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\end{equation}  in units of Janskys per synthesized beam area.   \subsubsection{Minimize SEFD}  \begin{equation}\label{eq:system_equivalent_flux_density}  SEFD = {\frac{T_{sys}}{K}}  \end{equation}  \subsubsection{Maximize System Efficiency}  \begin{equation}\label{eq:system_efficiency}  \eta_s = {\frac{1}{\eta_s }}{\frac{T_{sys}}{\sqrt{2 \Delta \nu \tau_{acc}}}}  
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