Abstract

Using data measured by the KASCADE-Grande air shower array, an upper limit to the flux of ultra-high energy gamma-rays in the primary cosmic-ray flux is determined. KASCADE-Grande measures the electromagnetic and muonic components for individual air showers in the energy range from 10 PeV up to 1 EeV. The analysis is performed by selecting air showers with low muon contents. A preliminary result on the 90% C.L. upper limit to the relative intensity of gamma-ray with respect to cosmic ray primaries is presented and compared with limits reported by other measurements.

Highlights

  • The flux of diffuse gamma rays and its spectrum is a very interesting topic in astrophysics

  • Extensive air showers are mainly characterized by the total electron number and the total muon number

  • The limits presented here represent the first results in the energy range above 5 × 1016 eV

Read more

Summary

PDF hosted at the Radboud Repository of the Radboud University Nijmegen

The following full text is a publisher's version. For additional information about this publication click this link. http://hdl.handle.net/2066/150841. For additional information about this publication click this link. D Kang, W D Apel, J C Arteaga-Velazquez, K Bekk, M Bertaina, J Blumer, H Bozdog, I M Brancus, E Cantoni4,6,a, A Chiavassa, F Cossavella1,b, K Daumiller, V de Souza, F Di Pierro, P Doll, R Engel, Z Feng, D Fuhrmann9,c, A Gherghel-Lascu, H J Gils, R Glasstetter, C Grupen, A Haungs, D Heck, J R Horandel, D Huber, T Huege, K H Kampert, H O Klages, K Link, P Luczak, H J Mathes, H J Mayer, J Milke, B Mitrica, C Morello, J Oehlschlager, S Ostapchenko, N Palmieri, M Petcu, T Pierog, H Rebel, M Roth, H Schieler, S Schoo, F Schroder, O Sima, G Toma, G C Trinchero, H Ulrich, A Weindl, J Wochele, J Zabierowski

Introduction
ICR Ntotεγ Eγ
Conclusion

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.