A Large-Scale Survey of the Anti-Solar Point with the Allen Telescope Array

In the search for technosignatures, it can be useful to narrow down the cosmic haystack by prioritizing time-coordinate “Schelling Points” at which a beacon may be more likely to be transmitted. One such Schelling Point is the Anti-Solar Point (ASP), the place and moment at which Earth would lie directly between a hypothetical transmitter in the Earth Transit Zone (i.e., ecliptic) and the Sun. In this talk, I will describe a campaign to survey the ASP for radio technosignatures using the Allen Telescope Array (ATA) and describe the results of both the pilot observations (Summer 2023) and the beginning of the full campaign (starting in Fall 2024). I will also discuss the modernized ATA SETI pipeline that has been developed for the ASP program, but will be deployed on other ATA SETI campaigns moving forward.