Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources

R. Jansson, G. R. Farrar

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We extend the Maximum Likelihood method used by HiRes to study cross correlations between a catalog of candidate astrophysical sources and Ultrahigh Energy Cosmic Rays (UHECRs), to allow for differing source luminosities. Our approach permits individual sources to be ranked according to their likelihood of having emitted the correlated UHECRs. We test both old and new method by simulations for various scenarios. We conclude that there are 9 true correlation between HiRes UHECRs and known BLLacs, with a 6 × 10-5 probability of such a correlation arising by chance.

    Original languageEnglish (US)
    Title of host publicationProceedings of the 30th International Cosmic Ray Conference, ICRC 2007
    PublisherUniversidad Nacional Autonoma de Mexico
    Pages559-562
    Number of pages4
    Volume4
    EditionHE PART 1
    StatePublished - 2007
    Event30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico
    Duration: Jul 3 2007Jul 11 2007

    Other

    Other30th International Cosmic Ray Conference, ICRC 2007
    CountryMexico
    CityMerida, Yucatan
    Period7/3/077/11/07

    Fingerprint

    cross correlation
    cosmic rays
    astrophysics
    catalogs
    energy
    luminosity
    simulation

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Jansson, R., & Farrar, G. R. (2007). Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources. In Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 (HE PART 1 ed., Vol. 4, pp. 559-562). Universidad Nacional Autonoma de Mexico.

    Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources. / Jansson, R.; Farrar, G. R.

    Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. Vol. 4 HE PART 1. ed. Universidad Nacional Autonoma de Mexico, 2007. p. 559-562.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Jansson, R & Farrar, GR 2007, Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources. in Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. HE PART 1 edn, vol. 4, Universidad Nacional Autonoma de Mexico, pp. 559-562, 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico, 7/3/07.
    Jansson R, Farrar GR. Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources. In Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. HE PART 1 ed. Vol. 4. Universidad Nacional Autonoma de Mexico. 2007. p. 559-562
    Jansson, R. ; Farrar, G. R. / Maximum Likelihood method for ultrahigh energy cosmic ray cross correlations with astrophysical sources. Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. Vol. 4 HE PART 1. ed. Universidad Nacional Autonoma de Mexico, 2007. pp. 559-562
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