Search for a small-scale neutrino anisotropy with three years of IceCube data

Journal Article · Tue Nov 18 00:00:00 EST 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4902774· OSTI ID:22390641

Bernhard, Anna ^[1]

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1. TU Munich, D-85748 Garching (Germany)

The IceCube neutrino observatory built in the antarctic ice offers unique opportunities in studying high energy neutrino emission from Galactic and extragalactic sources. Detecting such neutrino emission could give valuable information about the origin of cosmic rays. Recently, first evidence for a diffuse astrophysical neutrino signal in the PeV range was found with IceCube. There is no clear point source signal yet, and advanced analysis methods are being developed in order to improve the sensitivity to point sources and resolve the diffuse signal into point sources. Other searches like a energy-dependent likelihood scan were already performed on IceCube data. In this paper, we report a complementary search for multiple neutrino point sources from three years of IceCube data, performing an autocorrelation test on the full sky. This analysis is aiming for various faint sources at unknown positions and energy spectra in the sky. The result obtained from this search is consistant with a background-only case and shows an underfluctuation. Here, we present limits using the ansatz of the small-scale anisotropy search.

• OSTI ID: 22390641
• Journal Information: AIP Conference Proceedings, Vol. 1630, Issue 1; Conference: VLVvT 13: 6. International Workshop on Very Large Volumte Neutrino Telescopes, Stockholm (Sweden), 5-7 Aug 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANISOTROPY
ANTARCTIC REGIONS
ASTROPHYSICS
CHERENKOV COUNTERS
ENERGY DEPENDENCE
ENERGY SPECTRA
ICE
MULTIPARTICLE SPECTROMETERS
NEUTRINO DETECTION
NEUTRINOS
PARTICLE IDENTIFICATION
PEV RANGE
POINT SOURCES
SCINTILLATION COUNTERS
SENSITIVITY
SIGNALS
TELESCOPE COUNTERS