scholarly journals Search for UHE neutrinos in coincidence with LIGO GW150914 event with the Pierre Auger Observatory

2016 ◽  
Vol 12 (S324) ◽  
pp. 295-298
Author(s):  
Lili Yang ◽  
Keyword(s):  
Energy Range ◽  
Gravitational Wave ◽  
High Energy ◽  
Universal Time ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
Upper Limit ◽  
Surface Detector ◽  
High Energy Regime

AbstractThe first gravitational wave transient GW150914 was observed by Advanced LIGO on September 14th, 2015 at 09:50:45 Universal Time. In addition to follow-up electromagnetic observations, the detection of neutrinos will probe deeply and more on the nature of astrophysical sources, especially in the ultra-high energy regime. Neutrinos in the EeV energy range were searched in data collected at the surface detector of the Pierre Auger Observatory within ± 500 s and 1 day after the GW150914 event. No neutrino candidates were found. Based on this non-observation, we derive the first and only neutrino fluence upper limit at EeV energies for this event at 90% CL, and report constraints on existence of accretion disk around mergers.

scholarly journals Bound on a flux of ultra-high energy neutrinos in a scenario with extra dimensions

2018 ◽  
Vol 191 ◽  
pp. 08010
Author(s):  
Mikhail Astashenkov ◽  
Alexander Kisselev
Keyword(s):  
Energy Range ◽  
Upper Bound ◽  
Extra Dimensions ◽  
Neutrino Flux ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
Expected Number ◽  
Surface Detector ◽  
Ultra High Energy Neutrinos

Assuming that a single-flavor diffuse neutrino flux dNv/dEv is equal to kE-2v in the energy range 1017 eV - 2:5 × 1019 eV, an upper bound on k is calculated in the ADD model as a function of the number of extra dimensions n and gravity scale MD. An expected number of neutrino induced events at the Surface Detector array of the Pierre Auger Observatory is estimated.

scholarly journals LIMIT ON UHE NEUTRINO FLUXES FROM THE PIERRE AUGER OBSERVATORY

2013 ◽  
Vol 53 (A) ◽  
pp. 756-759
Author(s):  
S. Maldera
Keyword(s):  
Point Source ◽  
High Energy ◽  
Time Structure ◽  
Pierre Auger Observatory ◽  
Tau Leptons ◽  
Ultra High Energy ◽  
Tau Neutrinos ◽  
Surface Detector ◽  
Recorded Data ◽  
Neutrino Fluxes

The surface detector of the Pierre Auger Observatory is sensitive to Ultra High Energy (UHE) neutrinos. Neutrinos of all flavors can interact in the atmosphere producing inclined showers near the ground. Moreover, ultra high energy Earth-skimming tau neutrinos can be observed through the detection of showers induced by the decay of tau leptons created by interactions in the Earth’s crust. In both cases, neutrino showers can be identified through the time structure of the signals in the surface detector stations. Two sets of identification criteria have been designed to search for down-going and up-going neutrinos in the recorded data, with no candidates found. We will discuss the identification criteria used, and we will present the corresponding limits on the diffuse and point source neutrino fluxes.

scholarly journals Multi-messengers at ultra-high energies with the Pierre Auger Observatory

4open ◽  
2020 ◽  
Vol 3 ◽  
pp. 4
Author(s):  
Julien Souchard
Keyword(s):  
Gravitational Waves ◽  
Cosmic Ray ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
Complete Understanding ◽  
High Energies ◽  
Binary Mergers ◽  
Shed Light

The Pierre Auger Observatory is an Ultra-High Energy Cosmic Ray (UHECR) detector which has studied cosmic particles with energies above and around 1018 eV for more than 15 years. It has proved to be the most competitive instrument at these energies and has produced a wealth of valuable results, improving our understanding of UHECRs. A complete understanding of these highest energy particles is crucial to understand the extreme astrophysical events in which they are produced and accelerated, as well as their propagation to Earth. In the same range of energies, UHE photons and neutrinos are of paramount importance as, being electrically neutral, they point back to their origin while charged particles are deflected in the galactic and extragalactic magnetic fields. The flux of extragalactic photons, neutrinos, and cosmic rays are believed to be highly linked, by their origin and their interactions. Each messenger provides different information about the potential sources, and having detection means for all four messengers, including gravitational waves, allows us to shed light on energetic sources of astroparticles. The Pierre Auger Observatory benefits from a large exposure and a good angular resolution, and is efficient in detecting UHE photons and neutrinos. These performances make possible follow-up searches for events detected by gravitational waves, such as the binary mergers observed by the LIGO/Virgo detectors, or any other energetic sources of particles.

scholarly journals Multi-messenger Astrophysics at Ultra-High Energy with the Pierre Auger Observatory

