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research article

Extending the search for neutrino point sources with iceCube above the horizon

Abbasi, R.
•
Abdou, Y.
•
Abu-Zayyad, T.
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2009
Physical Review Letters

Point source searches with the IceCube neutrino telescope have been restricted to one hemisphere, due to the exclusive selection of upward going events as a way of rejecting the atmospheric muon background. We show that the region above the horizon can be included by suppressing the background through energy-sensitive cuts. This improves the sensitivity above PeV energies, previously not accessible for declinations of more than a few degrees below the horizon due to the absorption of neutrinos in Earth. We present results based on data collected with 22 strings of IceCube, extending its field of view and energy reach for point source searches. No significant excess above the atmospheric background is observed in a sky scan and in tests of source candidates. Upper limits are reported, which for the first time cover point sources in the southern sky up to EeV energies. © 2009 The American Physical Society.

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Type
research article
DOI
10.1103/PhysRevLett.103.221102
Web of Science ID

WOS:000272182000012

Scopus ID

2-s2.0-72649098574

Author(s)
Abbasi, R.
Abdou, Y.
Abu-Zayyad, T.
Adams, J.
Aguilar, J.A.
Ahlers, M.
Andeen, K.
Auffenberg, J.
Bai, X.
Baker, M.
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Date Issued

2009

Published in
Physical Review Letters
Volume

103

Issue

22

Article Number

221102

Subjects

Gamma-Rays

•

Telescope

•

Detector

•

Jets

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPHE  
Available on Infoscience
November 5, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/56928
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