# Multi-Messenger Signatures of PeV-ZeV Cosmic Ray Sources

## TL;DR

This paper explores potential cosmic ray sources in the PeV-ZeV range and their associated neutrino and gamma-ray signals, aiming to identify sources and understand their physics through multi-messenger observations.

## Contribution

It provides an overview of candidate sources and discusses the role of multi-messenger detection efforts like the AMON program in identifying these sources.

## Key findings

- Identification of low luminosity gamma-ray bursts as potential sources
- Discussion of neutrino and gamma-ray signatures for source detection
- Analysis of multi-messenger detection strategies

## Abstract

We discuss likely sources of cosmic rays in the $10^{15}-10^{20}$ eV range and their possible very high energy neutrino and gamma-ray signatures which could serve to identify these sources and constrain their physics. Among these sources we discuss in particular low luminosity gamma-ray bursts, including choked and shock-breakout objects, tidal disruption events and white dwarf mergers. Among efforts aimed at simultaneous secondary multi-messenger detections we discuss the AMON program.