All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data
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Aartsen-2017-All-sky search for time-integrate.pdf
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Author(s)
Arguelles Delgado, Carlos A
Axani, Spencer Nicholas
Collin, G. H.
Conrad, Janet Marie
Jones, Benjamin James Poyner
Moulai, Marjon H.
Date Issued
January 2017
Journal
The Astrophysical Journal
Publisher
IOP Publishing
Citation
Aartsen, M. G. et al. “All-Sky Search for Time-Integrated Neutrino Emission from Astrophysical Sources with 7 Yr of IceCube Data.” The Astrophysical Journal 835.2 (2017): 151. © 2017 The American Astronomical Society
Version
Final published version
Abstract
Since the recent detection of an astrophysical flux of high-energy neutrinos, the question of its origin has not yet fully been answered. Much of what is known about this flux comes from a small event sample of high neutrino purity, good energy resolution, but large angular uncertainties. In searches for point-like sources, on the other hand, the best performance is given by using large statistics and good angular reconstructions. Track-like muon events produced in neutrino interactions satisfy these requirements. We present here the results of searches for point-like sources with neutrinos using data acquired by the IceCube detector over 7 yr from 2008 to 2015. The discovery potential of the analysis in the northern sky is now significantly below E[superscript 2][subscript nu]φ/ dE[subscript nu] = 10[superscript −12] TeV cm[superscript −2] s[superscript −1], on average 38% lower than the sensitivity of the previously published analysis of 4 yr exposure. No significant clustering of neutrinos above background expectation was observed, and implications for prominent neutrino source candidates are discussed.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.3847/1538-4357/835/2/151
