Observation of the cosmic ray shadow of the Sun with the ANTARES neutrino telescope

Abstract

ANTARES is the largest undersea neutrino telescope and it has been taking data in its final configuration for more than ten years. On their journey to the Earth, cosmic rays can be absorbed by celestial objects, like the Sun, leading to a deficit in the atmospheric muon flux measured by the ANTARES detector, the so-called Sun "shadow" effect. This phenomenon can be used to evaluate fundamental telescope characteristics: the detector angular resolution and pointing accuracy. This work describes the study of the Sun "shadow" effect using the ANTARES data collected between 2008 and 2017. The statistical significance of the Sun shadow observation is $3.7\sigma$ and the estimated angular resolution value of the ANTARES telescope for downward-going muons is $0.59^{\circ }\pm 0.10^{\circ }$, which is consistent with the expectations obtained from the Monte Carlo simulations and also with the estimation from the Moon "shadow" analysis of 2007-2016 years. No evidence of systematic pointing shift is found and the resulting pointing accuracy is consistent with the expectations.

5 pages, 3 figures, VLVnT 2021 Conference proceedings

References in corpus (4)

• Atmospheric MUons from PArametric formulas: a fast GEnerator for neutrino telescopes (MUPAGE)
• Monte Carlo simulations for the ANTARES underwater neutrino telescope
• Measurements of the Time-Dependent Cosmic-Ray Sun Shadow with Seven Years of IceCube Data -- Comparison with the Solar Cycle and Magnetic Field Models
• Observation of the cosmic ray shadow of the Sun with the ANTARES neutrino telescope

Cited by in corpus (1)

• The Influence of Sun's and Moon's Shadows on Cosmic-Ray Anisotropy