Illustration of how Gemini classifies astronomical transient events (IMAGE)

University of Oxford

Illustration of how Gemini classifies astronomical transient events

Caption

Gemini uses three images per candidate—New (the latest science frame showing the putative transient), Reference (an earlier or stacked template of the same part of the sky), and Difference (New minus Reference, isolating any transient signal). From each triplet, Gemini returns three outputs: (1) a real/bogus classification (astrophysical source vs artefact), (2) a concise text explanation describing salient image features and the reasoning behind the decision, and (3) an interest score indicating follow-up prioritisation for rapid flagging to astronomers. Credit: Stoppa & Bulmus et al., Nature Astronomy (2025).

Credit

Stoppa & Bulmus et al., Nature Astronomy (2025).

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