The proposed THESEUS mission will vastly expand the capabilities to monitor the high-energy sky. It will specifically 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 2030s 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 and guest observer opportunities.

拟议的忒修斯任务将极大地扩展监测高能天空的能力。它将专门利用伽马射线爆发的大量样本来探测早期宇宙，追溯到第一代恒星，并通过检测和定位引力波和宇宙中微子源的对应物来推进多信使天体物理学。这些活动与预计在 2030 年代运行的多波长、多信使设施相结合和协调，将为天体物理学、宇宙学和基础物理学许多领域开辟新的探索途径，从而为整个科学影响力增添相当大的力量。忒修斯和这些设施。我们在这里讨论一些强大的协同效应和客座观察员机会。