Publications (7)
Scaling slowly rotating asteroids by stellar occultations
A. Marciniak, J. Äurech, A. Choukroun +176
As evidenced by recent survey results, majority of asteroids are slow rotators (P>12 h), but lack spin and shape models due to selection bias. This bias is skewing our overall unde…
Measurement of the Flux of Ultra High Energy Cosmic Rays by the Stereo Technique
R. U. Abbasi, T. Abu-Zayyad, M. Al-Seady +60
The High Resolution Fly's Eye experiment has measured the flux of ultrahigh energy cosmic rays using the stereoscopic air fluorescence technique. The HiRes experiment consists of t…
Air fluorescence measurements in the spectral range 300-420 nm using a 28.5 GeV electron beam
R. Abbasi, T. Abu-Zayyad, K. Belov +34
Measurements are reported of the yield and spectrum of fluorescence, excited by a 28.5 GeV electron beam, in air at a range of pressures of interest to ultra-high energy cosmic ray…
Indications of Proton-Dominated Cosmic Ray Composition above 1.6 EeV
R. U. Abbasi, T. Abu-Zayyad, M. Al-Seady +57
We report studies of ultra-high energy cosmic ray composition via analysis of depth of airshower maximum (Xmax), for airshower events collected by the High Resolution Fly's Eye (Hi…
An upper limit on the electron-neutrino flux from the HiRes detector
R. U. Abbasi, T. Abu-Zayyad, M. Allen +64
Air-fluorescence detectors such as the High Resolution Fly's Eye (HiRes) detector are very sensitive to upward-going, Earth-skimming ultrahigh energy electron-neutrino-induced show…
Search for Correlations between HiRes Stereo Events and Active Galactic Nuclei
R. U. Abbasi, T. Abu-Zayyad, M. Allen +61
We have searched for correlations between the pointing directions of ultrahigh energy cosmic rays observed by the High Resolution Fly's Eye experiment and Active Galactic Nuclei (A…
Analysis of large-scale anisotropy of ultra-high energy cosmic rays in HiRes data
R. U. Abbasi, T. Abu-Zayyad, M. Allen +59
Stereo data collected by the HiRes experiment over a six year period are examined for large-scale anisotropy related to the inhomogeneous distribution of matter in the nearby Unive…