EPJ Web Conf.
Volume 135, 20177th International Conference on Acoustic and Radio EeV Neutrino Detection Activities (ARENA 2016)
|Number of page(s)||6|
|Section||Radio Detection of Extensive Air Showers|
|Published online||15 March 2017|
Cosmic Ray Mass Measurements with LOFAR
1 Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, ( Belgium )
2 Department of Astrophysics/IMAPP, Radboud University, P.O. Box 9010, 6500 GL Nijmegen, ( the Netherlands )
3 Astron, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, ( The Netherlands )
4 Nikhef, Science Park 105, 1098 XG Amsterdam, ( The Netherlands )
5 University of California Irvine, Irvine, CA 92697, ( USA )
6 KVI-CART, Zernikelaan 25, 9747 AA Groningen, ( The Netherlands )
7 University of Groningen, Zernikelaan 25, 9747 AA Groningen, ( The Netherlands )
* e-mail: Stijn.Buitink@vub.ac.be
Published online: 15 March 2017
In the dense core of LOFAR individual air showers are detected by hundreds of dipole antennas simultaneously. We reconstruct Xmax by using a hybrid technique that combines a two-dimensional fit of the radio profile to CoREAS simulations and a one-dimensional fit of the particle density distribution. For high-quality detections, the statistical uncertainty on Xmax is smaller than 20 g/cm2. We present results of cosmic-ray mass analysis in the energy regime of 1017 - 1017.5 eV. This range is of particular interest as it may harbor the transition from a Galactic to an extragalactic origin of cosmic rays.
© The Authors, published by EDP Sciences, 2017
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