.5°. The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven… (More)

- P. A. R. Ade, N. Aghanim, +170 authors D. Munshi
- 2015

We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg 2 patch of sky centered on RA 0h, Dec. −57.5 •. The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven… (More)

- C. Hikage, T. Matsubara, P. Coles, M. Liguori, F. K. Hansen, S. Matarrese
- 2008

We present an analysis of the Minkowski Functionals (MFs) describing the WMAP three-year temperature maps to place limits on possible levels of primordial non-Gaussianity. In particular, we apply perturbative formulae for the MFs to give constraints on the usual non-linear coupling constant f NL. The theoretical predictions are found to agree with the MFs… (More)

- S M Leach, J.-F Cardoso, +27 authors P Vielva
- 2008

Context. The Planck satellite will map the full sky at nine frequencies from 30 to 857 GHz. The CMB intensity and polarization that are its prime targets are contaminated by foreground emission. Aims. The goal of this paper is to compare proposed methods for separating CMB from foregrounds based on their different spectral and spatial characteristics, and… (More)

We apply the Gabor transform methodology proposed in (Hansen et al. 2002, 2003) to the WMAP data in order to test the statistical properties of the CMB fluctuation field and specifically to evaluate the fundamental assumption of cosmological isotropy. In particular, we apply the transform with several apodisation scales, thus allowing the determination of… (More)

We report on the results from two independent but complementary statistical analyses of the WMAP data. In the first, the data are subjected to an N-point correlation function analysis, and in the second to a power spectrum analysis. We focus on large and intermediate scales (larger than about 3 •), and compare the observed data on these scales against Monte… (More)

- Amit P. S. Yadav, Eiichiro Komatsu, Benjamin D. Wandelt, Michele Liguori, Frode K. Hansen, Sabino Matarrese
- 2007

In our recent paper (Yadav et al. 2007) we described a fast cubic (bispectrum) estimator of the amplitude of primordial non-Gaussianity of local type, f N L , from a combined analysis of the Cosmic Microwave Background (CMB) temperature and E-polarization observations. In this paper we generalize the estimator to deal with a partial sky coverage as well as… (More)