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An excess of emission in the dark cloud LDN 1111 with the Arcminute Microkelvin Imager
AMI Consortium, :, A. M. M. Scaife +13
We present observations of the Lynds' dark nebula LDN 1111 made at microwave frequencies between 14.6 and 17.2 GHz with the Arcminute Microkelvin Imager (AMI). We find emission in…
Compressed sensing imaging techniques for radio interferometry
Y. Wiaux, L. Jacques, G. Puy +2
Radio interferometry probes astrophysical signals through incomplete and noisy Fourier measurements. The theory of compressed sensing demonstrates that such measurements may actual…
The Arcminute Microkelvin Imager
AMI Consortium, :, J. T. L. Zwart +57
The Arcminute Microkelvin Imager is a pair of interferometer arrays operating with six frequency channels spanning 13.9-18.2 GHz, with very high sensitivity to angular scales 30''-…
Observations of the Corona Borealis supercluster with the superextended Very Small Array: further constraints on the nature of the non-Gaussian CMB cold spot
Ricardo Genova-Santos, Jose Alberto Rubino-Martin, Rafael Rebolo +16
We present interferometric imaging at 33 GHz, with the new superextended configuration of the Very Small Array (VSA), of a very deep decrement in the cosmic microwave background (C…
Simulating full-sky interferometric observations
J. D. McEwen, A. M. M. Scaife
Aperture array interferometers, such as that proposed for the Square Kilometre Array (SKA), will see the entire sky, hence the standard approach to simulating visibilities will not…
Multi-frequency spectral analysis of extragalactic radio sources in the 33-GHz VSA catalogue: sources with flattening and upturn spectrum
M. Tucci, J. A. Rubiño-Martin, R. Rebolo +11
We present an analysis of the spectral properties of the extragalactic radio sources in the nearly-complete VSA sample at 33GHz. Data from different surveys are used to study sourc…
Constraints on spinning dust towards Galactic targets with the VSA: a tentative detection of excess microwave emission towards 3C396
Anna Scaife, David A. Green, Richard A. Battye +18
We present results from observations made at 33 GHz with the Very Small Array (VSA) telescope towards potential candidates in the Galactic plane for spinning dust emission. In the…
Non-Gaussianity in the Very Small Array CMB maps with Smooth-Goodness-of-fit tests
Jose Alberto Rubino-Martin, Antonio M. Aliaga, R. B. Barreiro +31
(Abridged) We have used the Rayner & Best (1989) smooth tests of goodness-of-fit to study the Gaussianity of the Very Small Array (VSA) data. Out of the 41 published VSA individual…
High-significance Sunyaev-Zel'dovich measurement: Abell 1914 seen with the Arcminute Microkelvin Imager
AMI Collaboration, R. Barker, P. Biddulph +47
We report the first detection of a Sunyaev-Zel'dovich (S-Z) decrement with the Arcminute Microkelvin Imager (AMI). We have made commissioning observations towards the cluster A1914…
CMB observations from the CBI and VSA: A comparison of coincident maps and parameter estimation methods
N. Rajguru, S. T. Myers, R. A. Battye +32
We present coincident observations of the Cosmic Microwave Background (CMB) from the Very Small Array (VSA) and Cosmic Background Imager (CBI) telescopes. The consistency of the fu…
Cosmological parameter estimation using Very Small Array data out to l=1500
Rafael Rebolo, Richard A. Battye, Pedro Carreira +29
We estimate cosmological parameters using data obtained by the Very Small Array (VSA) in its extended configuration, in conjunction with a variety of other CMB data and external pr…
High sensitivity measurements of the CMB power spectrum with the extended Very Small Array
Clive Dickinson, Richard A. Battye, Kieran Cleary +29
We present deep Ka-band ( GHz) observations of the CMB made with the extended Very Small Array (VSA). This configuration produces a naturally weighted synthesized FWHM…