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J.C. Wilson (Cornell), M.F. Skrutskie (UMASS), J.E. Gizis, J.D. Kirkpatrick (IPAC), D.G. Monet (USNOFS), J.R. Houck (Cornell)
Peak energy emission shifts into the NIR for late-M, L and T-dwarfs due to their cool effective temperatures. Spectral classification of these objects based upon features in the red-optical require very large telescopes due to their intrinsic faintness at such wavelengths. With a few thousand candidate L and T-dwarfs expected to be identified by 2MASS in the northern hemisphere alone, a more practical method is needed to spectrally confirm candidates and identify interesting objects for follow-up with large telescopes.
We present a grid of low resolution (R 300) NIR late-M and L-dwarf spectra observed with the Cornell Massachusetts Slit Spectrograph on the Palomar 60-inch. CorMASS was built specifically for the efficient confirmation and classification of candidate low-mass objects. We discuss spectral type assignments based on this grid and available NIR features, and present some new 2MASS late-M and L-dwarfs confirmed with CorMASS.
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The author(s) of this abstract have provided an email address for comments about the abstract: jcw14@cornell.edu