Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-05-09
Phys.Rev.D76:042008,2007; Erratum-ibid.D77:089904,2008
Astronomy and Astrophysics
Astrophysics
47 pages, 13 figures. This includes the original document and an erratum for the effective area tables
Scientific paper
10.1103/PhysRevD.76.042008
A search for TeV - PeV muon neutrinos from unresolved sources was performed on AMANDA-II data collected between 2000 and 2003 with an equivalent livetime of 807 days. This diffuse analysis sought to find an extraterrestrial neutrino flux from sources with non-thermal components. The signal is expected to have a harder spectrum than the atmospheric muon and neutrino backgrounds. Since no excess of events was seen in the data over the expected background, an upper limit of E^{2}\Phi_{90% C.L.} < 7.4 x 10^{-8} GeV cm^{-2} s^{-1} sr^{-1} is placed on the diffuse flux of muon neutrinos with a \Phi \propto E^{-2} spectrum in the energy range 16 TeV to 2.5 PeV. This is currently the most sensitive \Phi \propto E^{-2} diffuse astrophysical neutrino limit. We also set upper limits for astrophysical and prompt neutrino models, all of which have spectra different than \Phi \propto E^{-2}.
Achterberg Abraham
IceCube Collaboration
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