Search for point sources of ultra-high-energy cosmic rays above 4.0 × 1019 eV using a maximum likelihood ratio test

R. U. Abbasi, T. Abu-Zayyad, J. F. Amann, G. Archbold, R. Atkins, J. A. Bellido, K. Belov, J. W. Betz, S. Y. Ben-Zvi, D. R. Bergman, J. H. Boyer, G. W. Burt, Z. Cao, R. W. Clay, B. M. Connolly, B. R. Dawson, W. Deng, G. R. Farrar, Y. Fedorova, J. FindlayC. B. Finley, W. F. Hanlon, C. M. Hoffman, M. H. Holzscheiter, G. A. Hughes, P. Hüntemeyer, C. C.H. Jui, K. Kim, M. A. Kirn, B. C. Knapp, E. C. Loh, M. M. Maestas, N. Manago, E. J. Mannel, L. J. Marek, K. Martens, J. A.J. Matthews, J. N. Matthews, A. O'Neill, C. A. Painter, L. Perera, K. Reil, R. Riehle, M. D. Roberts, M. Sasaki, S. R. Schnetzer, M. Seman, K. M. Simpson, G. Sinnis, J. D. Smith, R. Snow, P. Sokolsky, C. Song, R. W. Springer, B. T. Stokes, J. R. Thomas, S. B. Thomas, G. B. Thomson, D. Tupa, S. Westerhoff, L. R. Wiencke, A. Zech

    Research output: Contribution to journalArticle

    Abstract

    We present the results of a search for cosmic-ray point sources at energies in excess of 4.0 × 1019 eV in the combined data sets recorded by the Akeno Giant Air Shower Array and High Resolution Fly's Eye stereo experiments. The analysis is based on a maximum likelihood ratio test using the probability density function for each event rather than requiring an a priori choice of a fixed angular bin size. No statistically significant clustering of events consistent with a point source is found.

    Original languageEnglish (US)
    Pages (from-to)164-170
    Number of pages7
    JournalAstrophysical Journal
    Volume623
    Issue number1 I
    DOIs
    StatePublished - Apr 10 2005

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    Keywords

    • Acceleration of particles
    • Cosmic rays
    • Large-scale structure of universe

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Abbasi, R. U., Abu-Zayyad, T., Amann, J. F., Archbold, G., Atkins, R., Bellido, J. A., Belov, K., Betz, J. W., Ben-Zvi, S. Y., Bergman, D. R., Boyer, J. H., Burt, G. W., Cao, Z., Clay, R. W., Connolly, B. M., Dawson, B. R., Deng, W., Farrar, G. R., Fedorova, Y., ... Zech, A. (2005). Search for point sources of ultra-high-energy cosmic rays above 4.0 × 1019 eV using a maximum likelihood ratio test. Astrophysical Journal, 623(1 I), 164-170. https://doi.org/10.1086/428570