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Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Yuan, T. (2020). Neutrinos below 100 TeV from the southern sky employing refined veto techniques to IceCube data. Astroparticle physics, 116, Article ID 102392.
Open this publication in new window or tab >>Neutrinos below 100 TeV from the southern sky employing refined veto techniques to IceCube data
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2020 (English)In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 116, article id 102392Article in journal (Refereed) Published
Abstract [en]

Many Galactic sources of gamma rays, such as supernova remnants, are expected to produce neutrinos with a typical energy cutoff well below 100 TeV. For the IceCube Neutrino Observatory located at the South Pole, the southern sky, containing the inner part of the Galactic plane and the Galactic Center, is a particularly challenging region at these energies, because of the large background of atmospheric muons. In this paper, we present recent advancements in data selection strategies for track-like muon neutrino events with energies below 100 TeV from the southern sky. The strategies utilize the outer detector regions as veto and features of the signal pattern to reduce the background of atmospheric muons to a level which, for the first time, allows IceCube searching for point-like sources of neutrinos in the southern sky at energies between 100 GeV and several TeV in the muon neutrino charged current channel. No significant clustering of neutrinos above background expectation was observed in four years of data recorded with the completed IceCube detector. Upper limits on the neutrino flux for a number of spectral hypotheses are reported for a list of astrophysical objects in the southern hemisphere. 

Place, publisher, year, edition, pages
ELSEVIER, 2020
Keywords
Neutrinos, Point sources, Veto techniques
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-400830 (URN)10.1016/j.astropartphys.2019.102392 (DOI)000501416000004 ()
Funder
Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationSwedish Polar Research Secretariat
Available from: 2020-01-13 Created: 2020-01-13 Last updated: 2020-01-13Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Zoll, M. (2019). Erratum to: Search for annihilating dark matter in the Sun with 3 years of IceCube data. European Physical Journal C, 79(3), Article ID 214.
Open this publication in new window or tab >>Erratum to: Search for annihilating dark matter in the Sun with 3 years of IceCube data
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2019 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 79, no 3, article id 214Article in journal (Other academic) Published
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-380661 (URN)10.1140/epjc/s10052-019-6702-y (DOI)000460819300003 ()
Funder
German Research Foundation (DFG)Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationSwedish National Infrastructure for Computing (SNIC)Danish National Research FoundationSwedish Polar Research SecretariatAustralian Research Council
Note

Correction of: European Physical Journal C, vol. 77, issue 3, article Number: 146. DOI: 10.1140/epjc/s10052-017-4689-9

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-05-21Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Zoll, M. (2018). Astrophysical neutrinos and cosmic rays observed by IceCube. Advances in Space Research, 62(10), 2902-2930
Open this publication in new window or tab >>Astrophysical neutrinos and cosmic rays observed by IceCube
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2018 (English)In: Advances in Space Research, ISSN 0273-1177, E-ISSN 1879-1948, Vol. 62, no 10, p. 2902-2930Article in journal (Refereed) Published
Abstract [en]

The core mission of the IceCube neutrino observatory is to study the origin and propagation of cosmic rays. IceCube, with its surface component IceTop, observes multiple signatures to accomplish this mission. Most important are the astrophysical neutrinos that are produced in interactions of cosmic rays, close to their sources and in interstellar space. IceCube is the first instrument that measures the properties of this astrophysical neutrino flux and constrains its origin. In addition, the spectrum, composition, and anisotropy of the local cosmic-ray flux are obtained from measurements of atmospheric muons and showers. Here we provide an overview of recent findings from the analysis of IceCube data, and their implications to our understanding of cosmic rays.

Keywords
IceCube, Neutrinos, Cosmic rays
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-371533 (URN)10.1016/j.asr.2017.05.030 (DOI)000449448700012 ()
Funder
Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationAustralian Research Council
Available from: 2018-12-21 Created: 2018-12-21 Last updated: 2019-05-21Bibliographically approved
Aartsen, M. G., Abraham, K., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., . . . Zoll, M. (2017). All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data. Astrophysical Journal, 835(2), Article ID 151.
Open this publication in new window or tab >>All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data
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2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 835, no 2, article id 151Article in journal (Refereed) Published
Abstract [en]

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(nu)(2)d phi/dE(nu) = 10(-12) TeV cm(-2) s(-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.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2017
Keywords
astroparticle physics, galaxies: active, neutrinos
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-324355 (URN)10.3847/1538-4357/835/2/151 (DOI)000401145300012 ()
Funder
Swedish Research CouncilSwedish Polar Research SecretariatSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg Foundation
Available from: 2017-06-16 Created: 2017-06-16 Last updated: 2017-06-16Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Zoll, M. (2017). Extending the Search for Muon Neutrinos Coincident with Gamma-Ray Bursts in IceCube Data. Astrophysical Journal, 843(2), Article ID 112.
Open this publication in new window or tab >>Extending the Search for Muon Neutrinos Coincident with Gamma-Ray Bursts in IceCube Data
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2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 843, no 2, article id 112Article in journal (Refereed) Published
Abstract [en]

We present an all-sky search for muon neutrinos produced during the prompt γ-ray emission of 1172 gamma-ray bursts (GRBs) with the IceCube Neutrino Observatory. The detection of these neutrinos would constitute evidence for ultra-high-energy cosmic-ray (UHECR) production in GRBs, as interactions between accelerated protons and the prompt γ-ray field would yield charged pions, which decay to neutrinos. A previously reported search for muon neutrino tracks from northern hemisphere GRBs has been extended to include three additional years of IceCube data. A search for such tracks from southern hemisphere GRBs in five years of IceCube data has been introduced to enhance our sensitivity to the highest energy neutrinos. No significant correlation between neutrino events and observed GRBs is seen in the new data. Combining this result with previous muon neutrino track searches and a search for cascade signature events from all neutrino flavors, we obtain new constraints for single-zone fireball models of GRB neutrino and UHECR production.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2017
Keywords
acceleration of particles, astroparticle physics, gamma-ray burst: general, neutrinos
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-331240 (URN)10.3847/1538-4357/aa7569 (DOI)000405278700012 ()
Funder
Swedish Research CouncilSwedish Polar Research SecretariatSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg Foundation
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2017-10-24Bibliographically approved
Aartsen, M. G., Abraham, K., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., . . . Zoll, M. (2017). First search for dark matter annihilations in the Earth with the IceCube detector. European Physical Journal C, 77(2), Article ID 82.
Open this publication in new window or tab >>First search for dark matter annihilations in the Earth with the IceCube detector