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We report results of a novel high-energy follow-up observation of a potentialFast Radio Burst. The radio burst was detected by VLA/realfast and followed-upby the Neil Gehrels Swift Observatory in very low latency utilizing newoperational capabilities of Swift (arXiv:2005.01751), with pointed soft X-rayand UV observations beginning at T0+32 minutes, and hard X-ray/gamma-ray eventdata saved around T0. These observations are $>10$x faster than previousX-ray/UV follow-up of any radio transient to date. No emission is seencoincident with the FRB candidate at T0, with a 0.2s fluence $5\sigma$ upperlimit of $1.35\times10^{-8}$ erg cm$^{-2}$ (14-195 keV) for a SGR1935+2154-like flare, nor at T0+32 minutes down to $3\sigma$ upper limits of22.18 AB mag in UVOT u band, and $3.33\times10^{-13}$ erg cm$^{-2}$ s$^{-1}$from 0.3-10 keV for the 2 ks observation. The candidate FRB alone is notsignificant enough to be considered astrophysical, so this note serves as atechnical demonstration. These new Swift operational capabilities will allowfuture FRB detections to be followed up with Swift at even lower latencies thandemonstrated here: 15-20 minutes should be regularly achievable, and 5-10minutes occasionally achievable. We encourage FRB detecting facilities torelease alerts in low latency to enable this science.

A Demonstration of Extremely Low Latency $\gamma$-ray, X-Ray & UV Follow-Up of a Millisecond Radio Transient