Anthony Lasenby

TL;DR: In this paper, the authors describe observations at frequencies near 15 GHz of the second 2×2-deg2 field imaged with the Cambridge Cosmic Anisotropy Telescope (CAT), and show that the signal arises predominantly from the cosmic microwave background (CMB) radiation for multipoles in the lower half of this range.

TL;DR: In this article, the maximum entropy method (MEM) is used for enhancing astronomical images and, in particular, has been applied to cosmic microwave background (CMB) observations, and the authors give a systematic discussion of how to combine these two approaches by the use of the MEM in wavelet bases for denoising and deconvolution of general images.

TL;DR: In this article, the authors examined the three-year WMAP and the NVSS data for correlation induced by the integrated Sachs-Wolfe (ISW) effect, and the most significant detection was obtained in the correlation of the signed intensity of local features at a significance of 99.9%.

TL;DR: In this paper, the authors present the techniques employed for observing, mapping and source extraction from a large-scale radio-source survey at 15.7 GHz using the Arcminute Microkelvin Imager Large Array.

TL;DR: In this article, an extension of the harmonic space maximum-entropy component separation method (MEM) for multifrequency cosmic microwave background observations is presented, which allows one to perform the separation with more plausible assumptions about the receiver noise and foreground astrophysical components.