2019 ◽  
Vol 210 ◽  
pp. 03002
Author(s):  
Jaime Alvarez-Muñiz ◽  
Keyword(s):  
Large Fraction ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Observatory Data ◽  
Binary Mergers ◽  
Neutrino Fluxes ◽  
High Energy Particles

The study of correlations between observations of fundamentally different nature from extreme cosmic sources promises extraordinary physical insights into the Universe. With the Pierre Auger Observatory, we can significantly contribute to multi-messenger astrophysics by searching for ultra-high energy particles, particularly neutrinos and photons which, being electrically neutral, point back to their origin. Using Pierre Auger Observatory data, stringent limits at EeV energies have been established on the photon and neutrino fluxes from a large fraction of the sky, probing the production mechanisms of ultra-high energy cosmic rays. The good angular resolution and the neutrino identification capabilities of the Observatory at EeV energies allow the follow-up of events detected in gravitational waves, such as the binary mergers observed with the Advanced LIGO/Virgo detectors, or from other energetic sources of particles.

scholarly journals Ultra-high energy neutrinos searches with the Pierre Auger Observatory

2019 ◽  
Author(s):  
Marta Trini
Keyword(s):  
Cosmic Rays ◽  
Dominant Role ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Neutrino Production ◽  
Surface Detector ◽  
High Energy Neutrinos ◽  
Ultra High Energy Neutrinos

In the EeV range, neutrinos are expected to be produced by ultra-high energy cosmic rays interactions with the Cosmic Microwave Background during propagation in the Universe. We report on the search for ultra-high energy neutrinos in data collected with the Surface Detector of the Pierre Auger Observatory. The searches are most efficient in the zenith angle range from 60 degrees to 95 degrees with tau neutrinos skimming in the Earth playing a dominant role. The present non-detection of UHE neutrinos in the Pierre Auger Observatory excludes the most optimistic scenarios of neutrino production in terms of UHE cosmic rays chemical composition and cosmological evolution of the acceleration sites. We also report on the searches for neutrinos in coincidence with the recent Gravitational Wave events detected by LIGO/Virgo.

scholarly journals AGILE Observations of the LIGO-Virgo Gravitational-wave Events of the GWTC-1 Catalog

2022 ◽  
Vol 924 (2) ◽  
pp. 80
Author(s):  
A. Ursi ◽  
F. Verrecchia ◽  
G. Piano ◽  
C. Casentini ◽  
M. Tavani ◽  
...  
Keyword(s):  
Energy Range ◽  
Gravitational Wave ◽  
Gamma Ray ◽  
Time Window ◽  
Time Frame ◽  
Upper Limit ◽  
Agile Satellite ◽  
Credible Region ◽  
Soft Spectrum

Abstract We present a comprehensive review of AGILE follow-up observations of the Gravitational Wave (GW) events and the unconfirmed marginal triggers reported in the first LIGO-Virgo (LV) Gravitational Wave Transient Catalog (GWTC-1). For seven GW events and 13 LV triggers, the associated 90% credible region was partially or fully accessible to the AGILE satellite at the T 0; for the remaining events, the localization region was not accessible to AGILE due to passages into the South Atlantic Anomaly, or complete Earth occultations (as in the case of GW170817). A systematic search for associated transients, performed on different timescales and on different time intervals about each event, led to the detection of no gamma-ray counterparts. We report AGILE MCAL upper limit fluences in the 400 keV–100 MeV energy range, evaluated in a time window of T 0 ± 50 s around each event, as well as AGILE GRID upper limit (UL) fluxes in the 30 MeV–50 GeV energy range, evaluated in a time frame of T 0 ± 950 s around each event. All ULs are estimated at different integration times and are evaluated within the portions of GW credible region accessible to AGILE at the different times under consideration. We also discuss the possibility of AGILE MCAL to trigger and detect a weak soft-spectrum burst such as GRB 170817A.

ENERGY ORDERING EFFECTS IN THE ARRIVAL DIRECTIONS OF ULTRA-HIGH ENERGY COSMIC RAYS MEASURED BY THE PIERRE AUGER OBSERVATORY

2011 ◽  
Vol 20 (supp02) ◽  
pp. 50-56
Author(s):  
◽  
PETER SCHIFFER
Keyword(s):  
Cosmic Rays ◽  
Magnetic Fields ◽  
Charged Particles ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Ordering Effects ◽  
Arrival Directions

The Pierre Auger Observatory is the world's largest experiment for the measurement of ultra-high energy cosmic rays (UHECRs). These UHECRs are assumed to be to be charged particles, and thus are deflected in cosmic magnetic fields. Recent results of the Pierre Auger Observatory addressing the complex of energy ordering of the UHECRs arrival directions are reviewed in this contribution. So far no significant energy ordering has been observed.

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