Lowering IceCube's energy threshold for point source searches in the Southern Sky

Autores
Aartsen, M. G.; Abraham, K.; Ackermann, M.; Adams, J.; Aguilar, J. A.; Golup, Geraldina Tamara; Wallace, A.; Wallraff, M.; Wandkowsky, N.; Weaver, Ch.; Wendt, C.; Westerhoff, S.; Whelan, B. J.; Whitehorn, N.; Wickmann, S.; Wiebe, K.; Wiebusch, C. H.; Wille, L.; Williams, D. R.; Wills, L.; Wissing, H.; Wolf, M.; Wood, T. R.; Woschnagg, K.; Xu, D. L.; Xu, X. W.; Xu, Y.; Yanez, J. P.; Yodh, G.; Yoshida, S.; Zoll, M.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Observation of a point source of astrophysical neutrinos would be a "smoking gun" signature of a cosmic-ray accelerator. While IceCube has recently discovered a diffuse flux of astrophysical neutrinos, no localized point source has been observed. Previous IceCube searches for point sources in the southern sky were restricted by either an energy threshold above a few hundred TeV or poor neutrino angular resolution. Here we present a search for southern sky point sources with greatly improved sensitivities to neutrinos with energies below 100 TeV. By selecting charged-current ν μ interacting inside the detector, we reduce the atmospheric background while retaining efficiency for astrophysical neutrino-induced events reconstructed with sub-degree angular resolution. The new event sample covers three years of detector data and leads to a factor of 10 improvement in sensitivity to point sources emitting below 100 TeV in the southern sky. No statistically significant evidence of point sources was found, and upper limits are set on neutrino emission from individual sources. A posteriori analysis of the highest-energy (~100 TeV) starting event in the sample found that this event alone represents a 2.8σ deviation from the hypothesis that the data consists only of atmospheric background.
Fil: Aartsen, M. G.. University of Adelaide; Australia
Fil: Abraham, K.. Technische Universität München; Alemania
Fil: Ackermann, M.. Deutsches Elektronen-Synchrotron; Alemania
Fil: Adams, J.. University Of Canterbury; Nueva Zelanda
Fil: Aguilar, J. A.. Université Libre de Bruxelles; Bélgica
Fil: Golup, Geraldina Tamara. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Wallace, A.. University of Adelaide; Australia
Fil: Wallraff, M.. Rwth Aachen University; Alemania
Fil: Wandkowsky, N.. University of Wisconsin; Estados Unidos
Fil: Weaver, Ch.. University of Alberta; Canadá
Fil: Wendt, C.. University of Wisconsin; Estados Unidos
Fil: Westerhoff, S.. University of Wisconsin; Estados Unidos
Fil: Whelan, B. J.. University of Adelaide; Australia
Fil: Whitehorn, N.. University of California at Berkeley; Estados Unidos
Fil: Wickmann, S.. Rwth Aachen University; Alemania
Fil: Wiebe, K.. Johannes Gutenberg Universitat Mainz; Alemania
Fil: Wiebusch, C. H.. Rwth Aachen University; Alemania
Fil: Wille, L.. University of Wisconsin; Estados Unidos
Fil: Williams, D. R.. University of Alabama at Birmingahm; Estados Unidos
Fil: Wills, L.. Drexel University; Estados Unidos
Fil: Wissing, H.. University of Maryland; Estados Unidos
Fil: Wolf, M.. Stockholms Universitet; Suecia
Fil: Wood, T. R.. University of Alberta; Canadá
Fil: Woschnagg, K.. University of California at Berkeley; Estados Unidos
Fil: Xu, D. L.. University of Wisconsin; Estados Unidos
Fil: Xu, X. W.. Southern University; Estados Unidos
Fil: Xu, Y.. Stony Brook University; Estados Unidos
Fil: Yanez, J. P.. Deutsches Elektronen-Synchrotron; Alemania
Fil: Yodh, G.. University of California at Irvine; Estados Unidos
Fil: Yoshida, S.. Chiba University; Japón
Fil: Zoll, M.. Stockholms Universitet; Suecia
Materia
NEUTRINO ASTRONOMY
IceCube
Neutrino angular resolution
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63561

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network_name_str CONICET Digital (CONICET)
