Abstract
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.
Highlights
Multi-messenger astronomy consists on the simultaneous observation of different messengers of the Universe namely, electromagnetic radiation, gravitational waves, neutrinos, and cosmic rays
We report on the follow-up in ultra-high energy (UHE) neutrinos of GW events detected with the Advanced LIGO and Virgo detectors
The Pierre Auger Observatory is a key detector in the field of Multi-messenger Astrophysics at EeV energies
Summary
Multi-messenger astronomy consists on the simultaneous observation of different messengers of the Universe namely, electromagnetic radiation, gravitational waves, neutrinos, and cosmic rays These are in general created by different astrophysical processes and reveal different information about their sources. The IceCube detector observed a correlation an energetic neutrino candidate event and a gamma-ray flare from the powerful blazar TXS-0506+056 [20], along with a burst of events earlier in the same direction [21], hinting at the first identified source of neutrinos in the hundreds of TeV range In this contribution we report on the search for neutrinos from the blazar TXS 506+056 in the EeV range with Auger
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