OffLine simulation and reconstruction software framework for the JEM-EUSO missions

TL;DR

This paper presents a versatile software framework for simulating and reconstructing data from space-based observatories aimed at detecting ultra-high energy cosmic rays and neutrinos, supporting multiple missions and complex configurations.

Contribution

It introduces a general-purpose, adaptable software framework built on Pierre Auger Collaboration tools for detailed simulation and reconstruction in JEM-EUSO missions.

Findings

Supports multiple missions and platforms

Enables detailed event simulation and reconstruction

Demonstrates application with EUSO-SPB2 data

Abstract

The Joint Experiment Missions for Extreme Universe Observatory comprises a collection of complementary missions dedicated to pioneering technologies and techniques for a future space-based multi-messenger observatory which will have sufficient sensitivity and exposure to measure properties of extremely rare ultra-high energy (E>50 EeV) cosmic rays and very high energy (E>100 PeV) neutrinos. Here we describe a general-purpose software framework designed to facilitate detailed simulation and reconstruction of events observed by the various missions using both detection of fluorescence and Cherenkov light produced when cosmic ray or neutrino-induced extensive air showers traverse Earth's atmosphere. The software builds on a framework developed by the Pierre Auger Collaboration. We describe the techniques used to organize contributions from numerous collaborators, manage an abundance of configuration information, and provide simple access to time-dependent detector and atmospheric information. We also explain how we support a multitude of computing platforms, provide fast installation and maintain the broad testing coverage required for stability of the large and heterogeneous code base. We provide a few examples of simulated and reconstructed data gathered by some of the JEM-EUSO missions, including the EUSO-SPB2 instrument.