| Summary: | Thanks to its long photometric stares, PLATO will likely identify multipletransiting circumbinary planets. However the duration of its long stares areinsufficient to measure circumbinary planet masses accurately using eclipsetiming variations of the central binary. In this talk I show our effortson HARPS and SOPHIE to detect circumbinary planets orbiting single-linedeclipse binaries. I will show the first ground-based detections ofcircumbinary planets made by SOPHIE, HARPS in radial-velocities, and the first circumbinary planet transit obtained from ground, using ASTEP inAntarctica. The methods we are developing are key to prepare for theconfirmation of PLATO's circumbinary planets.
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