137 citations · 466 across the 10 of their papers we have counts for
10 papers
SDSSJ2222+2745 A Gravitationally Lensed Sextuple Quasar with Maximum Image Separation of 15.1" Discovered in the Sloan Giant Arcs Survey
H. Dahle, M. D. Gladders, K. Sharon +11
We report the discovery of a unique gravitational lens system, SDSSJ2222+2745, producing five spectroscopically confirmed images of a z_s=2.82 quasar lensed by a foreground galaxy…
Imprints of a hemispherical power asymmetry in the seven-year WMAP data due to non-commutativity of space-time
N. E. Groeneboom, M. Axelsson, D. F. Mota +1
Non-commutative geometry at inflation can give arise to parity violating modulations of the primordial power spectrum. We develop the statistical tools needed for investigating whe…
Non-Gaussianities in the local curvature of the 5-year WMAP data
Øystein Rudjord, Nicolaas E. Groeneboom, Frode K. Hansen +1
Using the 5 year WMAP data, we re-investigate claims of non-Gaussianities and asymmetries detected in local curvature statistics of the 1 year WMAP data. In Hansen et al 2004, it w…
Bayesian analysis of an anisotropic universe model: systematics and polarization
Nicolaas E. Groeneboom, Lotty Ackerman, Ingunn Kathrine Wehus +1
We revisit the anisotropic universe model previously developed by Ackerman, Carroll and Wise (ACW), and generalize both the theoretical and computational framework to include polar…
A self-contained guide to the CMB Gibbs sampler
Nicolaas E. Groeneboom
We present a consistent self-contained and pedagogical review of the CMB Gibbs sampler, focusing on computational methods and code design. We provide an easy-to-use CMB Gibbs sampl…
The effect of asymmetric beams in the Wilkinson Microwave Anisotropy Probe experiment
Ingunn Kathrine Wehus, Lotty Ackerman, H. K. Eriksen +1
We generate simulations of the CMB temperature field as observed by the WMAP satellite, taking into account the detailed shape of the asymmetric beams and scanning strategy of the…