Dead-time corrections are important (i.e., are greater than 1%) only for
line emission above 30
count s^{-1} integrated over the line, or
> 4 count pixel^{-1}s^{-1} at the peak for a line of 3 Å full-width
at half-maximum (FWHM), or
> 3 count pixel^{-1}s^{-1} at the peak of
a 6 Å FWHM line.
Continuum emission limits are lower, with corrections important only at rates
exceeding 1 count pixel^{-1}s^{-1}. Since few HUT targets exceed these rates and since the Monte-Carlo detector
model is computationally expensive, dead-time corrections are not routinely
calculated for all HUT spectra in the reduction process.
When appropriate, these calculations must be done off-line separately for
each observation.