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Limits on point-like sources of ultra-high-energy neutrinos with the Pierre Auger Observatory

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Journal of Cosmology and Astroparticle Physics
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A. Aab
A. Aab
A. Aab
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P. Abreu
P. Abreu
P. Abreu
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Marco Aglietta at INFN - Istituto Nazionale di Fisica Nucleare
Marco Aglietta
I.F.M. Albuquerque
I.F.M. Albuquerque
I.F.M. Albuquerque
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Abstract

With the Surface Detector array (SD) of the Pierre Auger Observatory we can detect neutrinos with energy between 1017 eV and 1020 eV from point-like sources across the sky, from close to the Southern Celestial Pole up to 60o in declination, with peak sensitivities at declinations around ~ −53o and ~+55o, and an unmatched sensitivity for arrival directions in the Northern hemisphere. A search has been performed for highly-inclined air showers induced by neutrinos of all flavours with no candidate events found in data taken between 1 Jan 2004 and 31 Aug 2018. Upper limits on the neutrino flux from point-like steady sources have been derived as a function of source declination. An unrivaled sensitivity is achieved in searches for transient sources with emission lasting over an hour or less, if they occur within the field of view corresponding to the zenith angle range between 60o and 95o where the SD of the Pierre Auger Observatory is most sensitive to neutrinos.
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JCAP11(2019)004
ournal of
Cosmology and Astroparticle Physics
An IOP and SISSA journal
J
Limits on point-like sources of
ultra-high-energy neutrinos with the
Pierre Auger Observatory
The Pierre Auger collaboration
E-mail: auger spokespersons@fnal.gov
Received June 19, 2019
Revised September 3, 2019
Accepted October 14, 2019
Published November 5, 2019
Abstract. With the Surface Detector array (SD) of the Pierre Auger Observatory we can
detect neutrinos with energy between 1017 eV and 1020 eV from point-like sources across the
sky, from close to the Southern Celestial Pole up to 60◦in declination, with peak sensitiv-
ities at declinations around ∼ −53◦and ∼+55◦, and an unmatched sensitivity for arrival
directions in the Northern hemisphere. A search has been performed for highly-inclined air
showers induced by neutrinos of all flavours with no candidate events found in data taken
between 1 Jan 2004 and 31 Aug 2018. Upper limits on the neutrino flux from point-like
steady sources have been derived as a function of source declination. An unrivaled sensitiv-
ity is achieved in searches for transient sources with emission lasting over an hour or less, if
they occur within the field of view corresponding to the zenith angle range between 60◦and
95◦where the SD of the Pierre Auger Observatory is most sensitive to neutrinos.
Keywords: cosmic ray experiments, cosmological neutrinos, neutrino astronomy, ultra high
energy cosmic rays
ArXiv ePrint: 1906.07419
c
2019 IOP Publishing Ltd and Sissa Medialab https://doi.org/10.1088/1475-7516/2019/11/004
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