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Funding for this research was provided by:
National Science Foundation (AST2407603)
National Science Foundation (AST2407064)
National Aeronautics and Space Administration (NNG08FD60C)
Article Title: Compelling Evidence for a Harmonic in the Light Curve of the Supermassive Black Hole Binary Candidate PKS J1309+1154
Journal Title: The Astrophysical Journal Letters
Article Type: paper
Copyright Information: © 2026. The Author(s). Published by the American Astronomical Society.
Publication dates
Date Received: 2025-11-12
Date Accepted: 2025-11-28
Online publication date: 2026-01-08