spelling Lowering IceCube's energy threshold for point source searches in the Southern SkyAartsen, M. G.Abraham, K.Ackermann, M.Adams, J.Aguilar, J. A.Golup, Geraldina TamaraWallace, A.Wallraff, M.Wandkowsky, N.Weaver, Ch.Wendt, C.Westerhoff, S.Whelan, B. J.Whitehorn, N.Wickmann, S.Wiebe, K.Wiebusch, C. H.Wille, L.Williams, D. R.Wills, L.Wissing, H.Wolf, M.Wood, T. R.Woschnagg, K.Xu, D. L.Xu, X. W.Xu, Y.Yanez, J. P.Yodh, G.Yoshida, S.Zoll, M.NEUTRINO ASTRONOMYIceCubeNeutrino angular resolutionhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Observation of a point source of astrophysical neutrinos would be a "smoking gun" signature of a cosmic-ray accelerator. While IceCube has recently discovered a diffuse flux of astrophysical neutrinos, no localized point source has been observed. Previous IceCube searches for point sources in the southern sky were restricted by either an energy threshold above a few hundred TeV or poor neutrino angular resolution. Here we present a search for southern sky point sources with greatly improved sensitivities to neutrinos with energies below 100 TeV. By selecting charged-current ν μ interacting inside the detector, we reduce the atmospheric background while retaining efficiency for astrophysical neutrino-induced events reconstructed with sub-degree angular resolution. The new event sample covers three years of detector data and leads to a factor of 10 improvement in sensitivity to point sources emitting below 100 TeV in the southern sky. No statistically significant evidence of point sources was found, and upper limits are set on neutrino emission from individual sources. A posteriori analysis of the highest-energy (~100 TeV) starting event in the sample found that this event alone represents a 2.8σ deviation from the hypothesis that the data consists only of atmospheric background.Fil: Aartsen, M. G.. University of Adelaide; AustraliaFil: Abraham, K.. Technische Universität München; AlemaniaFil: Ackermann, M.. Deutsches Elektronen-Synchrotron; AlemaniaFil: Adams, J.. University Of Canterbury; Nueva ZelandaFil: Aguilar, J. A.. Université Libre de Bruxelles; BélgicaFil: Golup, Geraldina Tamara. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Wallace, A.. University of Adelaide; AustraliaFil: Wallraff, M.. Rwth Aachen University; AlemaniaFil: Wandkowsky, N.. University of Wisconsin; Estados UnidosFil: Weaver, Ch.. University of Alberta; CanadáFil: Wendt, C.. University of Wisconsin; Estados UnidosFil: Westerhoff, S.. University of Wisconsin; Estados UnidosFil: Whelan, B. J.. University of Adelaide; AustraliaFil: Whitehorn, N.. University of California at Berkeley; Estados UnidosFil: Wickmann, S.. Rwth Aachen University; AlemaniaFil: Wiebe, K.. Johannes Gutenberg Universitat Mainz; AlemaniaFil: Wiebusch, C. H.. Rwth Aachen University; AlemaniaFil: Wille, L.. University of Wisconsin; Estados UnidosFil: Williams, D. R.. University of Alabama at Birmingahm; Estados UnidosFil: Wills, L.. Drexel University; Estados UnidosFil: Wissing, H.. University of Maryland; Estados UnidosFil: Wolf, M.. Stockholms Universitet; SueciaFil: Wood, T. R.. University of Alberta; CanadáFil: Woschnagg, K.. University of California at Berkeley; Estados UnidosFil: Xu, D. L.. University of Wisconsin; Estados UnidosFil: Xu, X. W.. Southern University; Estados UnidosFil: Xu, Y.. Stony Brook University; Estados UnidosFil: Yanez, J. P.. Deutsches Elektronen-Synchrotron; AlemaniaFil: Yodh, G.. University of California at Irvine; Estados UnidosFil: Yoshida, S.. Chiba University; JapónFil: Zoll, M.. Stockholms Universitet; SueciaIOP Publishing2016-06-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/63561Aartsen, M. G.; Abraham, K.; Ackermann, M.; Adams, J.; Aguilar, J. A.; et al.; Lowering IceCube's energy threshold for point source searches in the Southern Sky; IOP Publishing; Astrophysical Journal; 824; 2; 21-6-2016; 1-190004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/2041-8205/824/2/L28info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8205/824/2/L28info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1605.00163info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:57:50Zoai:ri.conicet.gov.ar:11336/63561instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:57:50.735CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Lowering IceCube's energy threshold for point source searches in the Southern Sky
title Lowering IceCube's energy threshold for point source searches in the Southern Sky
spellingShingle Lowering IceCube's energy threshold for point source searches in the Southern Sky
Aartsen, M. G.
