Arthur Corstanje

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Cosmic rays are the highest-energy particles found in nature. Measurements of the mass composition of cosmic rays with energies of 10(17)-10(18) electronvolts are essential to understanding whether they have galactic or extragalactic sources. It has also been proposed that the astrophysical neutrino signal comes from accelerators capable of producing cosmic(More)
We present measurements of radio emission from cosmic ray air showers that took place during thunderstorms. The intensity and polarization patterns of these air showers are radically different from those measured during fair-weather conditions. With the use of a simple two-layer model for the atmospheric electric field, these patterns can be well reproduced(More)
The pattern of the radio emission of air showers is finely sampled with the LowFrequency ARray (LOFAR). A set of 382 measured air showers is used to test a fast, analytic parameterization of the distribution of pulse powers. Using this parameterization we are able to reconstruct the shower axis and give estimators for the energy of the air shower as well as(More)
We present LOFAR measurements of radio emission from extensive air showers. We find that this emission is strongly polarized, with a median degree of polarization of nearly 99%, and that the angle between the polarization direction of the electric field and the Lorentz force acting on the particles, depends on the observer location in the shower plane. This(More)
1 ar X iv :1 41 1. 68 65 v1 [ as tr oph .I M ] 2 5 N ov 2 01 4 Measuring radio emission from air showers offers a novel way to determine properties of the primary cosmic rays such as their mass and energy. Theory predicts that relativistic time compression effects lead to a ring of amplified emission which starts to dominate the emission pattern for(More)
We present measured radio emission from cosmic-ray-induced air showers under thunderstorm conditions. We observe for these events large differences in intensity, linear polarization and circular polarization from the events measured under fair-weather conditions. This can be explained by the effects of atmospheric electric fields in thunderclouds.(More)
We present the results of a four-month campaign searching for low-frequency radio transients near the North Celestial Pole with the Low-Frequency Array (LOFAR), as part of the Multifrequency Snapshot Sky Survey (MSSS). The data were recorded between 2011 December and 2012 April and comprised 2149 11-minute snapshots, each covering 175 deg. We have found one(More)
s. buitink, A. Corstanje, H. Falcke, J. R. Hörandel, T. Huege, A. Nelles, J. p. Rachen, L. Rossetto, p. schellart, O. scholten, s. ter Veen, s. Thoudam, T. N. G. Trinh, J. Anderson, A. Asgekar, I. m. Avruch, m. E. bell, m. J. bentum, G. bernardi, p. best, A. bonafede, F. breitling, J. W. broderick, W. N. brouw, m. brüggen, H. R. butcher, D. Carbone, b.(More)
Ultra-high-energy neutrinos and cosmic rays produce short radio flashes through the Askaryan effect when they impact on the Moon. Earthbound radio telescopes can search the Lunar surface for these signals. A new generation of lowfrequency, digital radio arrays, spearheaded by LOFAR, will allow for searches with unprecedented sensitivity. In the first stage(More)
T. N. G. Trinh, O. Scholten, A. Bonardi, S. Buitink, A. Corstanje, U. Ebert, J. E. Enriquez, H. Falcke, J. R. Hörandel, B.M. Hare, P. Mitra, K. Mulrey, A. Nelles, J. P. Rachen, L. Rossetto, C. Rutjes, P. Schellart, S. Thoudam, S. ter Veen, and T. Winchen KVI-Center for Advanced Radiation Technology, University Groningen, P.O. Box 72, 9700 AB Groningen, The(More)