Fast Holographic Deconvolution: a new technique for precision radio interferometry

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 widefield 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 21 cm cosmology observations of the Epoch of Reionization and Dark Energy where foreground subtraction is intimately related to the precision of the data reduction.

ApJ accepted

References in corpus (16)

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Cited by in corpus (73)

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• Redundant Array Configurations for 21 cm Cosmology
• The Murchison Widefield Array 21 cm Power Spectrum Analysis Methodology
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• Dual Polarization Measurements of MWA Beampatterns at 137 MHz
• An Efficient Feedback Calibration Algorithm for Direct Imaging Radio Telescopes
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• Direct Optimal Mapping for 21cm Cosmology: A Demonstration with the Hydrogen Epoch of Reionization Array
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