Listening to the Standard Candles: A Survey-Scale Search for Phase-Coded Beacons in Cepheids, RR~Lyrae and $β$~Cephei Stars

Learned et al. (2008) proposed that a civilization could use Cepheids and RR Lyrae stars, the most closely watched clocks in astronomy, as beacons, firing pulsations early with a particle beam to write a message into the timing residuals. The one search to date examined a single Kepler star. We desc