ICRC2015

Session

Parallel CR17 EAS spec

4 Aug 2015, 14:00

World Forum

916. Recent Results on Cosmic Ray Physics with the IceCube Observatory

Timo Karg (DESY)

04/08/2015, 14:00

CR-EX

Oral contribution

795. Latest Results on Cosmic Ray Spectrum and Composition from Three Years of IceTop and IceCube

Katherine Rawlins (University of Alaska Anchorage)

04/08/2015, 14:30

CR-EX

Oral contribution

With the IceTop detector at the South Pole, a spectrum of cosmic ray air shower size $S_{125}$ can be unfolded into an energy spectrum of primary cosmic rays. When the IceTop data is analyzed in coincidence with high-energy muon energy loss information from the deep IceCube detector, both the spectrum and mass composition of primary cosmic rays can be extracted using a neural network. Both of...

380. The flux of ultra-high energy cosmic rays after ten years of operation of the Pierre Auger Observatory

Dr Inés Valiño (University of Santiago de Compostela)

04/08/2015, 14:45

CR-EX

Oral contribution

The flux of cosmic rays has been measured with unprecedented precision and statistics at the Pierre Auger Observatory. We report an update of the all-sky flux of cosmic rays above $3\times {10}^{17}$ eV obtained by combining four independent data sets. These measurements are based on data from the surface detector (divided into two sets according to the shower zenith angle), from a nested...

847. TA Spectrum Summary

Dmitri Ivanov (University of Utah)

04/08/2015, 15:00

CR-EX

Oral contribution

The Telescope Array (TA) covers an energy range from 4 PeV to over 100 EeV. TA is a hybrid detector that uses air fluorescence detectors (FD) combined with a ground array. In May 2015, TA will have collected 7 years of data. The TA low energy extension (TALE), which sees cosmic rays down to 4 PeV, consists of additional fluorescence telescopes at one of the TA FD stations. An infill array of...

299. Interpretation of the energy spectrum observed with the Telescope Array surface detectors

Eiji Kido

04/08/2015, 15:15

CR-EX

Oral contribution

We present the latest energy spectrum of ultra-high-energy cosmic rays (UHECRs) with energy E > ${10}^{18.2}$ eV observed by the surface detectors of the Telescope Array experiment. The broken power law to the spectrum contains two break points, a flattening known as the "ankle" or "dip" at E = ${10}^{18.70}$ eV, and a steepening at E = ${10}^{19.75}$ eV. These spectral features are related to the...

382. Ultra-high-energy cosmic ray flux and energy measurement with ANITA

Harm Schoorlemmer (University of Hawaii)

04/08/2015, 15:30

CR-EX

Oral contribution

The first flight of the Antarctic Impulse Transient Antenna (ANITA) experiment recorded 16 radio signals that were emitted by cosmic ray induced air showers. Recent developments in simulation packages made it possible to estimate the cosmic ray energy from these observations. In this talk we introduce a novel method to estimate the cosmic ray energy and apply it to the observations. We...

654. The origin of the ankle in the UHECR spectrum, and of the extragalactic protons below it

Prof. Glennys Farrar (New York University)

04/08/2015, 15:45

CR-TH

Oral contribution

The sharp change in slope of the ultra-high energy cosmic ray spectrum around 10^18.6 eV (the ankle), combined with evidence of a light but extragalactic component near and below the ankle and intermediate composition above, has proved exceedingly challenging to understand theoretically. We propose a mechanism whereby photo-disintegration of ultra-high energy nuclei in the region...