  The Breakthrough Listen Initiative, as part of its larger mission, is
performing the most thorough technosignature search of nearby stars.
Additionally, Breakthrough Listen is collaborating with scientists working on
NASAs Transiting Exoplanet Survey Satellite (TESS), to examine TESS Targets of
Interest (TOIs) for technosignatures. Here, we present a $1-11$ $\textrm{GHz}$
radio technosignature search of $61$ TESS TOIs that were in transit during
their Breakthrough Listen observation at the Robert C. Byrd Green Bank
Telescope. We performed a narrowband Doppler drift search with a minimum S/N
threshold of $10$, across a drift rate range of $\pm 4$ $\textrm{Hz}$
$\textrm{s}$ $^{-1}$, with a resolution of $3$ $\textrm{Hz}$. We removed radio
frequency interference by comparing signals across cadences of target sources.
After interference removal, there are no remaining events in our survey, and
therefore no technosignature signals-of-interest detected in this work. This
null result implies that at L, S, C, and X bands, fewer than $52\textrm{%}$,
$20\textrm{%}$, $16\textrm{%}$, and $15\textrm{%}$, respectively, of TESS TOIs
possess a transmitter with an equivalent isotropic radiated power greater than
a few times $10^{14}$ $\textrm{W}$.
