Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/238038

Title

Fast Holographic Deconvolution: a new technique for precision radio interferometry

Author(s)

Sullivan, I. S.;  Morales, M. F.;  Hazelton, B. J.;  Arcus, W.;  Barnes, D.;  Bernardi, G.;  Briggs, F. H.;  Bowman, J. D.;  Bunton, J. D.;  Cappallo, R. J.;  Corey, B. E.;  Deshpande, A.;  Desouza, L.;  Emrich, D.;  Gaensler, B. M.;  Goeke, R.;  Greenhill, L. J.;  Herne, D.;  Hewitt, J. N.;  Johnston-Hollitt, M.;  Kaplan, D. L.;  Kasper, J. C.;  Kincaid, B. B.;  Koenig, R.;  Kratzenberg, E.;  Lonsdale, C. J.;  Lynch, M. J.;  McWhirter, S. R.;  Mitchell, D. A.;  Morgan, E.;  Oberoi, D.;  Ord, S. M.;  Pathikulangara, J.;  Prabu, T.;  Remillard, R. A.;  Rogers, A. E. E.;  Roshi, A.;  Salah, J. E.;  Sault, R. J.;  Shankar, N. U.;  Srivani, K. S.;  Stevens, J.;  Subrahmanyan, R.;  Tingay, S. J.;  Wayth, R. B.;  Waterson, M.;  Webster, R. L.;  Whitney, A. R.;  Williams, A.;  Williams, C. L.;  Wyithe, J. S. B.

Abstract

We introduce the Fast Holographic Deconvolution method for analyzing interferometric radio data. Our new method is an extension of A-projection/software-holography/forward modeling analysis techniques and shares their precision deconvolution and wide-field polarimetry, while being significantly faster than current implementations that use full direction-dependent antenna gains. Using data from the MWA 32 antenna prototype, we demonstrate the effectiveness and precision of our new algorithm. Fast Holographic Deconvolution may be particularly important for upcoming 21cm cosmology observations of the Epoch of Reionization and Dark Energy where foreground subtraction is intimately related to the precision of the data reduction.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

Astrophysical Journal, Vol. 759, no. 1 (Nov 2012), article no. 17

Publication year

2012

FOR Code(s)

0201 Astronomical and Space Sciences;  0305 Organic Chemistry;  0306 Physical Chemistry (Incl. Structural)

Keyword(s)

Dark ages;  First stars;  Image processing techniques;  Interferometric techniques;  Reionization

Publisher

Institute of Physics Publishing

ISSN

0004-637X

Publisher URL

http://dx.doi.org/10.1088/0004-637x/759/1/17

Copyright

Copyright © 2012 The American Astronomical Society. All rights reserved. The American Astronomical Society does not allow institutions to archive either the accepted manuscript or the published version of the article. However, you can find an earlier version of the full text here: http://arxiv.org/abs/1209.1653

Peer reviewed