Burst selection (top) and background selection (bottom) for an SGR 1900+14 burst for spectral analysis. Red regions indicate parts used in spectral analysis. The dashed line in the top panel indicates the limit above which pulse pile-up occurs. The upper limit is 90,000 counts s⁻¹ since five PCUs were active during this observation. The time resolutions are 2 ms (top) and 0.125 s (bottom).