Journal article
Fast Holographic Deconvolution: A new technique for precision radio interferometry
IS Sullivan, MF Morales, BJ Hazelton, W Arcus, D Barnes, G Bernardi, FH Briggs, JD Bowman, JD Bunton, RJ Cappallo, BE Corey, A Deshpande, L Desouza, D Emrich, BM Gaensler, R Goeke, LJ Greenhill, D Herne, JN Hewitt, M Johnston-Hollitt Show all
Astrophysical Journal | Published : 2012
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..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
Support for this work came from the U.S. National Science Foundation (grants AST CAREER-0847753, AST-1003314, AST-0457585, AST-1008353, AST-0908884, and PHY-0835713), the Australian Research Council (grants LE0775621 and LE0882938), the U.S. Air Force Office of Scientific Research (grant FA9550-0510247), the Smithsonian Astrophysical Observatory, the MIT School of Science, the Raman Research Institute, the Australian National University, the iVEC Petabyte Data Store, the Initiative in Innovative Computing and NVIDIA sponsored Center for Excellence at Harvard, and the International Centre for Radio Astronomy Research, a Joint Venture of Curtin University of Technology and The University of Western Australia, funded by the Western Australian State government.