307 citations · 5.5k across the 80 of their papers we have counts for
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WSRT Faraday tomography of the Galactic ISM at λ~ 0.86 m
D. H. F. M. Schnitzeler, P. Katgert, A. G. de Bruyn
We investigate the properties of the Galactic ISM by applying Faraday tomography to a radio polarization data set in the direction of the Galactic anti-centre. We address the probl…
WSRT Faraday tomography of the Galactic ISM at λ\sim 0.86 m
D. H. F. M. Schnitzeler, P. Katgert, A. G. de Bruyn
We investigate the distribution and properties of Faraday rotating and synchrotron emitting regions in the Galactic ISM in the direction of the Galactic anti-centre. We apply Farad…
Radio emission of highly inclined cosmic ray air showers measured with LOPES
Jelena Petrovic LOPES collaboration
LOPES-10 (the first phase of LOPES, consisting of 10 antennas) detected a significant number of cosmic ray air showers with a zenith angle larger than 50, and many of the…
Detecting UHE Cosmics & Neutrinos off the Moon; an Optimal Radio Window
O. Scholten, J. Bacelar, R. Braun +4
We show that at wavelengths comparable to the length of the shower produced by an Ultra-High Energy cosmic ray or neutrino, radio signals are an extremely efficient way to detect t…
Absolute calibration of the LOPES antenna system
S. Nehls, LOPES Collaboration
Radio emission in extensive air showers arises from an interaction with the geomagnetic field and is subject of theoretical studies. This radio emission has advantages for the dete…
Combined LOPES and KASCADE-Grande Data Analysis
A. Haungs, LOPES Collaboration
First analyses of coincident data of the LOPES (LOfar PrototypE Station) radio antennas with the particle air shower experiment KASCADE-Grande show basic correlations in the observ…
Fluctuations in the EAS radio signal derived with improved Monte Carlo simulations based on CORSIKA
Tim Huege
Cosmic ray air showers are known to emit pulsed radio emission which can be understood as coherent geosynchrotron radiation arising from the deflection of electron-positron pairs i…
Galactic magnetic fields, from radio polarimetry of the WIM
M. Haverkorn, P. Katgert, A. G. de Bruyn +1
Multi-frequency radio polarimetry of the diffuse Galactic synchrotron background gives new viewpoints on the Galactic magnetic field. Rotation measure maps reveal magnetic structur…
LOFAR: A new radio telescope for low frequency radio observations: Science and project status
H. Rottgering, A. G. de Bruyn, R. P. Fender +4
LOFAR, the Low Frequency Array, is a large radio telescope consisting about 100 soccer field sized antenna stations spread over a region of 400 km in diameter. It will operate in t…
Characteristics of the structure in the Galactic polarized radio background at 350 MHz
M. Haverkorn, P. Katgert, A. G. de Bruyn
Angular power spectra and structure functions of the Stokes parameters Q and U and polarized intensity P are derived from three sets of radio polarimetric observations. Two of the…
Multi-frequency polarimetry of the Galactic radio background around 350 MHz: I. A region in Auriga around l = 161, b = 16
Marijke Haverkorn, Peter Katgert, Ger de Bruyn
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) = (16…
Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics
K. -H. Chae, A. D. Biggs, R. D. Blandford +20
We derive constraints on cosmological parameters and the properties of the lensing galaxies from gravitational lens statistics based on the final Cosmic Lens All Sky Survey (CLASS)…
Interstellar scintillation as the origin of rapid radio variability in the quasar J1819+3845
J. Dennett-Thorpe, A. G. de Bruyn
Quasars shine brightly due to the liberation of gravitational energy as matter falls onto a supermassive black hole in the centre of a galaxy. Variations in the radiation received…
Parsec-scale structure in the warm ISM from polarized galactic radio background observations
M. Haverkorn, P. Katgert, A. G. de Bruyn
We present multi-frequency polarization observations of the diffuse radio synchrotron background modulated by Faraday rotation, in two directions of positive latitude. No extended…
A new sample of giant radio galaxies from the WENSS survey: I - Sample definition, selection effects and first results
A. P. Schoenmakers, A. G. de Bruyn, H. J. A. Rottgering +1
We have used the Westerbork Northern Sky Survey (WENSS) to define a sample of 47 low redshift (z < 0.4) giant radio galaxies. This is the largest sample yet of such radio sources o…
The new two-image gravitational lens system CLASS B2319+051
D. Rusin, D. R. Marlow, M. Norbury +10
We report the discovery of a new two-image gravitational lens system from the Cosmic Lens All-Sky Survey, CLASS B2319+051. Radio imaging with the Very Large Array (VLA) and Multi-E…
Cold Gas Kinematics in an L* Spiral Galaxy at z=0.437: The Nature of Damped Lyman-alpha Absorbers
F. H. Briggs, A. G. de Bruyn, R. C. Vermeulen
Westerbork Radio Synthesis Telescope observations of the redshifted 21cm line absorber against the z_em = 0.871 double lobed quasar 3C196 show that the intervening absorber is an L…
Astronomical Constraints on the Cosmic Evolution of the Fine Structure Constant and Possible Quantum Dimensions
C. L. Carilli, K. M. Menten, J. T. Stocke +6
We present measurements of absorption by the 21cm hyperfine transition of neutral hydrogen toward radio sources at substantial look-back times. These data are used in combination w…
A New Quadruple Gravitational Lens System: CLASS B0128+437
P. M. Phillips, M. A. Norbury, L. V. E. Koopmans +15
High resolution MERLIN observations of a newly-discovered four-image gravitational lens system, B0128+437, are presented. The system was found after a careful re-analysis of the en…
A new sample of giant radio galaxies from the WENSS survey II - A multi-frequency radio study of a complete sample: Properties of the radio lobes and their environment
A. P. Schoenmakers, K. -H. Mack, A. G. de Bruyn +3
We have formed a complete sample of 26 low redshift (z < 0.3) giant radio galaxies (GRGs) from the WENSS survey, selected at flux densities above 1 Jy at 325 MHz. We present 10.5-G…
CLASS B0739+366: A new two-image gravitational lens system
D. R. Marlow, D. Rusin, M. Norbury +10
We present the discovery of CLASS B0739+366, a new gravitational lens system from the Cosmic Lens All-Sky Survey. Radio imaging of the source with the Very Large Array (VLA) shows…
The discovery of a microarcsecond quasar: J1819+3845
J. Dennett-Thorpe, A. G. de Bruyn
We report on the discovery of a source which exhibits over 300% amplitude changes in radio flux density on the period of hours. This source, J1819+3845, is the most extremely varia…
The radio source B 1834+620: A double-double radio galaxy with interesting properties
Arno P. Schoenmakers, A. G. de Bruyn, H. J. A. Rottgering +1
We present a study of the peculiar radio galaxy B 1834+620. It is characterised by the presence of a 420-kpc large edge-brightened radio source which is situated within, and well a…
Radio galaxies with a `double-double' morphology: I - Analysis of the radio properties and evidence for interrupted activity in active galactic nuclei
Arno P. Schoenmakers, A. G. de Bruyn, H. J. A. Rottgering +2
We present four Mpc-sized radio galaxies which consist of a pair of double-lobed radio sources, aligned along the same axis, and with a coinciding radio core. We have called these…