  Here, we report on the detection and verification of Fast Radio Burst FRB
180301, which occurred on UTC 2018 March 1 during the Breakthrough Listen
observations with the Parkes telescope. Full-polarization voltage data of the
detection were captured--a first for non-repeating FRBs--allowing for coherent
de-dispersion and additional verification tests. The coherently de-dispersed
dynamic spectrum of FRB 180301 shows complex, polarized frequency structure
over a small fractional bandwidth. As FRB 180301 was detected close to the
geosynchronous satellite band during a time of known 1-2 GHz satellite
transmissions, we consider whether the burst was due to radio interference
emitted or reflected from an orbiting object. Based on the preponderance of our
verification tests, we find that FRB 180301 is likely of astrophysical origin,
but caution that anthropogenic sources cannot conclusively be ruled out.
