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 |
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| Rok vydání: | 2008 |
| Předmět: |
Physics
Active galactic nucleus 010308 nuclear & particles physics Astrophysics (astro-ph) Northern Hemisphere FOS: Physical sciences Astronomy Astronomy and Astrophysics Cosmic ray Astrophysics Positive correlation 01 natural sciences Auger Data set Correlation 0103 physical sciences 010303 astronomy & astrophysics Southern Hemisphere |
| Zdroj: | Astroparticle Physics. 30:175-179 |
| ISSN: | 0927-6505 |
| DOI: | 10.1016/j.astropartphys.2008.08.004 |
| 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 |
| Externí odkaz: |
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