Alan Watson

Professor, University of Leeds

Ph.D., Physics, University of Edinburgh, 1964
 
Contact Information
Phone: +44 (0) 113 2333888
Email: a.a.watsonleeds.ac.uk
WWW: Web Site
 
Research
Pierre Auger Observatory: A plaque placed at the Southern Hemisphere detector site in Mendoza, Argentina, for the groundbreaking ceremony.
I have interests in all aspects of high energy astroparticle physics, with special interest in the very highest energy cosmic rays. I was head of the Haverah Park extensive air shower project from 1976 until its closure in the early 1990s. This project produced the first evidence for the absence of the celebrated Greisen-Kuzmin-Zatsepin cut-off in the cosmic ray energy spectrum above 4.1019 eV, in addition to providing key data relating to the arrival distribution and mass composition of cosmic rays.
The Haverh Park group was also involved in searches for gamma ray sources at energies around 1 PeV. More recently research interests of broadened to embrace work at the South Pole aimed at elucidating the mass composition of cosmicr rays in the region of the knee at 1 PeV using a shower array and the AMANDA neutrino detector.
Interest in the highest energy cosmic rays continues through collaboration with the Auger project, a world wide effort to construct detectors of 3000 sqkm in Argentina and the USA to push knowledge of the highest energy cosmic rays still further.

Ongoing Scientific Projects:
 
KICP Highlights & News
 
KICP Publications
2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2005 | 2004


Latest Journal Publications
  1. "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)
  2. "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)
  3. "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)
  4. "Muon Counting using Silicon Photomultipliers in the AMIGA detector of the Pierre Auger Observatory", arXiv:1703.06193 (Mar 2017)
  5. "Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter", arXiv:1702.01392 (Feb 2017)
  6. "Search for photons with energies above 10$^{18}$ eV using the hybrid detector of the Pierre Auger Observatory", arXiv:1612.01517 (Dec 2016)
  7. "A targeted search for point sources of EeV photons with the Pierre Auger Observatory", arXiv:1612.04155 (Dec 2016)
  8. "Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory", arXiv:1612.07155 (Dec 2016)
  9. "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)
  10. "Evidence for a mixed mass composition at the 'ankle' in the cosmic-ray spectrum", Physics Letters B, Volume 762, p. 288-295 (Nov 2016)
  11. "Multi-resolution anisotropy studies of ultrahigh-energy cosmic rays detected at the Pierre Auger Observatory", arXiv:1611.06812 (Nov 2016)
  12. "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)
  13. "Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory", arXiv:1610.08509 (Oct 2016)
  14. "Search for ultrarelativistic magnetic monopoles with the Pierre Auger observatory", Physical Review D, Volume 94, Issue 8, id.082002 (Oct 2016)
  15. "Ultrahigh-energy neutrino follow-up of Gravitational Wave events GW150914 and GW151226 with the Pierre Auger Observatory", arXiv:1608.07378 (Aug 2016)
  16. "The Pierre Auger Observatory Upgrade - Preliminary Design Report", arXiv:1604.03637 (Apr 2016)
  17. "Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory", arXiv:1604.00978 (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)

Latest Conference Proceedings
  1. "The DarkSide Program", Roma International Conference on Astroparticle Physics 2014 (RICAP-14), Noto, Italy, Edited by P. Piattelli; A. Capone; R. Coniglione; G. De Bonis; M. De Vincenzi; C. Distefano; A. Morselli; P. Sapienza; EPJ Web of Conferences, Volume 121, id.06010 (Jul 2
  2. "The DarkSide-50 outer detectors", Journal of Physics: Conference Series, Volume 718, Issue 4, article id. 042062 (2016) (May 2016)
  3. "The DarkSide awakens", Journal of Physics: Conference Series, Volume 718, Issue 4, article id. 042016 (2016) (May 2016)