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First Neutrino Point-Source Results from the 22 String Icecube Detector
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2009 (English)In: The Astrophysical Journal Letters, ISSN 2041-8205, Vol. 701, no 1, L47-L51 p.Article in journal (Refereed) Published
Abstract [en]

We present new results of searches for neutrino point sources in the northern sky, using data recorded in 2007-2008 with 22 strings of the IceCube detector (approximately one-fourth of the planned total) and 275.7 days of live time. The final sample of 5114 neutrino candidate events agrees well with the expected background of atmospheric muon neutrinos and a small component of atmospheric muons. No evidence of a point source is found, with the most significant excess of events in the sky at 2.2σ after accounting for all trials. The average upper limit over the northern sky for point sources of muon-neutrinos with E –2 spectrum is ##IMG## [http://ej.iop.org/images/1538-4357/701/1/L47/apjl318527ieqn1.gif] $E^2\,Φ _ν _μ < 1.4 \,\,\times\,\, 10^-11\; \mathrmTeV\;cm^-2\;\mathrms^-1$ , in the energy range from 3 TeV to 3 PeV, improving the previous best average upper limit by the AMANDA-II detector by a factor of 2.

Place, publisher, year, edition, pages
2009. Vol. 701, no 1, L47-L51 p.
National Category
Subatomic Physics
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-27606DOI: 10.1088/0004-637X/701/1/L47OAI: oai:DiVA.org:lnu-27606DiVA: diva2:637456
Available from: 2013-07-18 Created: 2013-07-18 Last updated: 2013-07-18Bibliographically approved

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Publisher's full texthttp://stacks.iop.org/1538-4357/701/i=1/a=L47

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CiteExportLink to record
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Citation style
  • apa
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Language
  • de-DE
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