Blackbody Radiation

The blackbody spectrum is another option that can be chosen. The flux density is calculated as a function of wavelength (14) for the user-defined temperature (T).

$$\lambda \propto {\frac{{1}}{{\lambda^5 \cdot \exp \left ( \frac{\mathrm{hc}}{\mathrm{k}\lambda \mathrm{T_{BB}}}\right )-1}}}$$ (13)

h	:	Planck's constant h = 6, 62607 . 10-34 Js
c	:	velocity of light c = 2.9983 . 108 ${\frac{{m}}{{s}}}$
k	:	Boltzmann's constant k = 1, 3807 . 10-23 ${\frac{{J}}{{s}}}$
T BB	:	Blackbody temperature

After that calculation the flux is normalized to the magnitude given by the user.