In a synthesis imaging array, the sensitivity K is defined by
where is the antenna temperature and S is the source flux density. A table of sensitivities for various VLA receivers is given by Perley et al. (1988, p. 143).
References
Perley, R.; Schwab, F.; and Bridle, A. Synthesis Imaging in Radio Astronomy: Third NRAO Summer School, 1988. San Francisco, CA: Astronomical Society of the Pacific, 1988.
