h | : | Planck's constant
h = 6, 62607^{ . }10^{-34} Js |

c | : | velocity of light
c = 2.9983^{ . }10^{8} |

k | : | Boltzmann's constant
k = 1, 3807^{ . }10^{-23} |

T
_{BB} |
: | Blackbody temperature |

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

Andre Germeroth 2016-11-04