All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data
Author(s)
Arguelles Delgado, Carlos A; Axani, Spencer Nicholas; Collin, G. H.; Conrad, Janet Marie; Jones, Benjamin James Poyner; Moulai, Marjon H.; ... Show more Show less
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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.
Date issued
2017-01Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
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
ISSN
1538-4357