Spatiotemporal techniques for signal coordination with actively transmitting extraterrestrial civilizations, without the need for prior communication, can constrain technosignature searches to a significantly smaller coordinate space. Techniques such as the SETI Ellipsoid have been discussed for decades, but more recent strategies, such as those proposed by Seto (2021) and Seto (2024), relax certain astrometrical requirements while retaining the underlying idea of synchronizing signals with conspicuous astrophysical events. These strategies can also give ways to new frameworks for technosignature analysis in the time domain using telescopes and surveys such as Gaia, TESS, and the upcoming Rubin Observatory. I will discuss signal synchronization strategies beyond just the SETI Ellipsoid, some recent developments in time domain SETI, and how the two can be combined in archival, and potentially real-time, data.

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