# HAWC High Energy Upgrade with a Sparse Array

## TL;DR

This paper discusses the upgrade of the HAWC gamma-ray observatory with a sparse outrigger array to enhance its sensitivity at very high energies, including design components and simulation results.

## Contribution

It introduces the design and simulation optimization of the new sparse outrigger array for the HAWC observatory, a novel enhancement for high-energy gamma-ray detection.

## Key findings

- Optimized the outrigger array design through simulations.
- Improved sensitivity at the highest gamma-ray energies.
- Enhanced detection capabilities of HAWC with the new array.

## Abstract

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory has been fully operational since March 2015. To improve its sensitivity at the highest energies, it is being upgraded with an additional sparse array called outrigger array. We will discuss in this contribution, the different outrigger array components, and the simulation results to optimize it.