159 citations · 1.1k across the 18 of their papers we have counts for
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Robust Radio Interferometric Calibration Using the t-Distribution
S. Kazemi, S. Yatawatta
A major stage of radio interferometric data processing is calibration or the estimation of systematic errors in the data and the correction for such errors. A stochastic error (noi…
Radio Interferometric Calibration via Ordered-Subsets Algorithms: OS-LS and OS-SAGE calibrations
S. Kazemi, S. Yatawatta, S. Zaroubi
The main objective of this work is to accelerate the Maximum-Likelihood (ML) estimation procedure in radio interferometric calibration. We introduce the OS-LS and the OS-SAGE radio…
Probing reionization with LOFAR using 21-cm redshift space distortions
Hannes Jensen, Kanan K. Datta, Garrelt Mellema +24
One of the most promising ways to study the epoch of reionization (EoR) is through radio observations of the redshifted 21-cm line emission from neutral hydrogen. These observation…
Initial deep LOFAR observations of Epoch of Reionization windows: I. The North Celestial Pole
S. Yatawatta, A. G. de Bruyn, M. A. Brentjens +86
The aim of the LOFAR Epoch of Reionization (EoR) project is to detect the spectral fluctuations of the redshifted HI 21cm signal. This signal is weaker by several orders of magnitu…
Clustered Calibration: An Improvement to Radio Interferometric Direction Dependent Self-Calibration
Sanaz Kazemi, Sarod Yatawatta, Saleem Zaroubi
The new generation of radio synthesis arrays, such as LOFAR and SKA, have been designed to surpass existing arrays in terms of sensitivity, angular resolution and frequency coverag…