KASCADE-Grande Limits on the Isotropic Diffuse Gamma-Ray Flux between 100 TeV and 1 EeV
Abstract
KASCADE and KASCADE-Grande were multi-detector installations to measure individual air showers of cosmic rays at ultra-high energy. Based on data sets measured by KASCADE and KASCADE-Grande, 90% C.L. upper limits to the flux of gamma-rays in the primary cosmic ray flux are determined in an energy range of eV. The analysis is performed by selecting air showers with a low muon content as expected for gamma-ray-induced showers compared to air showers induced by energetic nuclei. The best upper limit of the fraction of gamma-rays to the total cosmic ray flux is obtained at eV with . Translated to an absolute gamma-ray flux this sets constraints on some fundamental astrophysical models, such as the distance of sources for at least one of the IceCube neutrino excess models.
Keywords
Cite
@article{arxiv.1710.02889,
title = {KASCADE-Grande Limits on the Isotropic Diffuse Gamma-Ray Flux between 100 TeV and 1 EeV},
author = {Grande Collaboration and W. D. Apel and J. C. Arteaga-Velázquez and K. Bekk and M. Bertaina and J. Blümer and H. Bozdog and I. M. Brancus and E. Cantoni and A. Chiavassa and F. Cossavella and K. Daumiller and V. de Souza and F. Di Pierro and P. Doll and R. Engel and Z. Feng and D. Fuhrmann and A. Gherghel-Lascu and H. J. Gils and R. Glasstetter and C. Grupen and A. Haungs and D. Heck and J. R. Hörandel and T. Huege and K. -H. Kampert and D. Kang and H. O. Klages and K. Link and P. Łuczak and H. J. Mathes and H. J. Mayer and J. Milke and B. Mitrica and C. Morello and J. Oehlschläger and S. Ostapchenko and T. Pierog and H. Rebel and M. Roth and H. Schieler and S. Schoo and F. G. Schröder and O. Sima and G. Toma and G. C. Trinchero and H. Ulrich and A. Weindl and J. Wochele and J. Zabierowski},
journal= {arXiv preprint arXiv:1710.02889},
year = {2017}
}
Comments
Published in The Astrophysical Journal, Volume 848, Number 1. Posted on: October 5, 2017