OpenUniverseThe LSST Dark Energy Science CollaborationThe Roman HLIS Project Infrastructure TeamThe Roman RAPID Project Infrastructure Team TeamThe Roman Supernova Cosmology Project Infrastructure TeamAlarcon, A.Aldoroty, L.Beltz-Mohrmann, G.Bera, A.Blazek, J.Bogart, J.Braeunlich, G.Broughton, A.Cao, K.Chiang, J.Chisari, N. E.Desai, V.Fang, Y.Galbany, L.Hearin, A.Heitmann, K.Hirata, C.Hounsell, RebekahJain, B.Jarvis, M.Jencson, J.Kannawadi, A.Kasliwal, M. K.Kessler, R.Kiessling, A.Knop, R.Kovacs, E.Laher, R.Laliotis, K.Lin, C.Lopes, I.Mahabal, A.Mandelbaum, R.Masiero, J.Mau, S.Meehan, C.Meyers, J.Moraes, B.Paladini, R.Pearl, A.Malagon, A. PlazasRose, B.Rubin, D.Rusholme, B.Santos, A.奱r?evi?, N.Scolnic, D.Troxel, M. A.Alfen, N. VanDyke, S. VanWalter, C. W.Wu, T.Yamamoto, M.Yan, Y.Zhang, T.2025-01-312025-01-312025-01-10https://doi.org/10.48550/arXiv.2501.05632http://hdl.handle.net/11603/37568The OpenUniverse2024 simulation suite is a cross-collaboration effort to produce matched simulated imaging for multiple surveys as they would observe a common simulated sky. Both the simulated data and associated tools used to produce it are intended to uniquely enable a wide range of studies to maximize the science potential of the next generation of cosmological surveys. We have produced simulated imaging for approximately 70 deg² of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) Wide-Fast-Deep survey and the Nancy Grace Roman Space Telescope High-Latitude Wide-Area Survey, as well as overlapping versions of the ELAIS-S1 Deep-Drilling Field for LSST and the High-Latitude Time-Domain Survey for Roman. OpenUniverse2024 includes i) an early version of the updated extragalactic model called Diffsky, which substantially improves the realism of optical and infrared photometry of objects, compared to previous versions of these models; ii) updated transient models that extend through the wavelength range probed by Roman and Rubin; and iii) improved survey, telescope, and instrument realism based on up-to-date survey plans and known properties of the instruments. It is built on a new and updated suite of simulation tools that improves the ease of consistently simulating multiple observatories viewing the same sky. The approximately 400 TB of synthetic survey imaging and simulated universe catalogs are publicly available, and we preview some scientific uses of the simulations.25 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domainhttps://creativecommons.org/publicdomain/mark/1.0/Astrophysics - Cosmology and Nongalactic AstrophysicsText