Cosmic microwave background observations from the Cosmic Background Imager and Very Small Array: a comparison of coincident maps and parameter estimation methods

Nutan Rajguru; Steven T. Myers; Richard A. Battye; J. Richard Bond; Kieran Cleary; Carlo R. Contaldi; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Keith Grainge; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rüdiger Kneissl; Katy Lancaster; Anthony Lasenby; Brian S. Mason; Timothy J. Pearson; Guy G. Pooley; Anthony C. S. Readhead; Rafael Rebolo; Graca Rocha; José Alberto Rubiño-Martin; Richard D. E. Saunders; Richard S. Savage; Anna Scaife; Paul F. Scott; Jonathan L. Sievers; Anže Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

doi:10.1111/j.1365-2966.2005.09519.x

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Cosmic microwave background observations from the Cosmic Background Imager and Very Small Array: a comparison of coincident maps and parameter estimation methods

Nutan Rajguru, Steven T. Myers, Richard A. Battye, J. Richard Bond, Kieran Cleary, Carlo R. Contaldi, Rod D. Davies, Richard J. Davis, Clive Dickinson, Ricardo Genova-Santos, …

Monthly notices of the Royal Astronomical Society, Vol.363(4), pp.1125-1135

11/2005

DOI: https://doi.org/10.1111/j.1365-2966.2005.09519.x

Abstract

cosmic microwave background

cosmology: observations

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 full data sets is tested in the map plane and the Fourier plane, prior to the usual compression of CMB data into flat bandpowers. Of the three mosaics observed by each group, two are found to be in excellent agreement. In the third mosaic, there is a 2σ discrepancy between the correlation of the data and the level expected from Monte Carlo simulations. This is shown to be consistent with increased phase calibration errors on VSA data during summer observations. We also consider the parameter estimation method of each group. The key difference is the use of the variance window function in place of the bandpower window function, an approximation used by the VSA group. A re-evaluation of the VSA parameter estimates, using bandpower windows, shows that the two methods yield consistent results.

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Title: Cosmic microwave background observations from the Cosmic Background Imager and Very Small Array: a comparison of coincident maps and parameter estimation methods
Creators - without role: Nutan Rajguru - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Steven T. Myers - National Radio Astronomy Observatory
Richard A. Battye - SKA Observatory
J. Richard Bond - University of Toronto
Kieran Cleary - SKA Observatory
Carlo R. Contaldi - Canadian Institute for Theoretical Astrophysics
Rod D. Davies - SKA Observatory
Richard J. Davis - Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL
Clive Dickinson - SKA Observatory
Ricardo Genova-Santos - Instituto de Astrofísica de Canarias
Keith Grainge - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Yaser A. Hafez - Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL
Michael P. Hobson - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Michael E. Jones - Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Rüdiger Kneissl - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Katy Lancaster - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Anthony Lasenby - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Brian S. Mason - 7NRAO, PO Box 2, Green Bank, WV 24944, USA
Timothy J. Pearson - California Institute of Technology
Guy G. Pooley - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Anthony C. S. Readhead - California Institute of Technology
Rafael Rebolo - Instituto de Astrofísica de Canarias
Graca Rocha - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
José Alberto Rubiño-Martin - Instituto de Astrofísica de Canarias
Richard D. E. Saunders - Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Richard S. Savage - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Anna Scaife - Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Paul F. Scott - Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Jonathan L. Sievers - Canadian Institute for Theoretical Astrophysics
Anže Slosar - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Angela C. Taylor - Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
David Titterington - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Elizabeth Waldram - 1Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE
Robert A. Watson - Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL
Althea Wilkinson - SKA Observatory
Publication Details: Monthly notices of the Royal Astronomical Society, Vol.363(4), pp.1125-1135
Publisher: Blackwell Science Ltd
Identifiers: 9918654008331
Academic Unit: King Abdulaziz City for Science & Technology
Language: English
Resource Type: Journal article