A Data Science Platform to Enable Time-domain Astronomy

SkyPortal is an open-source software package designed to efficiently discover interesting transients, manage follow-up, perform characterization, and visualize the results. By enabling fast access archival catalog data, cross-matching heterogeneous data streams, triggering monitoring of on-demand observations for further a SkyPortal-based platform has been operating at scale 2 yr Zwicky Transient Facility Phase II community, with hundreds users, containing tens millions time-domain sources, interacting dozens telescopes, community reporting. While emphasizes rich user experiences (UX) across common frontend workflows, recognizing that scientific inquiry increasingly performed programmatically, also surfaces extensive well-documented API system. From backend science analysis tools visualization frameworks, design re-use leveraging best-in-class approaches, strong extensibility ethos. For instance, now leverages ChatGPT large-language models (LLMs) automatically generate surface source-level human-readable summaries. With imminent re-start next-generation gravitational wave detectors, includes dedicated multi-messenger features addressing requirements rapid follow-up: multi-telescope management, team/group organizing interfaces, streams optical surveys, interfaces sufficiently intuitive newcomers field. (abridged)