Search for correlations between HiRes stereo events and active galactic nuclei

Autor: R. C. Gray, B. T. Stokes, C. Song, B. C. Knapp, J. R. Thomas, John N. Matthews, J. H. Boyer, Segev BenZvi, L. M. Scott, A. O’Neill, R. Riehle, C. Cannon, O. A. Brusova, Pierre Sokolsky, Dale Tupa, G. Archbold, P. Hüntemeyer, Konstantin Belov, W. Deng, Douglas Bergman, N. Sasaki, C. B. Finley, M. M. Maestas, M. A. Kirn, S. A. Blake, Gordon Thomson, M. D. Roberts, R. W. Springer, E. J. Mannel, C. C. H. Jui, Steve Schnetzer, E. C. Loh, G. Sinnis, Gareth Hughes, S. B. Thomas, C. M. Hoffman, Michael H. Holzscheiter, Tareq Abu-Zayyad, B. F. Jones, M. Seman, Y. Fedorova, J. D. Smith, Kevin Reil, N. Manago, J. F. Amman, J. Findlay, D. Rodriguez, Z. Cao, Lawrence Wiencke, Dmitri Ivanov, R. Snow, John Belz, S. A. Moore, L. Perera, Xiang Zhang, L. J. Marek, K. Kim, M. Allen, William Hanlon, Rasha Abbasi, C. A. Painter, K. Martens, A. Zech, G. W. Burt, S. R. Stratton
Rok vydání: 2008
Předmět:
Zdroj: Astroparticle Physics. 30:175-179
ISSN: 0927-6505
Popis: 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 (AGN) visible from its northern hemisphere location. No correlations, other than random correlations, have been found. We report our results using search parameters prescribed by the Pierre Auger collaboration. Using these parameters, the Auger collaboration concludes that a positive correlation exists for sources visible to their southern hemisphere location. We also describe results using two methods for determining the chance probability of correlations: one in which a hypothesis is formed from scanning one half of the data and tested on the second half, and another which involves a scan over the entire data set. The most significant correlation found occurred with a chance probability of 24%.
13 pages, 1 table, 5 figures
Databáze: OpenAIRE
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