\label{tab:vegafluxes}The four standard filters, and the brightness per unit wavelength of Vega when observed through each.
Filter Central Wavelength Brightness of Vega Luminosity of the Sun
B (deep blue) 440nm \(6.3\times 10^{-11}{\rm W}{\rm m}^{-2}{\rm nm}^{-1}\) \(6\times 10^{23}\) W/nm
V (green) 550nm \(3.6\times 10^{-11}{\rm W}{\rm m}^{-2}{\rm nm}^{-1}\) \(6\times 10^{23}\) W/nm
R (dark red) 700nm \(2.2\times 10^{-11}{\rm W}{\rm m}^{-2}{\rm nm}^{-1}\) \(4.5\times 10^{23}\) W/nm
I (infrared) 880nm \(1.1\times 10^{-11}{\rm W}{\rm m}^{-2}{\rm nm}^{-1}\)