Cosmic ray energy reconstruction from the S(500) observable recorded in the KASCADE-Grande air shower experiment

The energy reconstruction at KASCADE-Grande is based on a combination of the shower size and the total muon number, which are both estimated for each individual air shower event. We present investigations where we employed a second method to reconstruct the primary energy using S(500), which are the...

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Bibliographic Details
Published in:Astroparticle physics 2016-04, Vol.77, p.21-31
Main Authors: Apel, W.D., Arteaga-Velázquez, J.C., Bekk, K., Bertaina, M., Blümer, J., Bozdog, H., Brancus, I.M., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Fuhrmann, D., Gherghel-Lascu, A., Gils, H.J., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Huber, D., Huege, T., Kampert, K.-H., Kang, D., Klages, H.O., Link, K., Łuczak, P., Mathes, H.J., Mayer, H.J., Milke, J., Mitrica, B., Morello, C., Oehlschläger, J., Ostapchenko, S., Palmieri, N., Petcu, M., Pierog, T., Rebel, H., Roth, M., Schieler, H., Schoo, S., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Ulrich, H., Weindl, A., Wochele, J., Zabierowski, J.
Format: Article
Language:English
Subjects:
Air showers
Attenuation
Calibration
Constants
Cosmic ray
Energy use
Hadronic interaction model
KASCADE-Grande
Primary energy
Reconstruction
Showers
Simulation
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Summary:The energy reconstruction at KASCADE-Grande is based on a combination of the shower size and the total muon number, which are both estimated for each individual air shower event. We present investigations where we employed a second method to reconstruct the primary energy using S(500), which are the charged particle densities inferred with the KASCADE-Grande detector at a distance of 500 m from the shower axis. We considered the attenuation of inclined showers by applying the “Constant Intensity Cut” method and we employed a simulation-derived calibration to convert the recorded S(500) into primary energy. We observed a systematic shift in the S(500)-derived energy compared with previously reported results obtained using the standard reconstruction technique. However, a comparison of the two methods based on simulated and measured data showed that this shift only appeared in the measured data. Our investigations showed that this shift was caused mainly by the inadequate description of the shape of the lateral density distribution in the simulations.
ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2015.12.002