The National Science Foundation (NSF) is supporting research through the "Windows on the Universe: The Era of Multi-Messenger Astrophysics" (WoU-MMA) program. This initiative seeks to integrate observations from electromagnetic waves, high-energy particles (including neutrinos and cosmic rays), and gravitational waves, fostering multi-messenger astrophysical explorations. The WoU-MMA program emphasizes coordination of observations across multiple messengers, interpretation through theory, experiments, and simulations, and advancing interoperability in research.

Competitive proposals should address at least one of the following:
1. Coordination: Developing coordinated multi-messenger observations.
2. Observations: Investigating astrophysical sources emitting more than one type of messenger.
3. Interpretation: Enhancing theoretical or experimental frameworks for interpreting multi-messenger data.

Proposals that advance the integration of research communities and develop a skilled workforce in multi-messenger astrophysics are also encouraged.

Applicants must submit proposals through NSF’s Research.gov or Grants.gov portals, adhering to the relevant program guidelines. The proposal deadlines and submission windows vary by program and are listed under the relevant participating programs. Proposals may also be considered under secondary programs if aligned with WoU-MMA’s goals.

For inquiries, program contacts include Hans A. Krimm, Nigel A. Sharp, and Martin D. Still, with contact information available on the NSF website.