Cherenkov Flashes and Fluorescence Flares on Telescopes: New lights on UHECR Spectroscopy while unveiling Neutrinos Astronomy

TL;DR

This paper discusses how Cherenkov and fluorescence telescopes can detect ultra-high-energy cosmic rays and neutrinos by observing air-shower phenomena, offering new insights into cosmic ray composition and neutrino astronomy.

Contribution

It introduces a novel approach to using existing telescopes for detecting air-shower tails and neutrinos, expanding the scope of cosmic ray and neutrino observations.

Findings

Detection of fluorescence flare tails by Cherenkov telescopes.

Geomagnetic splitting helps determine energy and footprint of inclined showers.

Potential to identify primary composition and tau neutrino events.

Abstract

Cherenkov Telescopes (as Magic, Hess and Veritas), while pointing horizontally should reveal also the fluorescence flare tails of nearby down-going air-showers. Such air-showers, born at higher (tens km) altitudes, are growing and extending up to lowest atmospheres (EeVs) or up to higher (few km) quotas (PeVs). Viceversa, as it has been foreseen and only recently observed, the opposite takes place. Fluorescence Telescopes made for UHECR detection may be blazed by inclined Cherenkov lights. The geomagnetic splitting may tag the energy as well as the inclined shower footprint as seen in a recent peculiar event in AUGER. Additional stereoscopic detection may define the event origination distance and its consequent primary composition, extending our understanding on UHECR composition, while unveling a novel tau Neutrino Astronomy.