spex_summ_emask
spex_summ_emask is a mask showing which energies were used during fitting for each time interval. The array is dimensioned (nenergy,ntime) where nenergy is the total number of energy bins in the original data, and ntime is the number of fit time intervals. For each bin, the mask has a value of 0 or 1 indicating whether the energy bin was used (1 means used) for that time interval.Look at this parameter, as well as the spex_summ_fit_done mask, to determine which energy/time bins are valid:
qenergy = where (s.spex_summ_emask) - indices of energy bins used
qtime = where (s.spex_summ_fit_done) - indices of time intervals fit