Flux Density = {1-exp{-tau} summation_i { Omega_i B(lambda, T_i) }
1.1910 10^4 lambda ^-5
B = -----------------------
[W/cm^2/um/sr]
(exp {14387.7 / [ lambda T ] - 1 )
where lambda is in microns.
Alternative, one can make one's own guesses in the Guess/Fit
text areas.
Last update: 20 Nov 1998