BL Lacertae are probable sources of the observed ultrahigh energy cosmic rays

Ultrahigh Energy Cosmic Rays Detection

The paper describes methods used for the detection of cosmic rays with energies above 1018 eV (UHECR, UltraHigh Energy Cosmic Rays). It had been anticipated there would be a cutoff in the energy spectrum of primary cosmic rays around 3·1019 eV induced by their interaction with the 2.7 K primordial photons. This has become known as the GZK cutoff. However, several showers have been detected with...

Detailed analysis of observed antiprotons in cosmic rays

In the present work, the origin of antiprotons observed in cosmic rays (above the atmosphere) is analyzed in details. We have considered the origin of the primaries, (which their interactions with the interstellar medium is one of the most important sources of antiprotons) is a supernova type II then used a diffusion model for their propagation. We have used the latest parameterization for anti...

Search for cross-correlations of ultra–high-energy cosmic rays with BL Lacertae objects

The High Resolution Fly’s Eye (HiRes) experiment is a stereo air fluorescence detector for the study of cosmic rays with energies above 5×10 eV. Arrival directions of cosmic rays observed in stereo can be resolved with a typical uncertainty on the order of 0.5◦, making the experiment ideal for small-scale anisotropy studies. Here we present the results of searches for correlation with astronomi...

Are ultrahigh energy cosmic rays signals of supersymmetry?

A Cluster of Ultrahigh Energy Cosmic Rays

Five ultrahigh energy cosmic rays in the combined AGASA and HiRes stereo data are analyzed to test whether they come from a single source. The quad above 37 EeV in the 94-event high energy dataset can be analyzed without considering magnetic dispersion. The probability that it is a chance association is 10. Assuming the source is continuous, the random magnetic deflections these UHECRs accumula...