Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-09-30
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages, 3 figures, Proceedings of the 31st ICRC, Lodz, Poland, July 2009
Scientific paper
We present the results of a new analysis of data taken in 1998-2002 for a search for high-energy extraterrestrial neutrinos. The analysis is based on a full reconstruction of high-energy cascade parameters: vertex coordinates, energy and arrival direction. Upper limits on the diffuse fluxes of all neutrino flavors, predicted by several models of AGN-like neutrino sources are derived. For an ${\bf E^{-2}}$ behavior of the neutrino spectrum, our limit is ${\bf E^{2} F_{\nu}(E) < 2.9 \times 10^{-7}}$ cm${\bf ^{-2}}$ s${\bf ^{-1}}$ sr${\bf ^{-1}}$ GeV over a neutrino energy range ${\bf 2 \times 10^4 \div 2 \times 10^7}$ GeV. This limit is by a factor of 2.8 more stringent than a limit obtained with a previous analysis.
Dzhilkibaev Zh.-A.
for the BAIKAL Collaboration
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