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Celebration of the first 20 years of the Pierre Auger Observatory

Malargüe, Argentina    
14-16 November 2019

About 300 scientists and guests from all over the world celebrated the 20th anniversary of the Pierre Auger Observatory with a ceremony and a scientific symposium at the site of the Observatory in Argentina. The Pierre Auger Observatory has been built to study ultra-high energy cosmic rays, particles of the highest energies ever observed.

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Directional sensitivity of the Pierre Auger Observatory to sources of UHE neutrinos

In the second paper of a series of two devoted to the search for Ultra-High Energy (UHE) neutrinos at the Pierre Auger Observatory, the Pierre Auger Collaboration has addressed the sensitivity of the Surface Detector array (SD) to steady and transient point sources of UHE neutrinos as a function of declination.

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Constraining the sources of UHECR with neutrinos

In the first paper of a series of two devoted to the search for Ultra-High Energy (UHE) neutrinos at the Pierre Auger Observatory, data collected at the Pierre Auger Observatory has allowed the Pierre Auger Collaboration to put the most stringent limits so far to the diffuse flux of UHE neutrinos in the EeV energy range.  No neutrino candidates were found in ~ 14.7 years of data taken up to 31 August 2018. The absence of neutrino candidates allowed us to constrain several classes of models of neutrino production in interactions of UHECR with the Cosmic Microwave Background (CMB), referred to as cosmogenic neutrino models.

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A crystal clear place to study the skies

In the last few decades, Argentina and Chile have proven themselves prime spots for astronomical observation—a status that has been a boon in many ways for both countries.

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First antenna for the AugerPrime radio upgrade!

March 2019: Young scientists cheer after installing the first antenna for the AugerPrime radio upgrade!

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Getting insights into the measured dipolar anisotropy

The Pierre Auger Collaboration measured a dipolar anisotropy in the arrival-direction distribution of the cosmic rays with energies in excess of 8x1018 eV, finding that the flux is about
6.5% larger than the average in one direction of the sky and it is correspondingly smaller in the opposite direction.

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