SETI@home analysis of observations of 220 nearby stars

We present the SETI@home analysis of observations of 220 nearby start and 29 non-stellar targets taken in several radio band by the Breakthrough Listen project using the Green Bank Telescope. We describe the data taking process and the analysis pipeline, which utilizes a coherent de-chirp method to search through a large range of accelerating Doppler frames to find signals that are not frequency stable in the topocentric reference frame. We find that most of the high amplitude signal we detect are stable in the topocentric frame. Many have Doppler drift rates similar to what is expected for a satellite in low Earth orbit. We find none that are indicative of a stable frequency in the frame of the barycenter of the solar system. We will show some examples of the signals we detected and discuss their properties. No signals of demonstrably extraterrestrial origin were found.