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Redundant Calibration: breaking the constraints of limited sky information

Published online by Cambridge University Press:  08 May 2018

Ronniy C. Joseph Open the ORCID record for Ronniy C. Joseph [Opens in a new window]
Ronniy C. Joseph*
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia. email: ronniy.joseph@icrar.org ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW, Australia ARC Centre of Excellence for All Sky Astrophysics in 3D (ASTRO 3D), Perth, WA 6845
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Abstract

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The latest generation of low frequency radio interferometers, e.g. LOFAR, MWA, PAPER, has been pushing down the detection limits on the hydrogen signal from the Epoch of Reionisation. However, due to the challenges posed by foregrounds and instrumental systematics the signal has eluded detection thus far. To overcome these challenges we require a detailed understanding of the calibration of these relatively new telescopes. This led to a renewed interest in redundant calibration. Classical calibration schemes depend on sky models based on limited knowledge of the low frequency sky. Redundant calibration, however, allows us to escape our ignorance as it is sky model independent. We will review the field of redundant calibration, and present work we have undertaken to understand the limitations of this calibration method.

Keywords

instrumentation: interferometersmethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 118 - 121
Copyright
Copyright © International Astronomical Union 2018 

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