# TeVPA 2018

Aug 27 – 31, 2018
LVH, Luisenstraße 58, 10117 Berlin
Europe/Berlin timezone

## Cosmic ray spectrum and mass composition from IceTop and IceCube

Aug 28, 2018, 2:45 PM
15m
-4- Robert Koch

Talk Cosmic Rays

### Speaker

Dr Matthias Plum (Marquette University)

### Description

IceTop is the surface component of the IceCube Observatory at the South pole and consists of ice-cherenkov detector stations at the top of IceCube's strings. The air shower data are analyzed to study the cosmic ray spectrum and composition in the energy range from PeV to EeV. The shower size $S_{125}$ from IceTop alone can be used as a proxy for estimating the primary energy, and unfolded with certain additional assumptions into an all-particle spectrum. In addition, the surface information can be combined with high-energy muon energy loss information for mass separation from the deep IceCube detector for those air showers which pass through both. In a complementary analysis using these coincident events, both the spectrum and mass composition of primary cosmic rays has been extracted using a multivariate analysis. Both of these analyses have been performed on three years of IceTop and IceCube data. The all-particle spectra as well as individual spectra for elemental groups will be presented.

### Primary author

Dr Matthias Plum (Marquette University)

 Slides