NEUTRINO ASTRONOMY
IceCube
Neutrino angular resolution
title_short Lowering IceCube's energy threshold for point source searches in the Southern Sky
title_full Lowering IceCube's energy threshold for point source searches in the Southern Sky
title_fullStr Lowering IceCube's energy threshold for point source searches in the Southern Sky
title_full_unstemmed Lowering IceCube's energy threshold for point source searches in the Southern Sky
title_sort Lowering IceCube's energy threshold for point source searches in the Southern Sky
dc.creator.none.fl_str_mv Aartsen, M. G.
Abraham, K.
Ackermann, M.
Adams, J.
Aguilar, J. A.
Golup, Geraldina Tamara
Wallace, A.
Wallraff, M.
Wandkowsky, N.
Weaver, Ch.
Wendt, C.
Westerhoff, S.
Whelan, B. J.
Whitehorn, N.
Wickmann, S.
Wiebe, K.
Wiebusch, C. H.
Wille, L.
Williams, D. R.
Wills, L.
Wissing, H.
Wolf, M.
Wood, T. R.
Woschnagg, K.
Xu, D. L.
Xu, X. W.
Xu, Y.
Yanez, J. P.
Yodh, G.
Yoshida, S.
Zoll, M.
author Aartsen, M. G.
author_facet Aartsen, M. G.
Abraham, K.
Ackermann, M.
Adams, J.
Aguilar, J. A.
Golup, Geraldina Tamara
Wallace, A.
Wallraff, M.
Wandkowsky, N.
Weaver, Ch.
Wendt, C.
Westerhoff, S.
Whelan, B. J.
Whitehorn, N.
Wickmann, S.
Wiebe, K.
Wiebusch, C. H.
Wille, L.
Williams, D. R.
Wills, L.
Wissing, H.
Wolf, M.
Wood, T. R.
Woschnagg, K.
Xu, D. L.
Xu, X. W.
Xu, Y.
Yanez, J. P.
Yodh, G.
Yoshida, S.
Zoll, M.
author_role author
author2 Abraham, K.
Ackermann, M.
Adams, J.
Aguilar, J. A.
Golup, Geraldina Tamara
Wallace, A.
Wallraff, M.
Wandkowsky, N.
Weaver, Ch.
Wendt, C.
Westerhoff, S.
Whelan, B. J.
Whitehorn, N.
Wickmann, S.
Wiebe, K.
Wiebusch, C. H.
Wille, L.
Williams, D. R.
Wills, L.
Wissing, H.
Wolf, M.
Wood, T. R.
Woschnagg, K.
Xu, D. L.
Xu, X. W.
Xu, Y.
Yanez, J. P.
Yodh, G.
Yoshida, S.
Zoll, M.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv NEUTRINO ASTRONOMY
IceCube
Neutrino angular resolution
topic NEUTRINO ASTRONOMY
IceCube
Neutrino angular resolution
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Observation of a point source of astrophysical neutrinos would be a "smoking gun" signature of a cosmic-ray accelerator. While IceCube has recently discovered a diffuse flux of astrophysical neutrinos, no localized point source has been observed. Previous IceCube searches for point sources in the southern sky were restricted by either an energy threshold above a few hundred TeV or poor neutrino angular resolution. Here we present a search for southern sky point sources with greatly improved sensitivities to neutrinos with energies below 100 TeV. By selecting charged-current ν μ interacting inside the detector, we reduce the atmospheric background while retaining efficiency for astrophysical neutrino-induced events reconstructed with sub-degree angular resolution. The new event sample covers three years of detector data and leads to a factor of 10 improvement in sensitivity to point sources emitting below 100 TeV in the southern sky. No statistically significant evidence of point sources was found, and upper limits are set on neutrino emission from individual sources. A posteriori analysis of the highest-energy (~100 TeV) starting event in the sample found that this event alone represents a 2.8σ deviation from the hypothesis that the data consists only of atmospheric background.
