Paul Sommers

Professor, University of Utah

Ph.D., University of Texas, Austin, 1973
 
Contact Information
Phone: (801) 581-6203
Email: sommersphysics.utah.edu
WWW: Web Site
 
Research
The Auger Observatory attacks fundamental puzzles posed by high energy cosmic rays.
The highest energy cosmic rays pose some intriguing puzzles: How do they get their energies? Why do their arrival directions not point to special astrophysical objects? Why is the spectrum not terminated near 6x1019 eV by particle collisions with the cosmic microwave radiation? The Auger Project is an ambitious international effort to resolve these questions.

Ongoing Scientific Projects:
 
KICP Publications
2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2004


Latest Journal Publications
  1. "Calibration of the logarithmic-periodic dipole antenna (LPDA) radio stations at the Pierre Auger Observatory using an octocopter", Journal of Instrumentation, Volume 12, Issue 10, pp. T10005 (2017) (Oct 2017)
  2. "Spectral calibration of the fluorescence telescopes of the Pierre Auger Observatory", Astroparticle Physics, Volume 95, p. 44-56 (Oct 2017)
  3. "Search for High-energy Neutrinos from Binary Neutron Star Merger GW170817 with ANTARES, IceCube, and the Pierre Auger Observatory", arXiv:1710.05839 (Oct 2017)
  4. "Inferences on Mass Composition and Tests of Hadronic Interactions from 0.3 to 100 EeV using the water-Cherenkov Detectors of the Pierre Auger Observatory", arXiv:1710.07249 (Oct 2017)
  5. "Multi-messenger Observations of a Binary Neutron Star Merger", The Astrophysical Journal Letters, Volume 848, Issue 2, article id. L12, 59 pp. (2017) (Oct 2017)
  6. "Observation of a Large-scale Anisotropy in the Arrival Directions of Cosmic Rays above $8 imes 10^{18}$ eV", arXiv:1709.07321 (Sep 2017)
  7. "The Pierre Auger Observatory: Contributions to the 35th International Cosmic Ray Conference (ICRC 2017)", arXiv:1708.06592 (Aug 2017)
  8. "Multi-resolution anisotropy studies of ultrahigh-energy cosmic rays detected at the Pierre Auger Observatory", Journal of Cosmology and Astroparticle Physics, Issue 06, article id. 026 (2017) (Jun 2017)
  9. "Search for photons with energies above 1018 eV using the hybrid detector of the Pierre Auger Observatory", Journal of Cosmology and Astroparticle Physics, Issue 04, article id. 009 (2017) (Apr 2017)
  10. "Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory", Journal of Cosmology and Astroparticle Physics, Issue 04, article id. 038 (2017) (Apr 2017)
  11. "A Targeted Search for Point Sources of EeV Photons with the Pierre Auger Observatory", The Astrophysical Journal Letters, Volume 837, Issue 2, article id. L25, 7 pp. (2017) (Mar 2017)
  12. "Muon counting using silicon photomultipliers in the AMIGA detector of the Pierre Auger observatory", Journal of Instrumentation, Volume 12, Issue 03, pp. P03002 (2017) (Mar 2017)
  13. "Ultrahigh-energy neutrino follow-up of gravitational wave events GW150914 and GW151226 with the Pierre Auger Observatory", Physical Review D, Volume 94, Issue 12, id.122007 (Dec 2016)
  14. "Evidence for a mixed mass composition at the 'ankle' in the cosmic-ray spectrum", Physics Letters B, Volume 762, p. 288-295 (Nov 2016)
  15. "Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory", Physical Review Letters, Volume 117, Issue 19, id.192001 (Nov 2016)
  16. "Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory", Physical Review D, Volume 93, Issue 12, id.122005 (Jun 2016)
  17. "The Pierre Auger Observatory Upgrade - Preliminary Design Report", arXiv:1604.03637 (Apr 2016)
  18. "Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory", Physical Review D, Volume 93, Issue 7, id.072006 (Apr 2016)
  19. "The IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array: Joint Contribution to the 34th International Cosmic Ray Conference (ICRC 2015)", arXiv:1511.02109 (Nov 2015)
  20. "Pierre Auger Observatory and Telescope Array: Joint Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)", arXiv:1511.02103 (Nov 2015)