Derived parameters from the FIRE spectrum. Top: best fit of the FIRE spectrum (solid black) in the J-band for the LTE MARCS models (dashed-dot red) and the NLTE-corrected version (solid blue) with the NLTE effects applied to the indicated lines. The spectral regions used in the fitting are shown with gray shades. Bottom: best LTE MARCS model (dotted red) from the J-band to the FIRE spectrum (black). The model was reddened with E(B − V) = 1.05 mag to match the SED. The green-shaded region highlights the spectral region shown in the upper plot.