Analysis of L, S, C, and X Bands Using a Model-Independent Dark Matter Search Technique

We present a full analysis of the L, S, C and X bands using a unique technique that searches for radio signals consistent with the phase space of the Milky Way halo. This method relies on only two general assumptions to allow for a model-independent study. The first is that virialized dark matter in the halo can decay or annihilate to produce a quasi monochromatic radio line exhibiting a Doppler shift with position according to the solar motion through a static Galactic halo. The second is that such a signal would similarly vary in intensity based on its position with respect to the Galactic center. This analysis uses the full Breakthrough Listen GBT data set (~25,000 spectra).