# Air shower reconstruction using HAWC and the Outrigger array

## TL;DR

This paper presents a new air shower reconstruction method for the HAWC observatory that combines data from the main array and the outrigger array, enhancing sensitivity at high energies.

## Contribution

It introduces a novel reconstruction technique that integrates data from multiple detector types, improving air shower analysis for HAWC and its outriggers.

## Key findings

- Enhanced reconstruction accuracy demonstrated with Monte Carlo simulations.
- First combined experimental data analysis shows promising results.
- Improved sensitivity at the highest energies.

## Abstract

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory detects cosmic- and gamma-ray initiated air showers in the TeV energy range using 300 water Cherenkov detectors (WCDs). To improve its sensitivity at the highest energies, HAWC has been upgraded with a sparse array of 345 small WCDs (outrigger array) around the HAWC main array. The outrigger array increases the instrumented area of HAWC by a factor of 4 and has started taking data since August 2018. A new gamma-ray reconstruction method has been developed to improve the reconstruction of the air showers which combines the data of mixed type particle detector arrays. In this contribution, we will show the first results of the combined air shower reconstruction of HAWC and its outrigger array using Monte Carlo simulations and the first combined experimental data set.