AUTHOR=Humensky T. B. , Roberts C. J. , Barclay T. , Caputo R. , Cenko S. B. , Civano F. , Derleth J. , Hedges C. , Hui M. C. , Kennea J. A. , Kocevski D. , Racusin J. , Rani B. , Sambruna R. M. , Slutsky J. TITLE=NASA’s astrophysics cross-observatory science support (ACROSS) initiative: enabling time-domain and multimessenger astrophysics JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=11 YEAR=2024 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2024.1401785 DOI=10.3389/fspas.2024.1401785 ISSN=2296-987X