Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/106105
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Type: Journal article
Title: Search for sources of high-energy neutrons with four years of data from the IceTop detector
Author: Aartsen, M.
Abraham, K.
Ackermann, M.
Adams, J.
Aguilar, J.
Ahlers, M.
Ahrens, M.
Altmann, D.
Andeen, K.
Anderson, T.
Ansseau, I.
Anton, G.
Archinger, M.
Argüelles, C.
Auffenberg, J.
Axani, S.
Bai, X.
Barwick, S.
Baum, V.
Bay, R.
et al.
Citation: Astrophysical Journal, 2016; 830(2):1-12
Publisher: IOP Publishing
Issue Date: 2016
ISSN: 0004-637X
1538-4357
Statement of
Responsibility: 
M.G. Aartsen … S. Robertson … A. Wallace … B.J. Whelan … [et al.] (The ICECUBE Collaboration)
Abstract: IceTop is an air-shower array located on the Antarctic ice sheet at the geographic South Pole. IceTop can detect an astrophysical flux of neutrons from Galactic sources as an excess of cosmic-ray air showers arriving from the source direction. Neutrons are undeflected by the Galactic magnetic field and can typically travel 10 (E/PeV) pc before decay. Two searches are performed using 4 yr of the IceTop data set to look for a statistically significant excess of events with energies above 10 PeV (10¹⁶ eV) arriving within a small solid angle. The all-sky search method covers from −90° to approximately −50° in declination. No significant excess is found. A targeted search is also performed, looking for significant correlation with candidate sources in different target sets. This search uses a higher-energy cut (100 PeV) since most target objects lie beyond 1 kpc. The target sets include pulsars with confirmed TeV energy photon fluxes and high-mass X-ray binaries. No significant correlation is found for any target set. Flux upper limits are determined for both searches, which can constrain Galactic neutron sources and production scenarios.
Keywords: Astroparticle physics; cosmic rays; methods: data analysis
Rights: © 2016. The American Astronomical Society. All rights reserved.
RMID: 0030059246
DOI: 10.3847/0004-637X/830/2/129
Appears in Collections:Chemistry and Physics publications

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