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Detection experiments

The point source sensitivity (one $\sigma$ level) for an $N_a$ antenna array, over a bandwidth $B$ in a time $T_{\rm ON}$ is given by


\begin{displaymath}
\sigma = \frac{J_{\rm pK} T_{\rm sys}}{\eta \sqrt{N_a (N_a-1) N_c T_{\rm ON} B}} \frac{1}{\sqrt{N_{\rm pol}}}
\end{displaymath} (1)

where

Assuming typical summer conditions at the NOEMA site, 6 antennas, an integration time of one hour in a 3.6 GHz bandwidth and using both polarizations, we find point source sensitivities $\sigma$ of 0.09 mJy at 90 GHz, 0.19 mJy at 150 GHz, 0.52 mJy at 230 GHz, and 1.61 mJy at 300 GHz. For a full synthesis (e.g., 2 configurations or 10 hours on source), this goes down to about 0.03 mJy, 0.06 mJy, 0.18 mJy, and 0.51 mJy, respectively.


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