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Caption: Figure 3.
Differences in extracted absolute flux between the SPIFF and IRSA spectrophotometry tools for the T2.5 substellar object SIMP J013656.5+093347.3. Synthetic spectrophotometry was also reconstructed based on the JWST NIRSpec prism observations of GO program 3548, where the median of all observed epochs is shown for each wavelength bin. The SPIFF pipeline recovers absolute flux values slightly more consistent with those of JWST (the median of residuals indicate a 2.2% smaller flux in the SPIFF reduction, with median absolute deviations of 7.6%, whereas the residuals of the IRSA spectrum are 4.9% fainter with a median absolute deviation of 8.6%). Splines are shown as solid lines to guide the eye only. See Section 4.1 for more details.
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