Compute F_ν for an MKO IR filter band. There are some problems here since
        "MKO" is filters, not a photometric system, but people try to make
        Vega = 0.

def mag_to_fnu(self, mag):
        """Compute F_ν for an MKO IR filter band. There are some problems here since
        "MKO" is filters, not a photometric system, but people try to make
        Vega = 0.

        """
        return cgs.cgsperjy * self._zeropoints[self.band] * 10**(-0.4 * mag)