Labropoulos, Panagiotis, Koopmans, Leon V. E., Jelic, Vibor, Yatawatta, Sarod, Thomas, Rajat M., Bernardi, Gianni, ...
A number of experiments are set to measure the 21-cm signal of neutral hydrogen from the Epoch of Reionization (EoR). The common denominator of these experiments are the large data sets produced,...
Radio Interferometric Calibration Using The SAGE Algorithm (2008)
Yatawatta, Sarod, Zaroubi, Saleem, De Bruyn, Ger, Koopmans, Leon, Noordam, Jan
Radio Interferometry is an essential method for astronomical observations. Self-calibration techniques have increased the quality of the radio astronomical observations (and hence the science) by...
Extremely Anisotropic Scintillations (2008)
Walker, Mark, De Bruyn, Ger, Bignall, Hayley
A small number of quasars exhibit interstellar scintillation on time-scales less than an hour; their scintillation patterns are all known to be anisotropic. Here we consider a totally anisotropic...
Foreground simulations for the LOFAR - Epoch of Reionization Experiment (2008)
Jelic, Vibor, Zaroubi, Saleem, Labropoulos, Panagiotis, Thomas, Rajat M., Bernardi, Gianni, Brentjens, Michiel A., ...
Future high redshift 21-cm experiments will suffer from a high degree of contamination, due both to astrophysical foregrounds and to non-astrophysical and instrumental effects. In order to reliably...
Macquart, Jean-Pierre, De Bruyn, Ger
The 4.8 GHz lightcurves of the scintillating intra-day variable quasar J1819+3845 during 2004-5 exhibit sharp structure, down to a time scale of 15 minutes, that was absent from lightcurves taken...
Diffractive Interstellar Scintillation of the Quasar J1819+3845 at 21cm (2005)
Macquart, Jean-Pierre, De Bruyn, Ger
We report the discovery of fast, frequency-dependent intensity variations from the scintillating intra-day variable quasar J1819+3845 at a wavelength of 21cm which resemble diffractive interstellar...
Haverkorn, Marijke, Katgert, Peter, De Bruyn, Ger
With the Westerbork Synthesis Radio Telescope (WSRT), multi-frequency polarimetric images were taken of the diffuse radio synchrotron background in a region centered on (l,b) = (161,16). The...
On the evolution of young radio-loud AGN (2000)
Snellen, Ignas, Schilizzi, Richard, Miley, George, De Bruyn, Ger, Bremer, Malcolm, Rottgering, Huub
This paper describes an investigation of the early evolution of extragalactic radio sources using samples of faint and bright Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio...