were rounded up to the nearest 0.25 subtype. As the fits derived by W09 are uncalibrated beyond M9.5, when both WK and QK indices indicated a spectral type later than M9.5, we compared our spectra with the spectra of early L-type brown dwarfs in the Upper Sco association described in @lodieu08, hereafter L08. As a result, we assigned a spectral type of L0 to these objects with an uncertainty of 0.5 spectral types.

We should qualify this re-examination of previously published spectra by saying that our classifications are based solely on our K band spectra. Spectral classifications using other near-infrared or optical wavebands may produce slight differences for different objects. To examine this, we recalculated the spectral types of the Upper Sco objects in L08 using our indices and found that our indices tended to produce spectral types $\sim$0.5 spectral types earlier than those in L08. The variations are close to our estimated uncertainties, however, and we feel justified in this exercise based on the high quality of our data.

![Variations of the K band slope with surface gravity are easily discernible in low resolution spectra. Here we plot smoothed versions of the NIFS spectra of 2MASS 0345 (field dwarf, 