Fast Holographic Deconvolution: A new technique for precision radio interferometry

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

Research output: Contribution to journalArticle

47 Scopus citations

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.

Original languageEnglish (US)
Article number17
JournalAstrophysical Journal
Volume759
Issue number1
DOIs
StatePublished - Nov 1 2012

Keywords

  • dark ages, reionization, first stars
  • techniques: image processing
  • techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Sullivan, I. S., Morales, M. F., Hazelton, B. J., Arcus, W., Barnes, D., Bernardi, G., Briggs, F. H., Bowman, J., 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., ... Wyithe, J. S. B. (2012). Fast Holographic Deconvolution: A new technique for precision radio interferometry. Astrophysical Journal, 759(1), [17]. https://doi.org/10.1088/0004-637X/759/1/17