Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities

TL;DR

The THESEUS mission aims to significantly enhance high-energy sky monitoring, enabling early Universe studies, multi-messenger astrophysics, and synergistic observations with large 2030s facilities, thereby broadening astrophysical research horizons.

Contribution

This paper outlines the planned synergies between the THESEUS mission and future large-scale facilities, highlighting new opportunities for multi-messenger and multi-wavelength astrophysics.

Findings

Enhanced detection of gamma-ray bursts and their use in probing the early Universe.

Improved localization of gravitational wave and neutrino sources.

Potential for groundbreaking discoveries through coordinated multi-messenger observations.

Abstract

The proposed THESEUS mission will vastly expand the capabilities to monitor the high-energy sky, and will exploit large samples of gamma-ray bursts to probe the early Universe back to the first generation of stars, and to advance multi-messenger astrophysics by detecting and localizing the counterparts of gravitational waves and cosmic neutrino sources. The combination and coordination of these activities with multi-wavelength, multi-messenger facilities expected to be operating in the thirties will open new avenues of exploration in many areas of astrophysics, cosmology and fundamental physics, thus adding considerable strength to the overall scientific impact of THESEUS and these facilities. We discuss here a number of these powerful synergies.