Fil: Aartsen, M. G.. University of Adelaide; Australia
Fil: Abraham, K.. Technische Universität München; Alemania
Fil: Ackermann, M.. Deutsches Elektronen-Synchrotron; Alemania
Fil: Adams, J.. University Of Canterbury; Nueva Zelanda
Fil: Aguilar, J. A.. Université Libre de Bruxelles; Bélgica
Fil: Golup, Geraldina Tamara. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Wallace, A.. University of Adelaide; Australia
Fil: Wallraff, M.. Rwth Aachen University; Alemania
Fil: Wandkowsky, N.. University of Wisconsin; Estados Unidos
Fil: Weaver, Ch.. University of Alberta; Canadá
Fil: Wendt, C.. University of Wisconsin; Estados Unidos
Fil: Westerhoff, S.. University of Wisconsin; Estados Unidos
Fil: Whelan, B. J.. University of Adelaide; Australia
Fil: Whitehorn, N.. University of California at Berkeley; Estados Unidos
Fil: Wickmann, S.. Rwth Aachen University; Alemania
Fil: Wiebe, K.. Johannes Gutenberg Universitat Mainz; Alemania
Fil: Wiebusch, C. H.. Rwth Aachen University; Alemania
Fil: Wille, L.. University of Wisconsin; Estados Unidos
Fil: Williams, D. R.. University of Alabama at Birmingahm; Estados Unidos
Fil: Wills, L.. Drexel University; Estados Unidos
Fil: Wissing, H.. University of Maryland; Estados Unidos
Fil: Wolf, M.. Stockholms Universitet; Suecia
Fil: Wood, T. R.. University of Alberta; Canadá
Fil: Woschnagg, K.. University of California at Berkeley; Estados Unidos
Fil: Xu, D. L.. University of Wisconsin; Estados Unidos
Fil: Xu, X. W.. Southern University; Estados Unidos
Fil: Xu, Y.. Stony Brook University; Estados Unidos
Fil: Yanez, J. P.. Deutsches Elektronen-Synchrotron; Alemania
Fil: Yodh, G.. University of California at Irvine; Estados Unidos
Fil: Yoshida, S.. Chiba University; Japón
Fil: Zoll, M.. Stockholms Universitet; Suecia
description Observation of a point source of astrophysical neutrinos would be a "smoking gun" signature of a cosmic-ray accelerator. While IceCube has recently discovered a diffuse flux of astrophysical neutrinos, no localized point source has been observed. Previous IceCube searches for point sources in the southern sky were restricted by either an energy threshold above a few hundred TeV or poor neutrino angular resolution. Here we present a search for southern sky point sources with greatly improved sensitivities to neutrinos with energies below 100 TeV. By selecting charged-current ν μ interacting inside the detector, we reduce the atmospheric background while retaining efficiency for astrophysical neutrino-induced events reconstructed with sub-degree angular resolution. The new event sample covers three years of detector data and leads to a factor of 10 improvement in sensitivity to point sources emitting below 100 TeV in the southern sky. No statistically significant evidence of point sources was found, and upper limits are set on neutrino emission from individual sources. A posteriori analysis of the highest-energy (~100 TeV) starting event in the sample found that this event alone represents a 2.8σ deviation from the hypothesis that the data consists only of atmospheric background.
publishDate 2016
dc.date.none.fl_str_mv 2016-06-21
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/63561
Aartsen, M. G.; Abraham, K.; Ackermann, M.; Adams, J.; Aguilar, J. A.; et al.; Lowering IceCube's energy threshold for point source searches in the Southern Sky; IOP Publishing; Astrophysical Journal; 824; 2; 21-6-2016; 1-19
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63561
identifier_str_mv Aartsen, M. G.; Abraham, K.; Ackermann, M.; Adams, J.; Aguilar, J. A.; et al.; Lowering IceCube's energy threshold for point source searches in the Southern Sky; IOP Publishing; Astrophysical Journal; 824; 2; 21-6-2016; 1-19
0004-637X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/2041-8205/824/2/L28
info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8205/824/2/L28
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1605.00163
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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